TY  - CONF
AU  - Rajković, Andrija
AU  - Jovanović, Draško
AU  - Milanović, Mihailo P.
AU  - Ećim-Đurić, Olivera
PY  - 2023
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6746
AB  - The aim of this work was to investigate the drying characteristics and specific energy consumption during convective drying of apricot and apple tree. The measurements were performed in an experimental dryer with disk-shaped wood samples of 20 mm thickness at the temperatures of 40, 50, 60 and 70 oC. The velocity of the air during all experiments was set to be 2 m/s. Overall 8 experiments were performed – 4 with each tree type. Drying time and equilibrium moisture content were determined for each experiment. Analysis of drying curves showed that the increase in drying temperature decreases drying time. Based on the results of drying time, air temperature and velocity the specific energy consumption for drying of apricot and apple samples was determined and analysed.
PB  - University of Belgrade, Faculty of Agriculture, Serbia
C3  - ISAE 2023 The 6th International Symposium on Agricultural Engineering
T1  - INVESTIGATION OF CONVECTIVE DRYING CHARACTERISTICS AND SPECIFIC ENERGY CONSUMPTION OF APRICOT AND APPLE TREE DISCS
EP  - 211
SP  - 206
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_6746
ER  - 

@conference{
author = "Rajković, Andrija and Jovanović, Draško and Milanović, Mihailo P. and Ećim-Đurić, Olivera",
year = "2023",
abstract = "The aim of this work was to investigate the drying characteristics and specific energy consumption during convective drying of apricot and apple tree. The measurements were performed in an experimental dryer with disk-shaped wood samples of 20 mm thickness at the temperatures of 40, 50, 60 and 70 oC. The velocity of the air during all experiments was set to be 2 m/s. Overall 8 experiments were performed – 4 with each tree type. Drying time and equilibrium moisture content were determined for each experiment. Analysis of drying curves showed that the increase in drying temperature decreases drying time. Based on the results of drying time, air temperature and velocity the specific energy consumption for drying of apricot and apple samples was determined and analysed.",
publisher = "University of Belgrade, Faculty of Agriculture, Serbia",
journal = "ISAE 2023 The 6th International Symposium on Agricultural Engineering",
title = "INVESTIGATION OF CONVECTIVE DRYING CHARACTERISTICS AND SPECIFIC ENERGY CONSUMPTION OF APRICOT AND APPLE TREE DISCS",
pages = "211-206",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_6746"
}

Rajković, A., Jovanović, D., Milanović, M. P.,& Ećim-Đurić, O.. (2023). INVESTIGATION OF CONVECTIVE DRYING CHARACTERISTICS AND SPECIFIC ENERGY CONSUMPTION OF APRICOT AND APPLE TREE DISCS. in ISAE 2023 The 6th International Symposium on Agricultural Engineering
University of Belgrade, Faculty of Agriculture, Serbia., 206-211.
https://hdl.handle.net/21.15107/rcub_agrospace_6746

Rajković A, Jovanović D, Milanović MP, Ećim-Đurić O. INVESTIGATION OF CONVECTIVE DRYING CHARACTERISTICS AND SPECIFIC ENERGY CONSUMPTION OF APRICOT AND APPLE TREE DISCS. in ISAE 2023 The 6th International Symposium on Agricultural Engineering. 2023;:206-211.
https://hdl.handle.net/21.15107/rcub_agrospace_6746 .

Rajković, Andrija, Jovanović, Draško, Milanović, Mihailo P., Ećim-Đurić, Olivera, "INVESTIGATION OF CONVECTIVE DRYING CHARACTERISTICS AND SPECIFIC ENERGY CONSUMPTION OF APRICOT AND APPLE TREE DISCS" in ISAE 2023 The 6th International Symposium on Agricultural Engineering (2023):206-211,
https://hdl.handle.net/21.15107/rcub_agrospace_6746 .

TY  - JOUR
AU  - Vučić, Tanja
AU  - Milinčić, Danijel
AU  - Žilić, Slađana
AU  - Ignjatović-Sredović, Ivana
AU  - Sarić, Zlatan
AU  - Ećim-Djurić, Olivera
AU  - Kostić, Aleksandar
AU  - Barać, Miroljub
PY  - 2021
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5909
AB  - The influence of simulated in vitro digestion on antioxidant potential of protein fractions of traditional Serbian white-brined cheeses was investigated. Water-soluble (WSF) and water-insoluble fractions (WINF) of three cow’s and three ovine white-brined cheeses were fractionated. Total antioxidant capac-ity, reducing power and iron (II) chelating properties of these fractions before and after in vitro digestion were assayed. The investigated protein fractions had different antioxidant properties. WSFs had a better total antioxidant capacity and reducing power and less pronounced iron (II) chelating properties than WINFs. A strong negative correlation (-0.818, P<0.05) between the total antioxidant capacities of undigested WSF and WINF of traditional cheeses were observed. In vitro digestion greatly improved the total antioxidant capacities of WINFs (by 16.61-34.18 times), their reducing power (up to 95.77 %) and except in the case of Svrljig ovine cheese, the iron (II) chelating ability as well. A less pronounced increase (up to 71.29 %) of the total antioxidant capacity of WSFs was induced by in vitro digestion. In vitro digestion reduced reducing power of WSF of investigated ovine cheeses as well as reducing power of WSF of Homolje cow’s cheese. Since there was no significant correlation between the investigated antioxidant properties of digested WSFs and their free amino acids and mineral contents the observed differences should be attributed to different composition and properties of low molecular weight pep-tides. Thus, further investigations related to their isolation and characterization needs to be conducted. However, these results indicate that Serbian white-brined cheeses have great potential as source of antioxidant peptides.
PB  - Hrvatska Mljekarska Udruga
T2  - Mljekarstvo
T1  - [The effect of in vitro digestion on antioxidant properties of water-soluble and insoluble protein fractions of traditional serbian white-brined cheeses] [Utjecaj in vitro digestije na antioksidativna svojstva u vodi topljivih i netopljivih proteinskih frakcija tradicionalnih srpskih bijelih sireva u salamuri]
EP  - 265
IS  - 4
SP  - 253
VL  - 70
DO  - 10.15567/mljekarstvo.2020.0403
ER  - 

@article{
author = "Vučić, Tanja and Milinčić, Danijel and Žilić, Slađana and Ignjatović-Sredović, Ivana and Sarić, Zlatan and Ećim-Djurić, Olivera and Kostić, Aleksandar and Barać, Miroljub",
year = "2021",
abstract = "The influence of simulated in vitro digestion on antioxidant potential of protein fractions of traditional Serbian white-brined cheeses was investigated. Water-soluble (WSF) and water-insoluble fractions (WINF) of three cow’s and three ovine white-brined cheeses were fractionated. Total antioxidant capac-ity, reducing power and iron (II) chelating properties of these fractions before and after in vitro digestion were assayed. The investigated protein fractions had different antioxidant properties. WSFs had a better total antioxidant capacity and reducing power and less pronounced iron (II) chelating properties than WINFs. A strong negative correlation (-0.818, P<0.05) between the total antioxidant capacities of undigested WSF and WINF of traditional cheeses were observed. In vitro digestion greatly improved the total antioxidant capacities of WINFs (by 16.61-34.18 times), their reducing power (up to 95.77 %) and except in the case of Svrljig ovine cheese, the iron (II) chelating ability as well. A less pronounced increase (up to 71.29 %) of the total antioxidant capacity of WSFs was induced by in vitro digestion. In vitro digestion reduced reducing power of WSF of investigated ovine cheeses as well as reducing power of WSF of Homolje cow’s cheese. Since there was no significant correlation between the investigated antioxidant properties of digested WSFs and their free amino acids and mineral contents the observed differences should be attributed to different composition and properties of low molecular weight pep-tides. Thus, further investigations related to their isolation and characterization needs to be conducted. However, these results indicate that Serbian white-brined cheeses have great potential as source of antioxidant peptides.",
publisher = "Hrvatska Mljekarska Udruga",
journal = "Mljekarstvo",
title = "[The effect of in vitro digestion on antioxidant properties of water-soluble and insoluble protein fractions of traditional serbian white-brined cheeses] [Utjecaj in vitro digestije na antioksidativna svojstva u vodi topljivih i netopljivih proteinskih frakcija tradicionalnih srpskih bijelih sireva u salamuri]",
pages = "265-253",
number = "4",
volume = "70",
doi = "10.15567/mljekarstvo.2020.0403"
}

Vučić, T., Milinčić, D., Žilić, S., Ignjatović-Sredović, I., Sarić, Z., Ećim-Djurić, O., Kostić, A.,& Barać, M.. (2021). [The effect of in vitro digestion on antioxidant properties of water-soluble and insoluble protein fractions of traditional serbian white-brined cheeses] [Utjecaj in vitro digestije na antioksidativna svojstva u vodi topljivih i netopljivih proteinskih frakcija tradicionalnih srpskih bijelih sireva u salamuri]. in Mljekarstvo
Hrvatska Mljekarska Udruga., 70(4), 253-265.
https://doi.org/10.15567/mljekarstvo.2020.0403

Vučić T, Milinčić D, Žilić S, Ignjatović-Sredović I, Sarić Z, Ećim-Djurić O, Kostić A, Barać M. [The effect of in vitro digestion on antioxidant properties of water-soluble and insoluble protein fractions of traditional serbian white-brined cheeses] [Utjecaj in vitro digestije na antioksidativna svojstva u vodi topljivih i netopljivih proteinskih frakcija tradicionalnih srpskih bijelih sireva u salamuri]. in Mljekarstvo. 2021;70(4):253-265.
doi:10.15567/mljekarstvo.2020.0403 .

Vučić, Tanja, Milinčić, Danijel, Žilić, Slađana, Ignjatović-Sredović, Ivana, Sarić, Zlatan, Ećim-Djurić, Olivera, Kostić, Aleksandar, Barać, Miroljub, "[The effect of in vitro digestion on antioxidant properties of water-soluble and insoluble protein fractions of traditional serbian white-brined cheeses] [Utjecaj in vitro digestije na antioksidativna svojstva u vodi topljivih i netopljivih proteinskih frakcija tradicionalnih srpskih bijelih sireva u salamuri]" in Mljekarstvo, 70, no. 4 (2021):253-265,
https://doi.org/10.15567/mljekarstvo.2020.0403 . .

TY  - JOUR
AU  - Vučić, Tanja
AU  - Milincić, Danijel D.
AU  - Žilić, Sladjana
AU  - Sredović-Ignjatović, Ivana
AU  - Sarić, Zlatan
AU  - Ećim-Djurić, Olivera
AU  - Kostić, Aleksandar
AU  - Barać, Miroljub
PY  - 2020
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5313
AB  - The influence of simulated in vitro digestion on antioxidant potential of protein fractions of traditional Serbian white-brined cheeses was investigated. Water-soluble (WSF) and water-insoluble fractions (WINF) of three cow's and three ovine white-brined cheeses were fractionated. Total antioxidant capacity, reducing power and iron (II) chelating properties of these fractions before and after in vitro digestion were assayed. The investigated protein fractions had different antioxidant properties. WSFs had a better total antioxidant capacity and reducing power and less pronounced iron (II) chelating properties than WINFs. A strong negative correlation (-0.818, P lt 0.05) between the total antioxidant capacities of undigested WSF and WINF of traditional cheeses were observed. In vitro digestion greatly improved the total antioxidant capacities of WINFs (by 16.61-34.18 times), their reducing power (up to 95.77 %) and except in the case of Svrljig ovine cheese, the iron (II) chelating ability as well. A less pronounced increase (up to 7129 %) of the total antioxidant capacity of WSFs was induced by in vitro digestion. In vitro digestion reduced reducing power of WSF of investigated ovine cheeses as well as reducing power of WSF of Homolje cow's cheese. Since there was no significant correlation between the investigated antioxidant properties of digested WSFs and their free amino acids and mineral contents the observed differences should be attributed to different composition and properties of low molecular weight peptides. Thus, further investigations related to their isolation and characterization needs to be conducted. However, these results indicate that Serbian white-brined cheeses have great potential as source of antioxidant peptides.
PB  - Croatian Dairy Union, Zagreb
T2  - Mljekarstvo
T1  - The effect of in vitro digestion on antioxidant properties of water-soluble and insoluble protein fractions of traditional Serbian white- brined cheeses
EP  - 265
IS  - 4
SP  - 253
VL  - 70
DO  - 10.15567/mljekarstvo.2020.0403
ER  - 

