TY  - JOUR
AU  - Perić, Milica
AU  - Komatina, Mirko
AU  - Antonijević, Dragi
AU  - Bugarski, Branko
AU  - Dzeletović, Željko S.
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3152
AB  - In this paper "well-to-pump" environmental analysis of pyrolytic diesel from Miscanthus gigantheus is performed. The average annual yield of Miscanthus from III-V year of cultivation on 1 ha of chernozem soil in Serbia (23.5 t) is considered as an input for the process. Two pyrolytic diesel pathways are considered: distributed pyrolytic pathway with external hydrogen production (from natural gas) and integrated pyrolytic pathway with internal hydrogen production (from pyrolytic oil). and are compared to a conventionally produced diesel pathway. The results of the analysis reveal that integrated-internal pyrolytic diesel pathway has lowest resources consumption and lowest pollutant emissions. Compared to conventionally produced diesel, integrated-internal pyrolysis pathway consumes 80% less of fossil fuels, and 92% more of renewables, has 90% lower global warming potential, 30% lower terrestrial acidification potential but 38% higher particulate matter formation potential. Compared to the distributed-external pathway, 88% less fossil fuels, and 36% less renewables are consumed in the integrated-internal pathway, global warming potential is 97% lower, terrestrial acidification is 20% lower, and particulate matter formation is 49% lower. Nevertheless, this pathway has high coal and hydroelectrical power consumption due to electricity production and high emissions of particulate matter, CO2, SOx, and N2O. Another drawback of this production pathway is the low yield of diesel obtained (38% lower than in distributed-external pathway). With this regard, it is still hard to designate production of diesel from fast pyrolysis of Miscanthus as a more environmentally friendly replacement of the conventional production diesel pathway.
PB  - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
T2  - Thermal Science
T1  - Diesel production by fast pyrolysis of miscanthus giganteus, well-to-pump analysis using the greet model
EP  - 378
IS  - 1
SP  - 365
VL  - 23
DO  - 10.2298/TSCI171215113P
ER  - 

@article{
author = "Perić, Milica and Komatina, Mirko and Antonijević, Dragi and Bugarski, Branko and Dzeletović, Željko S.",
year = "2019",
abstract = "In this paper "well-to-pump" environmental analysis of pyrolytic diesel from Miscanthus gigantheus is performed. The average annual yield of Miscanthus from III-V year of cultivation on 1 ha of chernozem soil in Serbia (23.5 t) is considered as an input for the process. Two pyrolytic diesel pathways are considered: distributed pyrolytic pathway with external hydrogen production (from natural gas) and integrated pyrolytic pathway with internal hydrogen production (from pyrolytic oil). and are compared to a conventionally produced diesel pathway. The results of the analysis reveal that integrated-internal pyrolytic diesel pathway has lowest resources consumption and lowest pollutant emissions. Compared to conventionally produced diesel, integrated-internal pyrolysis pathway consumes 80% less of fossil fuels, and 92% more of renewables, has 90% lower global warming potential, 30% lower terrestrial acidification potential but 38% higher particulate matter formation potential. Compared to the distributed-external pathway, 88% less fossil fuels, and 36% less renewables are consumed in the integrated-internal pathway, global warming potential is 97% lower, terrestrial acidification is 20% lower, and particulate matter formation is 49% lower. Nevertheless, this pathway has high coal and hydroelectrical power consumption due to electricity production and high emissions of particulate matter, CO2, SOx, and N2O. Another drawback of this production pathway is the low yield of diesel obtained (38% lower than in distributed-external pathway). With this regard, it is still hard to designate production of diesel from fast pyrolysis of Miscanthus as a more environmentally friendly replacement of the conventional production diesel pathway.",
publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd",
journal = "Thermal Science",
title = "Diesel production by fast pyrolysis of miscanthus giganteus, well-to-pump analysis using the greet model",
pages = "378-365",
number = "1",
volume = "23",
doi = "10.2298/TSCI171215113P"
}

Perić, M., Komatina, M., Antonijević, D., Bugarski, B.,& Dzeletović, Ž. S.. (2019). Diesel production by fast pyrolysis of miscanthus giganteus, well-to-pump analysis using the greet model. in Thermal Science
Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 23(1), 365-378.
https://doi.org/10.2298/TSCI171215113P

Perić M, Komatina M, Antonijević D, Bugarski B, Dzeletović ŽS. Diesel production by fast pyrolysis of miscanthus giganteus, well-to-pump analysis using the greet model. in Thermal Science. 2019;23(1):365-378.
doi:10.2298/TSCI171215113P .