@article{
author = "Vučić, Tanja and Milincić, Danijel D. and Žilić, Sladjana and Sredović-Ignjatović, Ivana and Sarić, Zlatan and Ećim-Djurić, Olivera and Kostić, Aleksandar and Barać, Miroljub",
year = "2020",
abstract = "The influence of simulated in vitro digestion on antioxidant potential of protein fractions of traditional Serbian white-brined cheeses was investigated. Water-soluble (WSF) and water-insoluble fractions (WINF) of three cow's and three ovine white-brined cheeses were fractionated. Total antioxidant capacity, reducing power and iron (II) chelating properties of these fractions before and after in vitro digestion were assayed. The investigated protein fractions had different antioxidant properties. WSFs had a better total antioxidant capacity and reducing power and less pronounced iron (II) chelating properties than WINFs. A strong negative correlation (-0.818, P lt 0.05) between the total antioxidant capacities of undigested WSF and WINF of traditional cheeses were observed. In vitro digestion greatly improved the total antioxidant capacities of WINFs (by 16.61-34.18 times), their reducing power (up to 95.77 %) and except in the case of Svrljig ovine cheese, the iron (II) chelating ability as well. A less pronounced increase (up to 7129 %) of the total antioxidant capacity of WSFs was induced by in vitro digestion. In vitro digestion reduced reducing power of WSF of investigated ovine cheeses as well as reducing power of WSF of Homolje cow's cheese. Since there was no significant correlation between the investigated antioxidant properties of digested WSFs and their free amino acids and mineral contents the observed differences should be attributed to different composition and properties of low molecular weight peptides. Thus, further investigations related to their isolation and characterization needs to be conducted. However, these results indicate that Serbian white-brined cheeses have great potential as source of antioxidant peptides.",
publisher = "Croatian Dairy Union, Zagreb",
journal = "Mljekarstvo",
title = "The effect of in vitro digestion on antioxidant properties of water-soluble and insoluble protein fractions of traditional Serbian white- brined cheeses",
pages = "265-253",
number = "4",
volume = "70",
doi = "10.15567/mljekarstvo.2020.0403"
}

Vučić, T., Milincić, D. D., Žilić, S., Sredović-Ignjatović, I., Sarić, Z., Ećim-Djurić, O., Kostić, A.,& Barać, M.. (2020). The effect of in vitro digestion on antioxidant properties of water-soluble and insoluble protein fractions of traditional Serbian white- brined cheeses. in Mljekarstvo
Croatian Dairy Union, Zagreb., 70(4), 253-265.
https://doi.org/10.15567/mljekarstvo.2020.0403

Vučić T, Milincić DD, Žilić S, Sredović-Ignjatović I, Sarić Z, Ećim-Djurić O, Kostić A, Barać M. The effect of in vitro digestion on antioxidant properties of water-soluble and insoluble protein fractions of traditional Serbian white- brined cheeses. in Mljekarstvo. 2020;70(4):253-265.
doi:10.15567/mljekarstvo.2020.0403 .

Vučić, Tanja, Milincić, Danijel D., Žilić, Sladjana, Sredović-Ignjatović, Ivana, Sarić, Zlatan, Ećim-Djurić, Olivera, Kostić, Aleksandar, Barać, Miroljub, "The effect of in vitro digestion on antioxidant properties of water-soluble and insoluble protein fractions of traditional Serbian white- brined cheeses" in Mljekarstvo, 70, no. 4 (2020):253-265,
https://doi.org/10.15567/mljekarstvo.2020.0403 . .

TY  - JOUR
AU  - Oljača, Mićo V.
AU  - Pajić, Miloš
AU  - Gligorević, Kosta
AU  - Dražić, Milan
AU  - Zlatanović, Ivan
AU  - Dimitrijević, Aleksandra
AU  - Miodragović, Rajko
AU  - Mileusnić, Zoran
AU  - Radojević, Rade
AU  - Živković, Milovan
AU  - Petrović, Dragan
AU  - Radivojević, Dušan
AU  - Urošević, Mirko
AU  - Topisirović, Goran
AU  - Radičević, Branko
AU  - Ećim, Olivera
AU  - Balać, Nebojša
PY  - 2018
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4863
AB  - The paper analyzes the possibility and the needs for the use of specific types of robots (mini unmanned aircraft with different designs and the designation of UAVs) and the possibility of using in agriculture (agrodrone). The year 2015 was proclaimed (Fortune Magazine, 2016) as the year of increasing and widespread use of UAVs in various areas of human activity, especially in agriculture and forestry (75% of use). This is important for large farm areas, where UAV has many useful functions and a very cost-effective commercial application. Today, the needs for UAVs have increased sharply with various opportunities for both civilian and military needs. There is also a significant interest in the development of new drones that can autonomously fly in different environments and locations and can perform various missions and tasks. Over the past decade, a wide range of applications for drones has gained the significance that led to the discovery of various types of unmanned UAVs of different sizes and weights. In this review, the classification of UAVs ranging based on a detailed overview of the development of the drone industry in recent years, this paper demonstrates the evolution of drones and differents application technologies. Of course, this development is very advanced and revolutionary, as well as the development of mobile and smart phones and the Internet, which will open the way for many users to participate in defining the future of UAV implementation. LIVONA Company, Belgrade, Serbia (and Institute of Agricultural Engineering, Faculty of Agriculture in Belgrade, in tehnical cooperation) has a study and plans on the implementation of the model micro drone EBee SQ Livona RTK in the future general plans for inspection of protection Soils of territory Minicipality of Stara Pazova (351 km2), and agricultural company Napredak, and exspecially plans for soils of agriculture of R. Serbia. VEKOM GeoCompany from Belgrade, (in cooperation with Institute of Agricultural Engineering, Faculty of Agriculture in Belgrade), has a study and plans on the implementation of the model of the drone Aibot KX6 model, in the future of application of agricultural soils of region Open pit Kolubara for area from app. 600 km2 and the other soils of Region). Institute of Agricultural Engineering, Faculty of Agriculture in Belgrade, in cooperation with Municipality of Ub, has a study and plans on the implementation of the model micro drone Hubsan H109S X4 PRO in the future plans general inspection of protection Soils and Waters of territory of Municipality Ub (456 km2).
AB  - U radu su analizirane mogućnosti i potrebe upotrebe specifičnih vrsta robota (mini bespilotnih letelica sa različitim dizajnom, o značane kao UAV) i način korištenja u poljoprivredi (agrodron). Časopis Fortune je 2015.godinu proglasio kao godinu sve većeg i široko rasprostranjene upotrbe UAV letelica, u različitim oblastima ljudske delatnosti, posebno u poljoprivredi i šumarstvu (75% upotrebe). Ovo je naročito važno za velike farme i oblasti pod šumama, gde UAV ima mnogo korisnih funkcija i veoma isplative komercijalne aplikacije. Danas, potrebe za UAV imaju nagli porast sa različitim mogućnostima kako za civilne tako i za vojne potrebe. Takođe postoji značajan interes za razvoj novih bespilotnih letelica koji mogu autonomno leteti u različitim okruženjima i lokacijama i obaviti različite misije i zadatke. Tokom protekle decenije XXI veka, širok spektar aplikacija za bespilotne letelice je dobio značaj koji je doveo do konstrukcija različitih tipova bespilotnih UAV, različitih veličina i težina i svakako namene. Naravno , tehnološki razvoj kod dron sistema je veoma tehničko -tehnološki napredan i revolucionaran, uz razvoj mobilnih i pametnih (android) telefona i interneta, brzo otvora puteve i mogućnosti za mnoge korisnike u definisanju nove budućnosti implementacije UAV različitim oblastima primene. Kompanija Livona d.o.o., Beograd i Institut za poljoprivrednu tehniku, Poljoprivredni fakultet u Beogradu, u tehničkoj saradnji imaju planove o implementaciji modela mikro drona EBee SK Livona RTK u narednim generalnim planovima za inspekciju, zaštitu i korišćenje poljoprivrednih zemljišta Republike Srbije, i posebno teritorije Opštine Stara Pazova (351 km2), gde je posebno mesto poljoprivrednog preduzeća Napredak a.d. VekomGeo d.o.o, Beograd u saradnji sa Institutom za poljoprivrednu tehniku Poljoprivrednog fakulteta u Beogradu ima planove o budućoj upotrebi drona model Aibot X6, za nadzor na površinama od 600 km2 (i poljoprivredna zemljišta) otvorenog kopa R.B. Kolubara ili drugih objekata. Institut za poljoprivrednu tehniku, Poljoprivredni fakultet u Beogradu, ima planove o saradnji sa opštino m Ub, zbog upotrebe modela mikro drona Hubsan H109S Ks4 PRO u inspekciji oko zaštite i načina korišćenja zemljišta i vo da na ovoj teritoriji (456 km2).
PB  - Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd
T2  - Poljoprivredna tehnika
T1  - Design, classification, perspectives and possible applications drones in agriculture of Serbia
T1  - Dizajn, klasifikacija, perspektiva i moguća aplikacija dronova u poljoprivredu Srbije
EP  - 56
IS  - 4
SP  - 29
VL  - 43
DO  - 10.5937/PoljTeh1804029O
ER  - 

@article{
author = "Oljača, Mićo V. and Pajić, Miloš and Gligorević, Kosta and Dražić, Milan and Zlatanović, Ivan and Dimitrijević, Aleksandra and Miodragović, Rajko and Mileusnić, Zoran and Radojević, Rade and Živković, Milovan and Petrović, Dragan and Radivojević, Dušan and Urošević, Mirko and Topisirović, Goran and Radičević, Branko and Ećim, Olivera and Balać, Nebojša",
year = "2018",
abstract = "The paper analyzes the possibility and the needs for the use of specific types of robots (mini unmanned aircraft with different designs and the designation of UAVs) and the possibility of using in agriculture (agrodrone). The year 2015 was proclaimed (Fortune Magazine, 2016) as the year of increasing and widespread use of UAVs in various areas of human activity, especially in agriculture and forestry (75% of use). This is important for large farm areas, where UAV has many useful functions and a very cost-effective commercial application. Today, the needs for UAVs have increased sharply with various opportunities for both civilian and military needs. There is also a significant interest in the development of new drones that can autonomously fly in different environments and locations and can perform various missions and tasks. Over the past decade, a wide range of applications for drones has gained the significance that led to the discovery of various types of unmanned UAVs of different sizes and weights. In this review, the classification of UAVs ranging based on a detailed overview of the development of the drone industry in recent years, this paper demonstrates the evolution of drones and differents application technologies. Of course, this development is very advanced and revolutionary, as well as the development of mobile and smart phones and the Internet, which will open the way for many users to participate in defining the future of UAV implementation. LIVONA Company, Belgrade, Serbia (and Institute of Agricultural Engineering, Faculty of Agriculture in Belgrade, in tehnical cooperation) has a study and plans on the implementation of the model micro drone EBee SQ Livona RTK in the future general plans for inspection of protection Soils of territory Minicipality of Stara Pazova (351 km2), and agricultural company Napredak, and exspecially plans for soils of agriculture of R. Serbia. VEKOM GeoCompany from Belgrade, (in cooperation with Institute of Agricultural Engineering, Faculty of Agriculture in Belgrade), has a study and plans on the implementation of the model of the drone Aibot KX6 model, in the future of application of agricultural soils of region Open pit Kolubara for area from app. 600 km2 and the other soils of Region). Institute of Agricultural Engineering, Faculty of Agriculture in Belgrade, in cooperation with Municipality of Ub, has a study and plans on the implementation of the model micro drone Hubsan H109S X4 PRO in the future plans general inspection of protection Soils and Waters of territory of Municipality Ub (456 km2)., U radu su analizirane mogućnosti i potrebe upotrebe specifičnih vrsta robota (mini bespilotnih letelica sa različitim dizajnom, o značane kao UAV) i način korištenja u poljoprivredi (agrodron). Časopis Fortune je 2015.godinu proglasio kao godinu sve većeg i široko rasprostranjene upotrbe UAV letelica, u različitim oblastima ljudske delatnosti, posebno u poljoprivredi i šumarstvu (75% upotrebe). Ovo je naročito važno za velike farme i oblasti pod šumama, gde UAV ima mnogo korisnih funkcija i veoma isplative komercijalne aplikacije. Danas, potrebe za UAV imaju nagli porast sa različitim mogućnostima kako za civilne tako i za vojne potrebe. Takođe postoji značajan interes za razvoj novih bespilotnih letelica koji mogu autonomno leteti u različitim okruženjima i lokacijama i obaviti različite misije i zadatke. Tokom protekle decenije XXI veka, širok spektar aplikacija za bespilotne letelice je dobio značaj koji je doveo do konstrukcija različitih tipova bespilotnih UAV, različitih veličina i težina i svakako namene. Naravno , tehnološki razvoj kod dron sistema je veoma tehničko -tehnološki napredan i revolucionaran, uz razvoj mobilnih i pametnih (android) telefona i interneta, brzo otvora puteve i mogućnosti za mnoge korisnike u definisanju nove budućnosti implementacije UAV različitim oblastima primene. Kompanija Livona d.o.o., Beograd i Institut za poljoprivrednu tehniku, Poljoprivredni fakultet u Beogradu, u tehničkoj saradnji imaju planove o implementaciji modela mikro drona EBee SK Livona RTK u narednim generalnim planovima za inspekciju, zaštitu i korišćenje poljoprivrednih zemljišta Republike Srbije, i posebno teritorije Opštine Stara Pazova (351 km2), gde je posebno mesto poljoprivrednog preduzeća Napredak a.d. VekomGeo d.o.o, Beograd u saradnji sa Institutom za poljoprivrednu tehniku Poljoprivrednog fakulteta u Beogradu ima planove o budućoj upotrebi drona model Aibot X6, za nadzor na površinama od 600 km2 (i poljoprivredna zemljišta) otvorenog kopa R.B. Kolubara ili drugih objekata. Institut za poljoprivrednu tehniku, Poljoprivredni fakultet u Beogradu, ima planove o saradnji sa opštino m Ub, zbog upotrebe modela mikro drona Hubsan H109S Ks4 PRO u inspekciji oko zaštite i načina korišćenja zemljišta i vo da na ovoj teritoriji (456 km2).",
publisher = "Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd",
journal = "Poljoprivredna tehnika",
title = "Design, classification, perspectives and possible applications drones in agriculture of Serbia, Dizajn, klasifikacija, perspektiva i moguća aplikacija dronova u poljoprivredu Srbije",
pages = "56-29",
number = "4",
volume = "43",
doi = "10.5937/PoljTeh1804029O"
}

Oljača, M. V., Pajić, M., Gligorević, K., Dražić, M., Zlatanović, I., Dimitrijević, A., Miodragović, R., Mileusnić, Z., Radojević, R., Živković, M., Petrović, D., Radivojević, D., Urošević, M., Topisirović, G., Radičević, B., Ećim, O.,& Balać, N.. (2018). Design, classification, perspectives and possible applications drones in agriculture of Serbia. in Poljoprivredna tehnika
Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd., 43(4), 29-56.
https://doi.org/10.5937/PoljTeh1804029O

Oljača MV, Pajić M, Gligorević K, Dražić M, Zlatanović I, Dimitrijević A, Miodragović R, Mileusnić Z, Radojević R, Živković M, Petrović D, Radivojević D, Urošević M, Topisirović G, Radičević B, Ećim O, Balać N. Design, classification, perspectives and possible applications drones in agriculture of Serbia. in Poljoprivredna tehnika. 2018;43(4):29-56.
doi:10.5937/PoljTeh1804029O .

Oljača, Mićo V., Pajić, Miloš, Gligorević, Kosta, Dražić, Milan, Zlatanović, Ivan, Dimitrijević, Aleksandra, Miodragović, Rajko, Mileusnić, Zoran, Radojević, Rade, Živković, Milovan, Petrović, Dragan, Radivojević, Dušan, Urošević, Mirko, Topisirović, Goran, Radičević, Branko, Ećim, Olivera, Balać, Nebojša, "Design, classification, perspectives and possible applications drones in agriculture of Serbia" in Poljoprivredna tehnika, 43, no. 4 (2018):29-56,
https://doi.org/10.5937/PoljTeh1804029O . .

TY  - JOUR
AU  - Mijailović, I.
AU  - Radojičić, Vesna
AU  - Ećim-Djurić, Olivera
AU  - Stefanović, G.
AU  - Kulić, Gordana
PY  - 2014
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3501
AB  - Most of the recent studies, performed in order to estimate the potential value of biomass for energy production, were done on common biomass resources such as corn, wheat, sunflower, barley and oats. Although tobacco stalks are rarely or almost not used for this purpose, according to their chemical composition and heating value, they can be classified as non-toxic agricultural waste, which makes them a renewable energy source. According to the statistics in agricultural production, Serbia has a great potential in tobacco stalks which are treated as agricultural waste and they are not used for energetic purposes. This paper deals with two common types of large leaves tobacco stalks in this region; Virginia and Burley, as a potential renewable energy source. The heating values were calculated according to the elemental chemical composition and lignin content, and compared with other known agricultural waste. Various equations for high heating value calculation were taken in account in order to present tobacco stalks as renewable energy source. Results of analysis showed good agreement of tobacco stalks heating values in comparison with other crops, and does not deviate significantly from other agricultural waste.
PB  - Scibulcom Ltd.
T2  - Journal of Environmental Protection and Ecology
T1  - Energy potential of tobacco stalks in briquettes and pellets production
EP  - 1041
IS  - 3
SP  - 1034
VL  - 15
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_3501
ER  - 

@article{
author = "Mijailović, I. and Radojičić, Vesna and Ećim-Djurić, Olivera and Stefanović, G. and Kulić, Gordana",
year = "2014",
abstract = "Most of the recent studies, performed in order to estimate the potential value of biomass for energy production, were done on common biomass resources such as corn, wheat, sunflower, barley and oats. Although tobacco stalks are rarely or almost not used for this purpose, according to their chemical composition and heating value, they can be classified as non-toxic agricultural waste, which makes them a renewable energy source. According to the statistics in agricultural production, Serbia has a great potential in tobacco stalks which are treated as agricultural waste and they are not used for energetic purposes. This paper deals with two common types of large leaves tobacco stalks in this region; Virginia and Burley, as a potential renewable energy source. The heating values were calculated according to the elemental chemical composition and lignin content, and compared with other known agricultural waste. Various equations for high heating value calculation were taken in account in order to present tobacco stalks as renewable energy source. Results of analysis showed good agreement of tobacco stalks heating values in comparison with other crops, and does not deviate significantly from other agricultural waste.",
publisher = "Scibulcom Ltd.",
journal = "Journal of Environmental Protection and Ecology",
title = "Energy potential of tobacco stalks in briquettes and pellets production",
pages = "1041-1034",
number = "3",
volume = "15",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_3501"
}

Mijailović, I., Radojičić, V., Ećim-Djurić, O., Stefanović, G.,& Kulić, G.. (2014). Energy potential of tobacco stalks in briquettes and pellets production. in Journal of Environmental Protection and Ecology
Scibulcom Ltd.., 15(3), 1034-1041.
https://hdl.handle.net/21.15107/rcub_agrospace_3501

Mijailović I, Radojičić V, Ećim-Djurić O, Stefanović G, Kulić G. Energy potential of tobacco stalks in briquettes and pellets production. in Journal of Environmental Protection and Ecology. 2014;15(3):1034-1041.
https://hdl.handle.net/21.15107/rcub_agrospace_3501 .

Mijailović, I., Radojičić, Vesna, Ećim-Djurić, Olivera, Stefanović, G., Kulić, Gordana, "Energy potential of tobacco stalks in briquettes and pellets production" in Journal of Environmental Protection and Ecology, 15, no. 3 (2014):1034-1041,
https://hdl.handle.net/21.15107/rcub_agrospace_3501 .

TY  - JOUR
AU  - Brkić, Miladin
AU  - Janjić, Toša
AU  - Ećim-Djurić, Olivera
PY  - 2013
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3357
AB  - The paper discusses the state of the process technique, thermo and power equipment in Serbia. Data were collected on the basis of the statistical census of agriculture, literature sources, and existing documentation chambers. Based on these data, it was found that age and amortization process and the process technique, thermo equipment is very high. The age by driers and silos in the public and privatized sector is an average of over 25 years. Therefore, the planned annual demand for the restoration of these devices are reduced in comparison to the real needs, mainly due to lack of funds. The table 1 lists the specific data of numerical state of individual equipment in 2012/2013th year and needs per year for period from 2014th to 2020th year. Increased the number of grain silos and metal cell storage of cereal grains and oilseeds in the private possession of medium size. Increased interest in vegetable production in greenhouses, and with it the growing interest in climatisation of air space. Also, the increased interest in building facilities for processing and cooling of fruits and vegetables. The analysis of the structure and the necessary processing equipment, it can be concluded that it is still necessary to import special processing and thermo equipment. It is at this point out that the domestic industry for process and thermo equipment sufficiently qualified to produce simpler processing devices and thermo equipment for domestic needs and for export. .
AB  - U radu je razmatrano stanje procesne, termotehničke i energetske opreme u Srbiji. Podaci su prikupljani na osnovu statističkog popisa u poljoprivredi, literaturnih izvora i postojeće dokumentacije privrednih komora. Na osnovu ovih podataka ustanovljeno je da starost i amortizovanost procesne i termotehničke opreme je vrlo velika. Kod sušara i silosa u društvenom i privatizovanom sektoru ona u proseku iznosi preko 25 godina. Zbog toga planirane godišnje potrebe za obnovu ovih uređaja su smanjene u odnosu na stvarne potrebe, uglavnom zbog nedostatka sredstava. U tabeli su navedeni konkretni podaci brojčanog stanja pojedine opreme u 2012/2013. godini i godišnje potrebe za period od 2014. do 2020. godine. Povećao se broj sušara za zrno i metalnih silosnih ćelija za skladištenje zrna žitarica i uljarica na privatnom posedu srednje veličine. Povećan je interes za povrtarsku proizvodnju u zaštićenom prostoru, a s tim i raste interes za klimatizaciju prostora. Takođe, povećan je interes za izgradnju objekata za doradu i hlađenje voća i povrća. Na osnovu analize stanja i strukture potrebne procesne opreme, može da se konstatuje da je potrebno još uvek uvoziti specijalnu procesnu i termotehničku opremu. Neophodno je pri tom naglasiti da je domaća industrija procesne i termotehničke opreme dovoljno osposobljena da samostalno proizvodi jednostavnije procesne uređaje i termotehničku opremu za domaće potrebe i za izvoz. .
PB  - Naučno društvo za pogonske mašine, traktore i održavanje, Novi Sad i Univerzitet u Novom Sadu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Novi Sad
T2  - Traktori i pogonske mašine
T1  - Process techniques and thermotechnics: State and needs
T1  - Procesna tehnika i termotehnika - stanje i potrebe
EP  - 85
IS  - 1
SP  - 79
VL  - 18
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_3357
ER  - 

@article{
author = "Brkić, Miladin and Janjić, Toša and Ećim-Djurić, Olivera",
year = "2013",
abstract = "The paper discusses the state of the process technique, thermo and power equipment in Serbia. Data were collected on the basis of the statistical census of agriculture, literature sources, and existing documentation chambers. Based on these data, it was found that age and amortization process and the process technique, thermo equipment is very high. The age by driers and silos in the public and privatized sector is an average of over 25 years. Therefore, the planned annual demand for the restoration of these devices are reduced in comparison to the real needs, mainly due to lack of funds. The table 1 lists the specific data of numerical state of individual equipment in 2012/2013th year and needs per year for period from 2014th to 2020th year. Increased the number of grain silos and metal cell storage of cereal grains and oilseeds in the private possession of medium size. Increased interest in vegetable production in greenhouses, and with it the growing interest in climatisation of air space. Also, the increased interest in building facilities for processing and cooling of fruits and vegetables. The analysis of the structure and the necessary processing equipment, it can be concluded that it is still necessary to import special processing and thermo equipment. It is at this point out that the domestic industry for process and thermo equipment sufficiently qualified to produce simpler processing devices and thermo equipment for domestic needs and for export. ., U radu je razmatrano stanje procesne, termotehničke i energetske opreme u Srbiji. Podaci su prikupljani na osnovu statističkog popisa u poljoprivredi, literaturnih izvora i postojeće dokumentacije privrednih komora. Na osnovu ovih podataka ustanovljeno je da starost i amortizovanost procesne i termotehničke opreme je vrlo velika. Kod sušara i silosa u društvenom i privatizovanom sektoru ona u proseku iznosi preko 25 godina. Zbog toga planirane godišnje potrebe za obnovu ovih uređaja su smanjene u odnosu na stvarne potrebe, uglavnom zbog nedostatka sredstava. U tabeli su navedeni konkretni podaci brojčanog stanja pojedine opreme u 2012/2013. godini i godišnje potrebe za period od 2014. do 2020. godine. Povećao se broj sušara za zrno i metalnih silosnih ćelija za skladištenje zrna žitarica i uljarica na privatnom posedu srednje veličine. Povećan je interes za povrtarsku proizvodnju u zaštićenom prostoru, a s tim i raste interes za klimatizaciju prostora. Takođe, povećan je interes za izgradnju objekata za doradu i hlađenje voća i povrća. Na osnovu analize stanja i strukture potrebne procesne opreme, može da se konstatuje da je potrebno još uvek uvoziti specijalnu procesnu i termotehničku opremu. Neophodno je pri tom naglasiti da je domaća industrija procesne i termotehničke opreme dovoljno osposobljena da samostalno proizvodi jednostavnije procesne uređaje i termotehničku opremu za domaće potrebe i za izvoz. .",
publisher = "Naučno društvo za pogonske mašine, traktore i održavanje, Novi Sad i Univerzitet u Novom Sadu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Novi Sad",
journal = "Traktori i pogonske mašine",
title = "Process techniques and thermotechnics: State and needs, Procesna tehnika i termotehnika - stanje i potrebe",
pages = "85-79",
number = "1",
volume = "18",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_3357"
}

Brkić, M., Janjić, T.,& Ećim-Djurić, O.. (2013). Process techniques and thermotechnics: State and needs. in Traktori i pogonske mašine
Naučno društvo za pogonske mašine, traktore i održavanje, Novi Sad i Univerzitet u Novom Sadu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Novi Sad., 18(1), 79-85.
https://hdl.handle.net/21.15107/rcub_agrospace_3357

Brkić M, Janjić T, Ećim-Djurić O. Process techniques and thermotechnics: State and needs. in Traktori i pogonske mašine. 2013;18(1):79-85.
https://hdl.handle.net/21.15107/rcub_agrospace_3357 .