Perić, Milica, Komatina, Mirko, Antonijević, Dragi, Bugarski, Branko, Dzeletović, Željko S., "Diesel production by fast pyrolysis of miscanthus giganteus, well-to-pump analysis using the greet model" in Thermal Science, 23, no. 1 (2019):365-378,
https://doi.org/10.2298/TSCI171215113P . .

TY  - CONF
AU  - Mitrović, Danica
AU  - Đoković, Nataša
AU  - Životić, Dragana
AU  - Bechtel, Achim
AU  - Sachsenhofer, Reinhard
AU  - Obradović, Marko
AU  - Stojanović, Ksenija
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4833
PB  - Geological Institute and Institute of Organic Chemisrtry with Centre of Phytochemistry of the Bulgarian Academy of Sciences, Sofia
C3  - Workshop “Organic matter transformations in Maritsa Iztok dump materials: view by geochemical proxies”, Sofia, Bulgaria, June 25-28, 2019. Abstract Book, 2019
T1  - Petrographical and biomarker study of lignite lithotypes and sublithotypes of xylite-rich coal (Kolubara Basin, Serbia)
EP  - 15
SP  - 14
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4833
ER  - 

@conference{
author = "Mitrović, Danica and Đoković, Nataša and Životić, Dragana and Bechtel, Achim and Sachsenhofer, Reinhard and Obradović, Marko and Stojanović, Ksenija",
year = "2019",
publisher = "Geological Institute and Institute of Organic Chemisrtry with Centre of Phytochemistry of the Bulgarian Academy of Sciences, Sofia",
journal = "Workshop “Organic matter transformations in Maritsa Iztok dump materials: view by geochemical proxies”, Sofia, Bulgaria, June 25-28, 2019. Abstract Book, 2019",
title = "Petrographical and biomarker study of lignite lithotypes and sublithotypes of xylite-rich coal (Kolubara Basin, Serbia)",
pages = "15-14",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4833"
}

Mitrović, D., Đoković, N., Životić, D., Bechtel, A., Sachsenhofer, R., Obradović, M.,& Stojanović, K.. (2019). Petrographical and biomarker study of lignite lithotypes and sublithotypes of xylite-rich coal (Kolubara Basin, Serbia). in Workshop “Organic matter transformations in Maritsa Iztok dump materials: view by geochemical proxies”, Sofia, Bulgaria, June 25-28, 2019. Abstract Book, 2019
Geological Institute and Institute of Organic Chemisrtry with Centre of Phytochemistry of the Bulgarian Academy of Sciences, Sofia., 14-15.
https://hdl.handle.net/21.15107/rcub_machinery_4833

Mitrović D, Đoković N, Životić D, Bechtel A, Sachsenhofer R, Obradović M, Stojanović K. Petrographical and biomarker study of lignite lithotypes and sublithotypes of xylite-rich coal (Kolubara Basin, Serbia). in Workshop “Organic matter transformations in Maritsa Iztok dump materials: view by geochemical proxies”, Sofia, Bulgaria, June 25-28, 2019. Abstract Book, 2019. 2019;:14-15.
https://hdl.handle.net/21.15107/rcub_machinery_4833 .

Mitrović, Danica, Đoković, Nataša, Životić, Dragana, Bechtel, Achim, Sachsenhofer, Reinhard, Obradović, Marko, Stojanović, Ksenija, "Petrographical and biomarker study of lignite lithotypes and sublithotypes of xylite-rich coal (Kolubara Basin, Serbia)" in Workshop “Organic matter transformations in Maritsa Iztok dump materials: view by geochemical proxies”, Sofia, Bulgaria, June 25-28, 2019. Abstract Book, 2019 (2019):14-15,
https://hdl.handle.net/21.15107/rcub_machinery_4833 .