Brkić, Miladin, Janjić, Toša, Ećim-Djurić, Olivera, "Process techniques and thermotechnics: State and needs" in Traktori i pogonske mašine, 18, no. 1 (2013):79-85,
https://hdl.handle.net/21.15107/rcub_agrospace_3357 .

TY  - JOUR
AU  - Kavgić, M.
AU  - Mumović, D.
AU  - Summerfield, A.
AU  - Stevanović, Z.
AU  - Ećim-Djurić, Olivera
PY  - 2013
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3282
AB  - This paper presents the development and evaluation of the Belgrade Domestic Energy Model (BEDEM) for predicting the energy consumption and carbon dioxide (CO2) emissions of the existing housing stock. The distribution of energy use in relation to the end use is estimated as: space heating, 71%; light and appliances, 15%; water heating, 9%; and cooking 5%, while the distribution of CO2 emissions is space heating, 59%; light and appliances, 22%; water heating, 13%; and cooking 6%. Local sensitivity analysis is carried out for dwellings of different type and year built, and the largest normalized sensitivity coefficients were calculated for parameters which almost exclusively influence space heating energy consumption in housing. For all input parameters under investigation, the effects of the input uncertainty were linear for a moderate range of input change (Delta x=+/- 10%) and superposable for a small range of input change (Delta x=+/- 1%). However, the non-linear and non-additive properties of some input parameters over the wider range hinder the development of a simple but reliable model for estimating energy and CO2 reductions. The findings show that the uncertainty in the stock models predictions can be large and more work is needed in the area of the predictive uncertainty of stock models.
PB  - Elsevier Science Sa, Lausanne
T2  - Energy and Buildings
T1  - Uncertainty and modeling energy consumption: Sensitivity analysis for a city-scale domestic energy model
EP  - 11
SP  - 1
VL  - 60
DO  - 10.1016/j.enbuild.2013.01.005
ER  - 

@article{
author = "Kavgić, M. and Mumović, D. and Summerfield, A. and Stevanović, Z. and Ećim-Djurić, Olivera",
year = "2013",
abstract = "This paper presents the development and evaluation of the Belgrade Domestic Energy Model (BEDEM) for predicting the energy consumption and carbon dioxide (CO2) emissions of the existing housing stock. The distribution of energy use in relation to the end use is estimated as: space heating, 71%; light and appliances, 15%; water heating, 9%; and cooking 5%, while the distribution of CO2 emissions is space heating, 59%; light and appliances, 22%; water heating, 13%; and cooking 6%. Local sensitivity analysis is carried out for dwellings of different type and year built, and the largest normalized sensitivity coefficients were calculated for parameters which almost exclusively influence space heating energy consumption in housing. For all input parameters under investigation, the effects of the input uncertainty were linear for a moderate range of input change (Delta x=+/- 10%) and superposable for a small range of input change (Delta x=+/- 1%). However, the non-linear and non-additive properties of some input parameters over the wider range hinder the development of a simple but reliable model for estimating energy and CO2 reductions. The findings show that the uncertainty in the stock models predictions can be large and more work is needed in the area of the predictive uncertainty of stock models.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Energy and Buildings",
title = "Uncertainty and modeling energy consumption: Sensitivity analysis for a city-scale domestic energy model",
pages = "11-1",
volume = "60",
doi = "10.1016/j.enbuild.2013.01.005"
}

Kavgić, M., Mumović, D., Summerfield, A., Stevanović, Z.,& Ećim-Djurić, O.. (2013). Uncertainty and modeling energy consumption: Sensitivity analysis for a city-scale domestic energy model. in Energy and Buildings
Elsevier Science Sa, Lausanne., 60, 1-11.
https://doi.org/10.1016/j.enbuild.2013.01.005

Kavgić M, Mumović D, Summerfield A, Stevanović Z, Ećim-Djurić O. Uncertainty and modeling energy consumption: Sensitivity analysis for a city-scale domestic energy model. in Energy and Buildings. 2013;60:1-11.
doi:10.1016/j.enbuild.2013.01.005 .

Kavgić, M., Mumović, D., Summerfield, A., Stevanović, Z., Ećim-Djurić, Olivera, "Uncertainty and modeling energy consumption: Sensitivity analysis for a city-scale domestic energy model" in Energy and Buildings, 60 (2013):1-11,
https://doi.org/10.1016/j.enbuild.2013.01.005 . .

TY  - JOUR
AU  - Milanović, Predrag
AU  - Ećim, Olivera
AU  - Jelić, Miloš B.
AU  - Tomić, Vojislav V.
AU  - Milanoviće, Mihailo P.
PY  - 2012
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3013
AB  - This paper analyzes a greenhouse heating system using geothermal energy and storage tank and the possibility of utilization of insufficient amount of heat from geothermal sources during the periods with low outside air temperatures. Crucial for these analyses is modelling of the necessary yearly energy requirements for greenhouse heating. The results of these analyses enable calculation of an appropriate storage tank capacity so that the energy efficiency of greenhouse heating system with geothermal energy could be significantly improved.
PB  - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
T2  - Thermal Science
T1  - Dynamic modeling of a heating system using geothermal energy and storage tank
EP  - 953
IS  - 3
SP  - 947
VL  - 16
DO  - 10.2298/TSCI120222138M
ER  - 

@article{
author = "Milanović, Predrag and Ećim, Olivera and Jelić, Miloš B. and Tomić, Vojislav V. and Milanoviće, Mihailo P.",
year = "2012",
abstract = "This paper analyzes a greenhouse heating system using geothermal energy and storage tank and the possibility of utilization of insufficient amount of heat from geothermal sources during the periods with low outside air temperatures. Crucial for these analyses is modelling of the necessary yearly energy requirements for greenhouse heating. The results of these analyses enable calculation of an appropriate storage tank capacity so that the energy efficiency of greenhouse heating system with geothermal energy could be significantly improved.",
publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd",
journal = "Thermal Science",
title = "Dynamic modeling of a heating system using geothermal energy and storage tank",
pages = "953-947",
number = "3",
volume = "16",
doi = "10.2298/TSCI120222138M"
}

Milanović, P., Ećim, O., Jelić, M. B., Tomić, V. V.,& Milanoviće, M. P.. (2012). Dynamic modeling of a heating system using geothermal energy and storage tank. in Thermal Science
Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 16(3), 947-953.
https://doi.org/10.2298/TSCI120222138M

Milanović P, Ećim O, Jelić MB, Tomić VV, Milanoviće MP. Dynamic modeling of a heating system using geothermal energy and storage tank. in Thermal Science. 2012;16(3):947-953.
doi:10.2298/TSCI120222138M .

Milanović, Predrag, Ećim, Olivera, Jelić, Miloš B., Tomić, Vojislav V., Milanoviće, Mihailo P., "Dynamic modeling of a heating system using geothermal energy and storage tank" in Thermal Science, 16, no. 3 (2012):947-953,
https://doi.org/10.2298/TSCI120222138M . .

TY  - JOUR
AU  - Živković, Milovan
AU  - Ećim-Djurić, Olivera
AU  - Topisirović, Goran
PY  - 2011
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2531
AB  - The presented study is to develop a mathematical model of convective drying of plums in the prototype dryer, in order to apply the developed model to other similar types of fruit. Since the dried plums are one of the traditional dried products of many regions in Serbia, this is the main reason for selecting the analysis. A mathematical model of drying plums is based on the fundamental laws of mass and heat transfer. Along with the development of mathematical models, experimental measurements were carried out during drying plum in the prototype dryer and then the results were compared for validation. Three models were carried out, in the range of drying temperatures of 45ºC to 73ºC. Two drying models were divided in several phases (heating, hypothermia and drying), and one model had only one phase of drying. By comparing the data obtained by numerical simulation and experimental data, it can be concluded that the mathematical model is successfully developed.
AB  - Predmet studije je razvoj matematičkog modela konvektivnog sušenja šljive u prototipskoj sušari, sa ciljem da se razvijeni model može primeniti na ostale slične vrste voća. S obzirom da je sušenja šljiva jedan od tradicionalnih sušenih proizvoda ovog regiona, to je bio glavni razlog odabira za analizu. Matematički model sušenja šljive bazira se na osnovnim zakonima prenosa mase i toplote. Uporedo sa razvojem matematičkog modela, vršena su eksperimentalna merenja tokom sušenja šljive u prototipskoj sušari, a zatim su poređeni rezultati u cilju validacije. Vršena su tri testa sušenja u opsegu temperatura od 45ºC do 73ºC. Eksperimentalni deo ispitavanja podeljen je u tri režima sušenja sa po više faza (zagrevanje, pothlađivanje i sušenje). Poređenjem podataka dobijenih numeričkom simulacijom i podataka dobijenih iz eksperimenta, može se zaključiti da je matematički model uspešno razvijen.
PB  - Nacionalno naučno društvo za poljoprivrednu tehniku, Novi Sad
T2  - Savremena poljoprivredna tehnika
T1  - Numerical simulation of plum drying mathematical model
T1  - Numerička simulacija matematičkog modela sušenja šljive
EP  - 244
IS  - 3
SP  - 235
VL  - 37
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_2531
ER  - 

@article{
author = "Živković, Milovan and Ećim-Djurić, Olivera and Topisirović, Goran",
year = "2011",
abstract = "The presented study is to develop a mathematical model of convective drying of plums in the prototype dryer, in order to apply the developed model to other similar types of fruit. Since the dried plums are one of the traditional dried products of many regions in Serbia, this is the main reason for selecting the analysis. A mathematical model of drying plums is based on the fundamental laws of mass and heat transfer. Along with the development of mathematical models, experimental measurements were carried out during drying plum in the prototype dryer and then the results were compared for validation. Three models were carried out, in the range of drying temperatures of 45ºC to 73ºC. Two drying models were divided in several phases (heating, hypothermia and drying), and one model had only one phase of drying. By comparing the data obtained by numerical simulation and experimental data, it can be concluded that the mathematical model is successfully developed., Predmet studije je razvoj matematičkog modela konvektivnog sušenja šljive u prototipskoj sušari, sa ciljem da se razvijeni model može primeniti na ostale slične vrste voća. S obzirom da je sušenja šljiva jedan od tradicionalnih sušenih proizvoda ovog regiona, to je bio glavni razlog odabira za analizu. Matematički model sušenja šljive bazira se na osnovnim zakonima prenosa mase i toplote. Uporedo sa razvojem matematičkog modela, vršena su eksperimentalna merenja tokom sušenja šljive u prototipskoj sušari, a zatim su poređeni rezultati u cilju validacije. Vršena su tri testa sušenja u opsegu temperatura od 45ºC do 73ºC. Eksperimentalni deo ispitavanja podeljen je u tri režima sušenja sa po više faza (zagrevanje, pothlađivanje i sušenje). Poređenjem podataka dobijenih numeričkom simulacijom i podataka dobijenih iz eksperimenta, može se zaključiti da je matematički model uspešno razvijen.",
publisher = "Nacionalno naučno društvo za poljoprivrednu tehniku, Novi Sad",
journal = "Savremena poljoprivredna tehnika",
title = "Numerical simulation of plum drying mathematical model, Numerička simulacija matematičkog modela sušenja šljive",
pages = "244-235",
number = "3",
volume = "37",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_2531"
}

Živković, M., Ećim-Djurić, O.,& Topisirović, G.. (2011). Numerical simulation of plum drying mathematical model. in Savremena poljoprivredna tehnika
Nacionalno naučno društvo za poljoprivrednu tehniku, Novi Sad., 37(3), 235-244.
https://hdl.handle.net/21.15107/rcub_agrospace_2531

Živković M, Ećim-Djurić O, Topisirović G. Numerical simulation of plum drying mathematical model. in Savremena poljoprivredna tehnika. 2011;37(3):235-244.
https://hdl.handle.net/21.15107/rcub_agrospace_2531 .

Živković, Milovan, Ećim-Djurić, Olivera, Topisirović, Goran, "Numerical simulation of plum drying mathematical model" in Savremena poljoprivredna tehnika, 37, no. 3 (2011):235-244,
https://hdl.handle.net/21.15107/rcub_agrospace_2531 .

TY  - CONF
AU  - Turanjanin, V.
AU  - Ećim-Djurić, Olivera
AU  - Vučićević, B.
AU  - Kavgić, M.
AU  - Jovanović, M.
PY  - 2011
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2440
AB  - This paper presents heat consumption optimization and possibility to increase energy efficiency of Belgrade residential buildings. Residential buildings were selected according to the year of construction and type of building (multi apartment buildings and single family houses). Numerical simulation was applied to investigate heat consumption of buildings' zero model which represents buildings' current state. Numerical simulations were performed for typical meteorological year conditions for Belgrade city area. In this calculation, building surroundings, outside heat transfer coefficient (which depends on local weather conditions) and inside heat transfer coefficient (according to the type of walls) were taken in account. The validation of zero model is based on measured and calculated inside air temperature in considered objects. The influence of improved building envelope on heat consumption, compared to building zero model, was investigated by adding insulation and/or by replacement existing windows with those with better thermal characteristics. The energy consumption was numerically simulated over whole heating season. The energy efficiency increase calculations showed possibility for saving heating energy from 10% to 80%. This conclusion was obtained by comparing four different scenarios of improved building envelope with basic zero model for four modeling objects (two multi apartment buildings and two single family houses). Results indicate that focus of energy savings should be on how to decrease energy consumption in households sector. Additionally, solar energy use for two different objects (PV cells were applied for multi apartment building and solar thermal collectors for single family house) was numerically simulated.
PB  - 24th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2011
C3  - Proceedings of the 24th International Conference on Efficiency, Cost, Optimization, Simulation and E
T1  - Numerical simulation of energy consumption optimization in residential buildings in Belgrade
EP  - 3424
SP  - 3415
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_2440
ER  - 

@conference{
author = "Turanjanin, V. and Ećim-Djurić, Olivera and Vučićević, B. and Kavgić, M. and Jovanović, M.",
year = "2011",
abstract = "This paper presents heat consumption optimization and possibility to increase energy efficiency of Belgrade residential buildings. Residential buildings were selected according to the year of construction and type of building (multi apartment buildings and single family houses). Numerical simulation was applied to investigate heat consumption of buildings' zero model which represents buildings' current state. Numerical simulations were performed for typical meteorological year conditions for Belgrade city area. In this calculation, building surroundings, outside heat transfer coefficient (which depends on local weather conditions) and inside heat transfer coefficient (according to the type of walls) were taken in account. The validation of zero model is based on measured and calculated inside air temperature in considered objects. The influence of improved building envelope on heat consumption, compared to building zero model, was investigated by adding insulation and/or by replacement existing windows with those with better thermal characteristics. The energy consumption was numerically simulated over whole heating season. The energy efficiency increase calculations showed possibility for saving heating energy from 10% to 80%. This conclusion was obtained by comparing four different scenarios of improved building envelope with basic zero model for four modeling objects (two multi apartment buildings and two single family houses). Results indicate that focus of energy savings should be on how to decrease energy consumption in households sector. Additionally, solar energy use for two different objects (PV cells were applied for multi apartment building and solar thermal collectors for single family house) was numerically simulated.",
publisher = "24th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2011",
journal = "Proceedings of the 24th International Conference on Efficiency, Cost, Optimization, Simulation and E",
title = "Numerical simulation of energy consumption optimization in residential buildings in Belgrade",
pages = "3424-3415",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_2440"
}

Turanjanin, V., Ećim-Djurić, O., Vučićević, B., Kavgić, M.,& Jovanović, M.. (2011). Numerical simulation of energy consumption optimization in residential buildings in Belgrade. in Proceedings of the 24th International Conference on Efficiency, Cost, Optimization, Simulation and E
24th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2011., 3415-3424.
https://hdl.handle.net/21.15107/rcub_agrospace_2440

Turanjanin V, Ećim-Djurić O, Vučićević B, Kavgić M, Jovanović M. Numerical simulation of energy consumption optimization in residential buildings in Belgrade. in Proceedings of the 24th International Conference on Efficiency, Cost, Optimization, Simulation and E. 2011;:3415-3424.
https://hdl.handle.net/21.15107/rcub_agrospace_2440 .

Turanjanin, V., Ećim-Djurić, Olivera, Vučićević, B., Kavgić, M., Jovanović, M., "Numerical simulation of energy consumption optimization in residential buildings in Belgrade" in Proceedings of the 24th International Conference on Efficiency, Cost, Optimization, Simulation and E (2011):3415-3424,
https://hdl.handle.net/21.15107/rcub_agrospace_2440 .

TY  - JOUR
AU  - Ećim-Djurić, Olivera
AU  - Topisirović, Goran
PY  - 2010
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2328
AB  - Good ventilation system in livestock buildings is necessary for removing excess moisture and heat and for improving building environment in general. Natural ventilation does not require energy consumption and on the other hand, animals would not be affected by electrical power failures. Because natural ventilation depends largely on temperature difference between inside and outside air and wind velocity and direction it is very important in early stages of building design to provide orientation and accurate opening areas. Numerical simulation of natural ventilation and computation of fluid dynamics in livestock buildings can be usefully integrated in whole ventilation system optimization and related energy consumption decrease. Even in mechanical system ventilation, from flow field obtained in numerical simulation it is possible to optimize these systems. CFD analysis is generally restricted to the study of buildings' environment flows and space study, and the designer must supply boundary conditions in the form of external and internal buildings' envelope/wall surface conditions. Finally, the needs for further research and engineering development are outlined.
PB  - Elsevier Science Sa, Lausanne
T2  - Energy and Buildings
T1  - Energy efficiency optimization of combined ventilation systems in livestock buildings
EP  - 1171
IS  - 8
SP  - 1165
VL  - 42
DO  - 10.1016/j.enbuild.2009.10.035
ER  - 

@article{
author = "Ećim-Djurić, Olivera and Topisirović, Goran",
year = "2010",
abstract = "Good ventilation system in livestock buildings is necessary for removing excess moisture and heat and for improving building environment in general. Natural ventilation does not require energy consumption and on the other hand, animals would not be affected by electrical power failures. Because natural ventilation depends largely on temperature difference between inside and outside air and wind velocity and direction it is very important in early stages of building design to provide orientation and accurate opening areas. Numerical simulation of natural ventilation and computation of fluid dynamics in livestock buildings can be usefully integrated in whole ventilation system optimization and related energy consumption decrease. Even in mechanical system ventilation, from flow field obtained in numerical simulation it is possible to optimize these systems. CFD analysis is generally restricted to the study of buildings' environment flows and space study, and the designer must supply boundary conditions in the form of external and internal buildings' envelope/wall surface conditions. Finally, the needs for further research and engineering development are outlined.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Energy and Buildings",
title = "Energy efficiency optimization of combined ventilation systems in livestock buildings",
pages = "1171-1165",
number = "8",
volume = "42",
doi = "10.1016/j.enbuild.2009.10.035"
}

Ećim-Djurić, O.,& Topisirović, G.. (2010). Energy efficiency optimization of combined ventilation systems in livestock buildings. in Energy and Buildings
Elsevier Science Sa, Lausanne., 42(8), 1165-1171.
https://doi.org/10.1016/j.enbuild.2009.10.035

Ećim-Djurić O, Topisirović G. Energy efficiency optimization of combined ventilation systems in livestock buildings. in Energy and Buildings. 2010;42(8):1165-1171.
doi:10.1016/j.enbuild.2009.10.035 .

Ećim-Djurić, Olivera, Topisirović, Goran, "Energy efficiency optimization of combined ventilation systems in livestock buildings" in Energy and Buildings, 42, no. 8 (2010):1165-1171,
https://doi.org/10.1016/j.enbuild.2009.10.035 . .

TY  - JOUR
AU  - Ećim-Djurić, Olivera
AU  - Milanović, Predrag
AU  - Marković, Tijana
PY  - 2009
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1942
AB  - The paper described the process of solving partial differential equations of heat conduction in the walls of the building envelope by numerical discretization in order to determine the precise unsteady temperature fields in the object. Numerical solution of complex equations of heat transfer is aimed at determining the thermal behavior of the object taking into account all the external parameters, stochastic variable in time, affecting the behavior of the object. Numerical simulation of the greenhouse is suitable for relatively simple geometry of the object and a small number of zones (rooms) inside the building. The procedure is explained in this paper is applied to the aid package for easier and faster calculation data.
AB  - U radu je opisan postupak rešavanja parcijalnih diferencijalnih jednačina provođenja toplote u zidovima omotača objekta numeričkom diskretizacijom u cilju preciznog određivanja nestacionarnog temperaturskog polja u objektu. Numeričko rešavanje složenih jednačina prenosa toplote ima za cilj određivanje toplotnog ponašanja objekta uzimajući u obzir sve spoljne parametre, stohastički promenljive u vremenu, koji utiču na ponašanje objekta. Numerička simulacija plastenika pogodna je zbog relativno jednostavne geometrije objekta i manjeg broja zona (prostorija) unutar objekta. Postupak koji je objašnjen u radu primenjen je u pomoć programskog paketa radi lakšeg i bržeg računanja podataka.
PB  - Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd
T2  - Poljoprivredna tehnika
T1  - Numerical simulation of greenhouses heat load
T1  - Numerička simulacija toplotnog opterećenja plastenika
EP  - 132
IS  - 2
SP  - 125
VL  - 34
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_1942
ER  - 

@article{
author = "Ećim-Djurić, Olivera and Milanović, Predrag and Marković, Tijana",
year = "2009",
abstract = "The paper described the process of solving partial differential equations of heat conduction in the walls of the building envelope by numerical discretization in order to determine the precise unsteady temperature fields in the object. Numerical solution of complex equations of heat transfer is aimed at determining the thermal behavior of the object taking into account all the external parameters, stochastic variable in time, affecting the behavior of the object. Numerical simulation of the greenhouse is suitable for relatively simple geometry of the object and a small number of zones (rooms) inside the building. The procedure is explained in this paper is applied to the aid package for easier and faster calculation data., U radu je opisan postupak rešavanja parcijalnih diferencijalnih jednačina provođenja toplote u zidovima omotača objekta numeričkom diskretizacijom u cilju preciznog određivanja nestacionarnog temperaturskog polja u objektu. Numeričko rešavanje složenih jednačina prenosa toplote ima za cilj određivanje toplotnog ponašanja objekta uzimajući u obzir sve spoljne parametre, stohastički promenljive u vremenu, koji utiču na ponašanje objekta. Numerička simulacija plastenika pogodna je zbog relativno jednostavne geometrije objekta i manjeg broja zona (prostorija) unutar objekta. Postupak koji je objašnjen u radu primenjen je u pomoć programskog paketa radi lakšeg i bržeg računanja podataka.",
publisher = "Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd",
journal = "Poljoprivredna tehnika",
title = "Numerical simulation of greenhouses heat load, Numerička simulacija toplotnog opterećenja plastenika",
pages = "132-125",
number = "2",
volume = "34",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_1942"
}

Ećim-Djurić, O., Milanović, P.,& Marković, T.. (2009). Numerical simulation of greenhouses heat load. in Poljoprivredna tehnika
Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd., 34(2), 125-132.
https://hdl.handle.net/21.15107/rcub_agrospace_1942

Ećim-Djurić O, Milanović P, Marković T. Numerical simulation of greenhouses heat load. in Poljoprivredna tehnika. 2009;34(2):125-132.
https://hdl.handle.net/21.15107/rcub_agrospace_1942 .

Ećim-Djurić, Olivera, Milanović, Predrag, Marković, Tijana, "Numerical simulation of greenhouses heat load" in Poljoprivredna tehnika, 34, no. 2 (2009):125-132,
https://hdl.handle.net/21.15107/rcub_agrospace_1942 .

TY  - JOUR
AU  - Todorović, Marija
AU  - Ilinčić, Nataša
AU  - Martinović, Ivana
AU  - Ećim, Olivera
PY  - 2009
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1991
AB  - This paper is addressing the technical advances in building's refurbishment introducing energy efficiency and RES -renewable energy sources. It has been shown hot BPS - Building Performance Simulation can be practically implemented in sustainable buildings design and redesign. The study of New Belgrade buildings block refurbishment by the optimization of building envelope/structure energy efficiency, and PV panels integration in building facade is also presented. Besides, the activities and whole structure of the project proposal for the 'Cost Effective Solar Integrated Refurbishment of whole Residential Buildings in New Belgrade' is presented, including preliminary study results justifying the significance of the proposed project for rational city energy system planning (particularly its district heating/cooling). It could assist in the future city-wide sustainable energy management. Twofold needs of facade/envelope's improvement - thermal and its moisture removal by well ventilated air layer offer solar integrated refurbishment. Concerning the construction works and existing building structure statics, low weight PV cells and PV system's simplicity would make the most appropriate of the solar technologies candidate to be integrated in renewed facade.
AB  - predmet rada su tehnologije energetske rekonstrukcije zgrada u cilju povećanja njihove energetske efikasnosti i uvođenja korišćenja obnovljivih izvora energije (OIE). Pokazano je kako se simulacije termičkog ponašanja zgrada (STPZ) mogu praktično primenuti pri projektovanju održivih novih zgrada ili rekonstrukcije postojećih. Prikazane su mogućnosti unapređenja energetske efikasnosti stambenih blokova Novog Beograda energetskom optimizacijom omotača i strukture zgrada uz integraciju FN panela. Date su i aktivnosti i predlog cele strukture predloga projekta 'Ekonomično energetsko-arhitektonske rekonstrukcije stambenih blokova Novog Beograda' uključujući i rezultate preliminarnih analiza koji potvrđuju značaj sadržaja projekta koji se predlaže. Za energetike gradova (posebno sisteme daljinskog grejanja/hlađenja) projekat bi mogao da bude osnova razvoja održive komunalne energetike. Dvojna potreba poboljšanja termičkih osobina omotača i odstranjivanje vlage dobro ventiliranim slojem vazduha, pruža mogućnost jednovremenog povećanja energetske efikasnosti i integracije aktivnog korišćenja sunčeve energije, imajući u vidu konstrukcione radove i statiku strukture zgrade. Jaki FN paneli i FN sistem bi mogli biti najprikladnija tehnologija korišćenja sunčeve energije za integraciju sa obnovljenom fasadom.
PB  - Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS), Beograd
T2  - Klimatizacija, grejanje, hlađenje
T1  - RES integrated refurbishment of existing residential buildings to approach sustainable municipal energy system
T1  - Unapređenje energetske efikasnosti i integracija korišćenja OIE u postojećim stambenim objektima - put ka održivom sistemu komunalne energetike
EP  - 48
IS  - 3
SP  - 41
VL  - 38
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_1991
ER  - 

@article{
author = "Todorović, Marija and Ilinčić, Nataša and Martinović, Ivana and Ećim, Olivera",
year = "2009",
abstract = "This paper is addressing the technical advances in building's refurbishment introducing energy efficiency and RES -renewable energy sources. It has been shown hot BPS - Building Performance Simulation can be practically implemented in sustainable buildings design and redesign. The study of New Belgrade buildings block refurbishment by the optimization of building envelope/structure energy efficiency, and PV panels integration in building facade is also presented. Besides, the activities and whole structure of the project proposal for the 'Cost Effective Solar Integrated Refurbishment of whole Residential Buildings in New Belgrade' is presented, including preliminary study results justifying the significance of the proposed project for rational city energy system planning (particularly its district heating/cooling). It could assist in the future city-wide sustainable energy management. Twofold needs of facade/envelope's improvement - thermal and its moisture removal by well ventilated air layer offer solar integrated refurbishment. Concerning the construction works and existing building structure statics, low weight PV cells and PV system's simplicity would make the most appropriate of the solar technologies candidate to be integrated in renewed facade., predmet rada su tehnologije energetske rekonstrukcije zgrada u cilju povećanja njihove energetske efikasnosti i uvođenja korišćenja obnovljivih izvora energije (OIE). Pokazano je kako se simulacije termičkog ponašanja zgrada (STPZ) mogu praktično primenuti pri projektovanju održivih novih zgrada ili rekonstrukcije postojećih. Prikazane su mogućnosti unapređenja energetske efikasnosti stambenih blokova Novog Beograda energetskom optimizacijom omotača i strukture zgrada uz integraciju FN panela. Date su i aktivnosti i predlog cele strukture predloga projekta 'Ekonomično energetsko-arhitektonske rekonstrukcije stambenih blokova Novog Beograda' uključujući i rezultate preliminarnih analiza koji potvrđuju značaj sadržaja projekta koji se predlaže. Za energetike gradova (posebno sisteme daljinskog grejanja/hlađenja) projekat bi mogao da bude osnova razvoja održive komunalne energetike. Dvojna potreba poboljšanja termičkih osobina omotača i odstranjivanje vlage dobro ventiliranim slojem vazduha, pruža mogućnost jednovremenog povećanja energetske efikasnosti i integracije aktivnog korišćenja sunčeve energije, imajući u vidu konstrukcione radove i statiku strukture zgrade. Jaki FN paneli i FN sistem bi mogli biti najprikladnija tehnologija korišćenja sunčeve energije za integraciju sa obnovljenom fasadom.",
publisher = "Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS), Beograd",
journal = "Klimatizacija, grejanje, hlađenje",
title = "RES integrated refurbishment of existing residential buildings to approach sustainable municipal energy system, Unapređenje energetske efikasnosti i integracija korišćenja OIE u postojećim stambenim objektima - put ka održivom sistemu komunalne energetike",
pages = "48-41",
number = "3",
volume = "38",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_1991"
}

Todorović, M., Ilinčić, N., Martinović, I.,& Ećim, O.. (2009). RES integrated refurbishment of existing residential buildings to approach sustainable municipal energy system. in Klimatizacija, grejanje, hlađenje
Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS), Beograd., 38(3), 41-48.
https://hdl.handle.net/21.15107/rcub_agrospace_1991

Todorović M, Ilinčić N, Martinović I, Ećim O. RES integrated refurbishment of existing residential buildings to approach sustainable municipal energy system. in Klimatizacija, grejanje, hlađenje. 2009;38(3):41-48.
https://hdl.handle.net/21.15107/rcub_agrospace_1991 .

Todorović, Marija, Ilinčić, Nataša, Martinović, Ivana, Ećim, Olivera, "RES integrated refurbishment of existing residential buildings to approach sustainable municipal energy system" in Klimatizacija, grejanje, hlađenje, 38, no. 3 (2009):41-48,
https://hdl.handle.net/21.15107/rcub_agrospace_1991 .

TY  - JOUR
AU  - Ećim-Djurić, Olivera
AU  - Tomić, Vojislav
AU  - Milanović, Predrag
PY  - 2008
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1742
AB  - Setting-up the right greenhouse environment is subject to complex requirements. Present conditions real time parameters are analyzed from the viewpoint of greenhouse heating and ventilation system demands in winter period. Insufficient amount of heat energy gained from geothermal source during the low outside air temperatures period and unused geothermal heat energy in periods when heating system is not required are discussed. Complex environmental parameters modeling necessary for greenhouse heating and ventilation yearly energy requirements is provided. Numerical simulations are performed to provide energy efficiency improving, effective geothermal source use, defining heat storage system and conceptual technical design. Finally, needs for further research and engineering development are outlined.
AB  - Određivanje unutrašnjih parametara u plastenicima i staklenicima zahteva kompleksno razmatranje u cilju određivanja optimalnih sistema grejanja prostor au zimskom periodu i ventilacije u letnjem periodu. U cilju povećanja energetske efikasnosti objekta razmatrano je grejanje objekta energijom geotermalnog izvora, kao i modeliranje potrošnje geotermalne vode u uslovima nedovoljne količine pri izuzetno niskom temperaturama spoljašnjeg vazduha. Numeričke simulacije toplotnog opterećenja plastenika sprovedene su u cilju povećanja efektivne upotrebe izvora geotermalne energije i konceptualnih tehničkih rešenja. U radu je definisano termičko ponašanje objekta. Konačno, potreba za daljim istraživanjem i inženjerskim razvojem je naglašena.
PB  - Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd
T2  - Poljoprivredna tehnika
T1  - Optimisation of energy efficiency geothermal energy system for greenhouse heating
T1  - Energetska optimizacija sistema za korišćenje geotermalne energije za grejanje plastenika
EP  - 55
IS  - 3
SP  - 49
VL  - 33
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_1742
ER  - 

@article{
author = "Ećim-Djurić, Olivera and Tomić, Vojislav and Milanović, Predrag",
year = "2008",
abstract = "Setting-up the right greenhouse environment is subject to complex requirements. Present conditions real time parameters are analyzed from the viewpoint of greenhouse heating and ventilation system demands in winter period. Insufficient amount of heat energy gained from geothermal source during the low outside air temperatures period and unused geothermal heat energy in periods when heating system is not required are discussed. Complex environmental parameters modeling necessary for greenhouse heating and ventilation yearly energy requirements is provided. Numerical simulations are performed to provide energy efficiency improving, effective geothermal source use, defining heat storage system and conceptual technical design. Finally, needs for further research and engineering development are outlined., Određivanje unutrašnjih parametara u plastenicima i staklenicima zahteva kompleksno razmatranje u cilju određivanja optimalnih sistema grejanja prostor au zimskom periodu i ventilacije u letnjem periodu. U cilju povećanja energetske efikasnosti objekta razmatrano je grejanje objekta energijom geotermalnog izvora, kao i modeliranje potrošnje geotermalne vode u uslovima nedovoljne količine pri izuzetno niskom temperaturama spoljašnjeg vazduha. Numeričke simulacije toplotnog opterećenja plastenika sprovedene su u cilju povećanja efektivne upotrebe izvora geotermalne energije i konceptualnih tehničkih rešenja. U radu je definisano termičko ponašanje objekta. Konačno, potreba za daljim istraživanjem i inženjerskim razvojem je naglašena.",
publisher = "Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd",
journal = "Poljoprivredna tehnika",
title = "Optimisation of energy efficiency geothermal energy system for greenhouse heating, Energetska optimizacija sistema za korišćenje geotermalne energije za grejanje plastenika",
pages = "55-49",
number = "3",
volume = "33",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_1742"
}

Ećim-Djurić, O., Tomić, V.,& Milanović, P.. (2008). Optimisation of energy efficiency geothermal energy system for greenhouse heating. in Poljoprivredna tehnika
Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd., 33(3), 49-55.
https://hdl.handle.net/21.15107/rcub_agrospace_1742

Ećim-Djurić O, Tomić V, Milanović P. Optimisation of energy efficiency geothermal energy system for greenhouse heating. in Poljoprivredna tehnika. 2008;33(3):49-55.
https://hdl.handle.net/21.15107/rcub_agrospace_1742 .

Ećim-Djurić, Olivera, Tomić, Vojislav, Milanović, Predrag, "Optimisation of energy efficiency geothermal energy system for greenhouse heating" in Poljoprivredna tehnika, 33, no. 3 (2008):49-55,
https://hdl.handle.net/21.15107/rcub_agrospace_1742 .

TY  - JOUR
AU  - Topisirović, Goran
AU  - Ećim-Djurić, Olivera
PY  - 2008
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1741
AB  - This paper deals with three dimensional flow fields of livestock buildings prediction by numerical simulations and computational fluid dynamics - CFD. Flow field investigation is based on analysis of all relevant parameters that influences on temperature and flow field inside and outside of object, taking in account local meteorological conditions and terrain configuration. Based on results it is possible to design improved models in early stages of architectural design or later, and improvement of object energy efficiency.
AB  - U radu je dat metod predviđanja trodimenzionalnog strujnog polja u stočarskim objektima primenom numeričkih simulacija i kompjuterske dinamike fluida - CFD. Ispitivanje strujnog polja sprovodi se na osnovu analize svih relevantnih faktora koji utiču na strujnu sliku unutar i oko objekta uzimajući u obzir lokalne meteorološke podatke, merodavne prepreke strujanju iz pojedinih pravaca. Na osnovu dobijene strujne slike, moguće je definisanje unapređenih modela objekta u cilju unapređenja energetske efikasnosti objekta ili arhitektonskog korigovanja objekta u ranim fazama projektovanja.
PB  - Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd
T2  - Poljoprivredna tehnika
T1  - Numerical prediction of natural ventilation flow field in livestock buildings
T1  - Numeričko predviđanje strujnog polja pri prirodnoj ventilaciji stočarskih objekata
EP  - 47
IS  - 3
SP  - 41
VL  - 33
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_1741
ER  - 

@article{
author = "Topisirović, Goran and Ećim-Djurić, Olivera",
year = "2008",
abstract = "This paper deals with three dimensional flow fields of livestock buildings prediction by numerical simulations and computational fluid dynamics - CFD. Flow field investigation is based on analysis of all relevant parameters that influences on temperature and flow field inside and outside of object, taking in account local meteorological conditions and terrain configuration. Based on results it is possible to design improved models in early stages of architectural design or later, and improvement of object energy efficiency., U radu je dat metod predviđanja trodimenzionalnog strujnog polja u stočarskim objektima primenom numeričkih simulacija i kompjuterske dinamike fluida - CFD. Ispitivanje strujnog polja sprovodi se na osnovu analize svih relevantnih faktora koji utiču na strujnu sliku unutar i oko objekta uzimajući u obzir lokalne meteorološke podatke, merodavne prepreke strujanju iz pojedinih pravaca. Na osnovu dobijene strujne slike, moguće je definisanje unapređenih modela objekta u cilju unapređenja energetske efikasnosti objekta ili arhitektonskog korigovanja objekta u ranim fazama projektovanja.",
publisher = "Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd",
journal = "Poljoprivredna tehnika",
title = "Numerical prediction of natural ventilation flow field in livestock buildings, Numeričko predviđanje strujnog polja pri prirodnoj ventilaciji stočarskih objekata",
pages = "47-41",
number = "3",
volume = "33",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_1741"
}

Topisirović, G.,& Ećim-Djurić, O.. (2008). Numerical prediction of natural ventilation flow field in livestock buildings. in Poljoprivredna tehnika
Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd., 33(3), 41-47.
https://hdl.handle.net/21.15107/rcub_agrospace_1741

Topisirović G, Ećim-Djurić O. Numerical prediction of natural ventilation flow field in livestock buildings. in Poljoprivredna tehnika. 2008;33(3):41-47.
https://hdl.handle.net/21.15107/rcub_agrospace_1741 .

Topisirović, Goran, Ećim-Djurić, Olivera, "Numerical prediction of natural ventilation flow field in livestock buildings" in Poljoprivredna tehnika, 33, no. 3 (2008):41-47,
https://hdl.handle.net/21.15107/rcub_agrospace_1741 .

TY  - JOUR
AU  - Todorović, M.
AU  - Vasiljević, Zorica
AU  - Ećim, Olivera
AU  - Dimitrijević, B.
AU  - Zlatanović, Ivan
PY  - 2007
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1501
AB  - In this paper are presented the results of optimization of thermal and photovoltaic system of solar energy utilization aimed to reduce CO2 emission by energy efficient and cost-effective replacing fossil fuel and electricity with solar energy for heating of water for different purposes (for pools sanitary water, washing) in the Special hospital of the Spa Rusanda -Melenci. Crucial for success of the study is understanding and prediction of solar water heating systems dynamic behaviour and synergetic relations between energy efficiency, solar radiation intensity stochastic changes, and sanitary water consumption dynamics. Prediction and analysis of relevant subsystems dynamics was basis for the optimisation of the TES - Thermal Energy Storage role within the system energy efficiency optimisation. In addition, the possible integration of the waste water heat utilization using heat-pump energy recovery system and reheating using heat pump powered by the solar PV electricity are analyzed. Although, the solar water heating has much higher efficiency (thermal - 4 to 5 times higher than PV) the evaluation of given new technical solution confirmed its high energy efficiency and cost effectiveness. Necessary alternative energy, during the periods when there is not enough solar radiation, can be efficiently provided concerning the possibility to cover nearly 80-90% of water heating needs, if water waste heat and TES are used as a heat pump source.
AB  - U radu su izloženi rezultati studije i idejnog projekta urađenog u okviru Programa obnovljivih izvora energije srpske Agencije za energetsku efikasnost - SEEA. Data su tehnička rešenja i optimizacija sistema toplotnog i fotonaponskog korišćenja energije sunčevog zračenja za grejanje vode za različite namene (bazene, sanitarnu vodu, pranje veša i kuhinja) u Specijalnoj bolnici Rusanda - Melenci, u cilju smanjenja emisije ugljen-dioksida. Pokazano je da se zamena fosilnih goriva i električne energije može uspešno ostvariti putem energetski efikasnog i ekonomičnog korišćenja sunčeve energije. Od posebne važnosti za postizanje željenog cilja je razumevanje i predviđanje dinamičkog ponašanja sistema za grejanje vode sunčevom energijom i sinergetskih veza energetske efikasnosti, dinamike promena intenziteta sunčevog zračenja i dinamike potrošnje tople vode. Analizirana je moguća integracija primene toplote otpadne vode primenom toplotne pumpe i sistema povraćaja toplote i daljeg dogrevanja toplotnom pumpom napajanom električnom energijom proizvedenom fotonaponskim sistemom. Iako sistem za grejanje vode sunčevom energijom ima veću efikasnost (toplotno pretvaranje je 4 do 5 puta veće od fotonaponskog), utvrđeno je da se primenom novog tehničkog rešenja (sprega povraćaja toplote, toplotne pumpe i fotonaponskog sistema) može postići efektivnost i ekonomičnost sistema primene fotonaponskog pretvaranja potpuno uporedivog reda veličine sa toplotnim pretvaranjem sunčeve energije.
PB  - Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS), Beograd
T2  - Klimatizacija, grejanje, hlađenje
T1  - Energetic and economical optimization of thermal and photovoltaic system of solar energy utilization in special hospital of the Rusanda spa
T1  - Energetska i ekonomska optimizacija sistema toplotnog i fotonaponskog korišćenja sunčeve energije u specijalnoj bolnici u Banji Rusandi
EP  - 52
IS  - 3
SP  - 43
VL  - 36
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_1501
ER  - 

@article{
author = "Todorović, M. and Vasiljević, Zorica and Ećim, Olivera and Dimitrijević, B. and Zlatanović, Ivan",
year = "2007",
abstract = "In this paper are presented the results of optimization of thermal and photovoltaic system of solar energy utilization aimed to reduce CO2 emission by energy efficient and cost-effective replacing fossil fuel and electricity with solar energy for heating of water for different purposes (for pools sanitary water, washing) in the Special hospital of the Spa Rusanda -Melenci. Crucial for success of the study is understanding and prediction of solar water heating systems dynamic behaviour and synergetic relations between energy efficiency, solar radiation intensity stochastic changes, and sanitary water consumption dynamics. Prediction and analysis of relevant subsystems dynamics was basis for the optimisation of the TES - Thermal Energy Storage role within the system energy efficiency optimisation. In addition, the possible integration of the waste water heat utilization using heat-pump energy recovery system and reheating using heat pump powered by the solar PV electricity are analyzed. Although, the solar water heating has much higher efficiency (thermal - 4 to 5 times higher than PV) the evaluation of given new technical solution confirmed its high energy efficiency and cost effectiveness. Necessary alternative energy, during the periods when there is not enough solar radiation, can be efficiently provided concerning the possibility to cover nearly 80-90% of water heating needs, if water waste heat and TES are used as a heat pump source., U radu su izloženi rezultati studije i idejnog projekta urađenog u okviru Programa obnovljivih izvora energije srpske Agencije za energetsku efikasnost - SEEA. Data su tehnička rešenja i optimizacija sistema toplotnog i fotonaponskog korišćenja energije sunčevog zračenja za grejanje vode za različite namene (bazene, sanitarnu vodu, pranje veša i kuhinja) u Specijalnoj bolnici Rusanda - Melenci, u cilju smanjenja emisije ugljen-dioksida. Pokazano je da se zamena fosilnih goriva i električne energije može uspešno ostvariti putem energetski efikasnog i ekonomičnog korišćenja sunčeve energije. Od posebne važnosti za postizanje željenog cilja je razumevanje i predviđanje dinamičkog ponašanja sistema za grejanje vode sunčevom energijom i sinergetskih veza energetske efikasnosti, dinamike promena intenziteta sunčevog zračenja i dinamike potrošnje tople vode. Analizirana je moguća integracija primene toplote otpadne vode primenom toplotne pumpe i sistema povraćaja toplote i daljeg dogrevanja toplotnom pumpom napajanom električnom energijom proizvedenom fotonaponskim sistemom. Iako sistem za grejanje vode sunčevom energijom ima veću efikasnost (toplotno pretvaranje je 4 do 5 puta veće od fotonaponskog), utvrđeno je da se primenom novog tehničkog rešenja (sprega povraćaja toplote, toplotne pumpe i fotonaponskog sistema) može postići efektivnost i ekonomičnost sistema primene fotonaponskog pretvaranja potpuno uporedivog reda veličine sa toplotnim pretvaranjem sunčeve energije.",
publisher = "Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS), Beograd",
journal = "Klimatizacija, grejanje, hlađenje",
title = "Energetic and economical optimization of thermal and photovoltaic system of solar energy utilization in special hospital of the Rusanda spa, Energetska i ekonomska optimizacija sistema toplotnog i fotonaponskog korišćenja sunčeve energije u specijalnoj bolnici u Banji Rusandi",
pages = "52-43",
number = "3",
volume = "36",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_1501"
}

Todorović, M., Vasiljević, Z., Ećim, O., Dimitrijević, B.,& Zlatanović, I.. (2007). Energetic and economical optimization of thermal and photovoltaic system of solar energy utilization in special hospital of the Rusanda spa. in Klimatizacija, grejanje, hlađenje
Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS), Beograd., 36(3), 43-52.
https://hdl.handle.net/21.15107/rcub_agrospace_1501

Todorović M, Vasiljević Z, Ećim O, Dimitrijević B, Zlatanović I. Energetic and economical optimization of thermal and photovoltaic system of solar energy utilization in special hospital of the Rusanda spa. in Klimatizacija, grejanje, hlađenje. 2007;36(3):43-52.
https://hdl.handle.net/21.15107/rcub_agrospace_1501 .

Todorović, M., Vasiljević, Zorica, Ećim, Olivera, Dimitrijević, B., Zlatanović, Ivan, "Energetic and economical optimization of thermal and photovoltaic system of solar energy utilization in special hospital of the Rusanda spa" in Klimatizacija, grejanje, hlađenje, 36, no. 3 (2007):43-52,
https://hdl.handle.net/21.15107/rcub_agrospace_1501 .

TY  - JOUR
AU  - Todorović, Marija
AU  - Ećim, Olivera
AU  - Zlatanović, Ivan
PY  - 2005
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/898
AB  - CHP - Combined Heat and Power, Cogeneration or Trigeneration (when cooling is needed in addition to heating) of heat and power systems normally make effective use of both electric power and heat energy from a generator, by a method that obtains two available forms of energy from a single fuel source. Consequently, in addition to being a promising counter measure to environmental problems by virtue of its available use of energy, CHP is also effective in dealing with the problem of peak power loads as it can be used as a distributed source of electric power. In this paper, the key issue in the CHP Micro turbine system design and control optimization has been analyzed and investigated. It is the issue of the determination of the dynamics of system and the machine’s loads and capacity, having the excellent economic and environmental characteristics on the electric power and the heat demand. In general, the ratio of electric power demand to heat demand in general buildings varies daily over the course of the year. Demand Loads and System Performance Dynamics predicted through numerical Simulations and related Algorithm are sound basis for designing and operation of the intelligent EMS - Energy Management System. EMS intelligence reliability is crucial to achieve the expected optimal control performance and related benefits.
AB  - KPTS - Kombinovanom proizvodnjom toplote i snage - kogeneracijom ili trigeneracijom (kada je potrebno i hlađenje pored grejanja) se efektivno koristi električna i toplotna energija generatora proizvedena iz određenog energetskog izvora. Tako, uz prednost doprinosa povećanju energetske efikasnosti korišćenja primarne energije izvora i time smanjenja ekoloških problema, KPTS je jednovremeno efektivno sredstvo za smanjenje vršnih opterećenja kada se koristi kao distribuirani system proizvodnje električne energije. U radu se analizira i dinamičkim simulacijama ispituje ključni faktor optimalnog projektovanja i kontrole KPTS, a to je određivanje dinamike potrebe električne i toplotne snage potrošača, odnosno potrošnje. Generalno odnos potreba električne i potreba toplotne snage (za hlađenje se koristi takođe toplota absorbcionim sistemom) je tokom godine promenljiv. Opterećenje sa strane potrošnje i dinamika osobina sistema određeni putem numeričkih simulacija i odgovarajućeg algoritma su dobra osnova za projektovanje i funkcionisanje inteligentnog EMS - sistema za upravljanje energijom. Pouzdanost inteligencije EMS-a je ključna da se dostignu očekivane prednosti optimalne kontrole.
PB  - Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd
T2  - Poljoprivredna tehnika
T1  - Approaching optimization of the control algorithm of RES based cogeneration system
T1  - Prilaz optimizaciji algoritma upravljanja sistemom kogeneracije na osnovi OIE
EP  - 95
IS  - 4
SP  - 87
VL  - 30
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_898
ER  - 

@article{
author = "Todorović, Marija and Ećim, Olivera and Zlatanović, Ivan",
year = "2005",
abstract = "CHP - Combined Heat and Power, Cogeneration or Trigeneration (when cooling is needed in addition to heating) of heat and power systems normally make effective use of both electric power and heat energy from a generator, by a method that obtains two available forms of energy from a single fuel source. Consequently, in addition to being a promising counter measure to environmental problems by virtue of its available use of energy, CHP is also effective in dealing with the problem of peak power loads as it can be used as a distributed source of electric power. In this paper, the key issue in the CHP Micro turbine system design and control optimization has been analyzed and investigated. It is the issue of the determination of the dynamics of system and the machine’s loads and capacity, having the excellent economic and environmental characteristics on the electric power and the heat demand. In general, the ratio of electric power demand to heat demand in general buildings varies daily over the course of the year. Demand Loads and System Performance Dynamics predicted through numerical Simulations and related Algorithm are sound basis for designing and operation of the intelligent EMS - Energy Management System. EMS intelligence reliability is crucial to achieve the expected optimal control performance and related benefits., KPTS - Kombinovanom proizvodnjom toplote i snage - kogeneracijom ili trigeneracijom (kada je potrebno i hlađenje pored grejanja) se efektivno koristi električna i toplotna energija generatora proizvedena iz određenog energetskog izvora. Tako, uz prednost doprinosa povećanju energetske efikasnosti korišćenja primarne energije izvora i time smanjenja ekoloških problema, KPTS je jednovremeno efektivno sredstvo za smanjenje vršnih opterećenja kada se koristi kao distribuirani system proizvodnje električne energije. U radu se analizira i dinamičkim simulacijama ispituje ključni faktor optimalnog projektovanja i kontrole KPTS, a to je određivanje dinamike potrebe električne i toplotne snage potrošača, odnosno potrošnje. Generalno odnos potreba električne i potreba toplotne snage (za hlađenje se koristi takođe toplota absorbcionim sistemom) je tokom godine promenljiv. Opterećenje sa strane potrošnje i dinamika osobina sistema određeni putem numeričkih simulacija i odgovarajućeg algoritma su dobra osnova za projektovanje i funkcionisanje inteligentnog EMS - sistema za upravljanje energijom. Pouzdanost inteligencije EMS-a je ključna da se dostignu očekivane prednosti optimalne kontrole.",
publisher = "Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd",
journal = "Poljoprivredna tehnika",
title = "Approaching optimization of the control algorithm of RES based cogeneration system, Prilaz optimizaciji algoritma upravljanja sistemom kogeneracije na osnovi OIE",
pages = "95-87",
number = "4",
volume = "30",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_898"
}

Todorović, M., Ećim, O.,& Zlatanović, I.. (2005). Approaching optimization of the control algorithm of RES based cogeneration system. in Poljoprivredna tehnika
Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd., 30(4), 87-95.
https://hdl.handle.net/21.15107/rcub_agrospace_898

Todorović M, Ećim O, Zlatanović I. Approaching optimization of the control algorithm of RES based cogeneration system. in Poljoprivredna tehnika. 2005;30(4):87-95.
https://hdl.handle.net/21.15107/rcub_agrospace_898 .

Todorović, Marija, Ećim, Olivera, Zlatanović, Ivan, "Approaching optimization of the control algorithm of RES based cogeneration system" in Poljoprivredna tehnika, 30, no. 4 (2005):87-95,
https://hdl.handle.net/21.15107/rcub_agrospace_898 .

TY  - JOUR
AU  - Ećim, Olivera
AU  - Stamenov, Vasil
AU  - Todorović, Marija
AU  - Topisirović, Goran
PY  - 2005
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/889
AB  - Numerical simulations and computational fluid dynamics can be usefully integrated with architectural modeling, providing designers with a powerful single CFD based architectural modeling and design framework. This framework can be interfaced with the building thermal performance modeling integrating further fully thermal and flow domains within the architectural modeling. CFD analysis is generally restricted to the building’s environment flows or indoor single rooms and spaces flows study, and the designer must supply boundary conditions in the form of external and internal building’s envelope/wall surface conditions. In the case of natural and mixed ventilation, this presents a fundamental problem as the outdoor and indoor boundary conditions are dynamic, inter-related and interactive via building’s architecture and in addition are dependent on external weather conditions and indoor environment control/related heat gains. Therefore, in this study both sides’ boundary conditions are dynamically described, and integrated CFD, BPS and architectural modeling, as a unique framework - new design method, are developed, leading to natural and mixed ventilation energy efficiency optimization. In addition to the presented method, paper gives results of its implementation in designing the building complex in Belgrade. Finally, needs for further research and engineering development are outlined.
AB  - U radu je dat metod optimizacije prirodne ventilacije u cilju smanjenja potrošnje energije i povećanja energetske efikasnosti, odnosno poboljšanja uslova ugodnosti u objektu. Metod optimizacije uključuje ispitivanje trodimenzionog strujnog i temperaturnog polja numeričkim simulacijama. Ispitivanja simulacijama se sprovode za definisan referentni model okolnih objekata u širem kompleksu posmatranog objekta obuhvatajući sve merodavne prepreke strujanju iz pojedinih pravaca ruže vetrova, i definisan referentni model samog objekta. Na osnovu ovako dobijene strujne slike i definisane prepreke vazdušnoj struji za različite orijentacije pravca vetra, se potom definišu unapređeni modeli i korigovani ulazni podaci za preciznije određivanje i složenije strujne slike oko i unutar objekta.
PB  - Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd
T2  - Poljoprivredna tehnika
T1  - Natural ventilation optimization of livestock buildings by numerical simulations
T1  - Optimizacija prirodne ventilacije poljoprivrednih objekata numeričkim simulacijama
EP  - 48
IS  - 3
SP  - 41
VL  - 30
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_889
ER  - 

@article{
author = "Ećim, Olivera and Stamenov, Vasil and Todorović, Marija and Topisirović, Goran",
year = "2005",
abstract = "Numerical simulations and computational fluid dynamics can be usefully integrated with architectural modeling, providing designers with a powerful single CFD based architectural modeling and design framework. This framework can be interfaced with the building thermal performance modeling integrating further fully thermal and flow domains within the architectural modeling. CFD analysis is generally restricted to the building’s environment flows or indoor single rooms and spaces flows study, and the designer must supply boundary conditions in the form of external and internal building’s envelope/wall surface conditions. In the case of natural and mixed ventilation, this presents a fundamental problem as the outdoor and indoor boundary conditions are dynamic, inter-related and interactive via building’s architecture and in addition are dependent on external weather conditions and indoor environment control/related heat gains. Therefore, in this study both sides’ boundary conditions are dynamically described, and integrated CFD, BPS and architectural modeling, as a unique framework - new design method, are developed, leading to natural and mixed ventilation energy efficiency optimization. In addition to the presented method, paper gives results of its implementation in designing the building complex in Belgrade. Finally, needs for further research and engineering development are outlined., U radu je dat metod optimizacije prirodne ventilacije u cilju smanjenja potrošnje energije i povećanja energetske efikasnosti, odnosno poboljšanja uslova ugodnosti u objektu. Metod optimizacije uključuje ispitivanje trodimenzionog strujnog i temperaturnog polja numeričkim simulacijama. Ispitivanja simulacijama se sprovode za definisan referentni model okolnih objekata u širem kompleksu posmatranog objekta obuhvatajući sve merodavne prepreke strujanju iz pojedinih pravaca ruže vetrova, i definisan referentni model samog objekta. Na osnovu ovako dobijene strujne slike i definisane prepreke vazdušnoj struji za različite orijentacije pravca vetra, se potom definišu unapređeni modeli i korigovani ulazni podaci za preciznije određivanje i složenije strujne slike oko i unutar objekta.",
publisher = "Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd",
journal = "Poljoprivredna tehnika",
title = "Natural ventilation optimization of livestock buildings by numerical simulations, Optimizacija prirodne ventilacije poljoprivrednih objekata numeričkim simulacijama",
pages = "48-41",
number = "3",
volume = "30",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_889"
}

Ećim, O., Stamenov, V., Todorović, M.,& Topisirović, G.. (2005). Natural ventilation optimization of livestock buildings by numerical simulations. in Poljoprivredna tehnika
Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd., 30(3), 41-48.
https://hdl.handle.net/21.15107/rcub_agrospace_889

Ećim O, Stamenov V, Todorović M, Topisirović G. Natural ventilation optimization of livestock buildings by numerical simulations. in Poljoprivredna tehnika. 2005;30(3):41-48.
https://hdl.handle.net/21.15107/rcub_agrospace_889 .

Ećim, Olivera, Stamenov, Vasil, Todorović, Marija, Topisirović, Goran, "Natural ventilation optimization of livestock buildings by numerical simulations" in Poljoprivredna tehnika, 30, no. 3 (2005):41-48,
https://hdl.handle.net/21.15107/rcub_agrospace_889 .

TY  - JOUR
AU  - Kosi, Franc F.
AU  - Dimitrijević, Aleksandra
AU  - Ećim, Olivera
PY  - 2004
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/721
AB  - In the paper have been analyzed characteristics of the displacement ventilation with air conditioning systems in industrial plants. Basic principles, thermal and flow design parameters and recommended values of relevant system performances also have been given. For an industrial plant producing cream cheese in which displacement ventilation are applied, some data relating refrigeration load, mass flows of fresh air and air system characteristics are given.
AB  - U radu je analizirane karakteristike potisne ventilacije u industrijskim sistemima klimatizacije. Dati su osnovni principi i strujno-termičke karakteristike sistema i preporučene vrednosti relevantnih parametara. Za sistem klimatizacije industrijskog postrojenja za proizvodnju topljenjih sireva gde je primenjen sistem potisne ventilacije, dati su podaci o toku rashladnog opterećenja i protocima svežeg vazduha i date osnovne karakteristike vazdušnog dela sistema.
PB  - Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd
T2  - Poljoprivredna tehnika
T1  - Displacement ventilation in food industry air conditioning systems
T1  - Potisna ventilacija u sistemima klimatizacije u prehrambenoj industriji
EP  - 56
IS  - 1
SP  - 49
VL  - 28
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_721
ER  - 

@article{
author = "Kosi, Franc F. and Dimitrijević, Aleksandra and Ećim, Olivera",
year = "2004",
abstract = "In the paper have been analyzed characteristics of the displacement ventilation with air conditioning systems in industrial plants. Basic principles, thermal and flow design parameters and recommended values of relevant system performances also have been given. For an industrial plant producing cream cheese in which displacement ventilation are applied, some data relating refrigeration load, mass flows of fresh air and air system characteristics are given., U radu je analizirane karakteristike potisne ventilacije u industrijskim sistemima klimatizacije. Dati su osnovni principi i strujno-termičke karakteristike sistema i preporučene vrednosti relevantnih parametara. Za sistem klimatizacije industrijskog postrojenja za proizvodnju topljenjih sireva gde je primenjen sistem potisne ventilacije, dati su podaci o toku rashladnog opterećenja i protocima svežeg vazduha i date osnovne karakteristike vazdušnog dela sistema.",
publisher = "Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd",
journal = "Poljoprivredna tehnika",
title = "Displacement ventilation in food industry air conditioning systems, Potisna ventilacija u sistemima klimatizacije u prehrambenoj industriji",
pages = "56-49",
number = "1",
volume = "28",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_721"
}

Kosi, F. F., Dimitrijević, A.,& Ećim, O.. (2004). Displacement ventilation in food industry air conditioning systems. in Poljoprivredna tehnika
Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd., 28(1), 49-56.
https://hdl.handle.net/21.15107/rcub_agrospace_721

Kosi FF, Dimitrijević A, Ećim O. Displacement ventilation in food industry air conditioning systems. in Poljoprivredna tehnika. 2004;28(1):49-56.
https://hdl.handle.net/21.15107/rcub_agrospace_721 .

Kosi, Franc F., Dimitrijević, Aleksandra, Ećim, Olivera, "Displacement ventilation in food industry air conditioning systems" in Poljoprivredna tehnika, 28, no. 1 (2004):49-56,
https://hdl.handle.net/21.15107/rcub_agrospace_721 .

TY  - JOUR
AU  - Ećim, Olivera
AU  - Todorović, Marija S.
PY  - 2002
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/482
AB  - The investigation results of the heat transfer coefficients dependence on Nu and Ra numbers and natural convection onset in air layer within two plastic foils have been presented in this paper. The dependence has been investigated for different values of foil temperature differences, thickness of air layer and the angle of inclination of the two-layer foil cover towards the horizontal plane.
AB  - U radu su izloženi rezultati ispitivanja zavisnosti koeficijenata prolaza toplote prekrivke plastenika od Nuseltovog i Rejlijevog broja, odnosno od nastupa prirodne konvekcije u vazdušnom sloju koji se nalazi između dve folije. Zavisnost je ispitivana za različite vrednosti njihovih temperatura, debljine sloja vazduha i ugla nagiba dvoslojne prekrivke u odnosu na horizontalnu ravan.
PB  - Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS), Beograd
T2  - Klimatizacija, grejanje, hlađenje
T1  - Analysis of the air layer thickness influence on heat transfer coefficient of two-layer foil cover
T1  - Analiza uticaja debljine vazdušnog međusloja na koeficijent prelaza toplote dvoslojne prekrivke plastenika
EP  - 27
IS  - 2
SP  - 23
VL  - 31
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_482
ER  - 

@article{
author = "Ećim, Olivera and Todorović, Marija S.",
year = "2002",
abstract = "The investigation results of the heat transfer coefficients dependence on Nu and Ra numbers and natural convection onset in air layer within two plastic foils have been presented in this paper. The dependence has been investigated for different values of foil temperature differences, thickness of air layer and the angle of inclination of the two-layer foil cover towards the horizontal plane., U radu su izloženi rezultati ispitivanja zavisnosti koeficijenata prolaza toplote prekrivke plastenika od Nuseltovog i Rejlijevog broja, odnosno od nastupa prirodne konvekcije u vazdušnom sloju koji se nalazi između dve folije. Zavisnost je ispitivana za različite vrednosti njihovih temperatura, debljine sloja vazduha i ugla nagiba dvoslojne prekrivke u odnosu na horizontalnu ravan.",
publisher = "Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS), Beograd",
journal = "Klimatizacija, grejanje, hlađenje",
title = "Analysis of the air layer thickness influence on heat transfer coefficient of two-layer foil cover, Analiza uticaja debljine vazdušnog međusloja na koeficijent prelaza toplote dvoslojne prekrivke plastenika",
pages = "27-23",
number = "2",
volume = "31",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_482"
}

Ećim, O.,& Todorović, M. S.. (2002). Analysis of the air layer thickness influence on heat transfer coefficient of two-layer foil cover. in Klimatizacija, grejanje, hlađenje
Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS), Beograd., 31(2), 23-27.
https://hdl.handle.net/21.15107/rcub_agrospace_482

Ećim O, Todorović MS. Analysis of the air layer thickness influence on heat transfer coefficient of two-layer foil cover. in Klimatizacija, grejanje, hlađenje. 2002;31(2):23-27.
https://hdl.handle.net/21.15107/rcub_agrospace_482 .

Ećim, Olivera, Todorović, Marija S., "Analysis of the air layer thickness influence on heat transfer coefficient of two-layer foil cover" in Klimatizacija, grejanje, hlađenje, 31, no. 2 (2002):23-27,
https://hdl.handle.net/21.15107/rcub_agrospace_482 .