TY  - JOUR
AU  - Perić, Milica
AU  - Komatina, Mirko
AU  - Antonijević, Dragi
AU  - Bugarski, Branko
AU  - Dzeletović, Željko
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2872
AB  - This paper investigates the environmental impacts and energy benefits of the cultivation of Miscanthus (Miscanthus x giganteus Greef et Deu.), in order to initiate its use in sustainable household heating in the Republic of Serbia. Based on the analysis of available data regarding the use of agricultural machinery in Serbia, a Miscanthus supply chain is constructed and examined in detail, scrutinizing all relevant operationsfrom planting of rhizomes to thermal energy production. Results of the life cycle assessment identify the briquetting process as the most environmentally burdensome operation due to high electricity consumption and low productivity. It is concluded that an average yield of 23.5 t dry matter (d.m.) year(-1) obtained from 1 ha of chernozem soil would have energy output:energy input (EO:EI) ratio of 51:1, and would release 365.5 gigajoules (GJ) of heat during combustion in a boiler. With this amount of energy, around 383 m(2) of a free-standing family house in Serbia can be heated annually. The same amount of energy is obtained by the combustion of 22 t of lignite or 23 t of wood logs. The substitution of lignite and wood with Miscanthus briquettes would lead to significant reduction of CO2 equivalents (eq), SO2 eq, P eq, N eq, 1,4 dichlorobenzene (1,4-DB) eq, Non-methane volatile organic compound (NMVOC), PM10 eq and U235 eq emissions. This designates Miscanthus as a more sustainable energy solution for household heating. In instances where more modern agricultural machinery is used, emission reduction is higher, except for CO2 eq due to higher emission factors predicted for more powerful engines. Depending on Miscanthus' annual yield, the replacement of set-aside land with Miscanthus plantations result in carbon (C) sequestration from 0.08 t C ha(-1) year(-1) to 0.91 t C ha(-1) year(-1). In a modern machinery scenario, C sequestration is only attainable when maximal Miscanthus yield is obtained. The combined use of machinery with different engine power is the best option for Miscanthus cultivation in Serbia.
PB  - MDPI, Basel
T2  - Forests
T1  - Life Cycle Impact Assessment of Miscanthus Crop for Sustainable Household Heating in Serbia
IS  - 10
VL  - 9
DO  - 10.3390/f9100654
ER  - 

@article{
author = "Perić, Milica and Komatina, Mirko and Antonijević, Dragi and Bugarski, Branko and Dzeletović, Željko",
year = "2018",
abstract = "This paper investigates the environmental impacts and energy benefits of the cultivation of Miscanthus (Miscanthus x giganteus Greef et Deu.), in order to initiate its use in sustainable household heating in the Republic of Serbia. Based on the analysis of available data regarding the use of agricultural machinery in Serbia, a Miscanthus supply chain is constructed and examined in detail, scrutinizing all relevant operationsfrom planting of rhizomes to thermal energy production. Results of the life cycle assessment identify the briquetting process as the most environmentally burdensome operation due to high electricity consumption and low productivity. It is concluded that an average yield of 23.5 t dry matter (d.m.) year(-1) obtained from 1 ha of chernozem soil would have energy output:energy input (EO:EI) ratio of 51:1, and would release 365.5 gigajoules (GJ) of heat during combustion in a boiler. With this amount of energy, around 383 m(2) of a free-standing family house in Serbia can be heated annually. The same amount of energy is obtained by the combustion of 22 t of lignite or 23 t of wood logs. The substitution of lignite and wood with Miscanthus briquettes would lead to significant reduction of CO2 equivalents (eq), SO2 eq, P eq, N eq, 1,4 dichlorobenzene (1,4-DB) eq, Non-methane volatile organic compound (NMVOC), PM10 eq and U235 eq emissions. This designates Miscanthus as a more sustainable energy solution for household heating. In instances where more modern agricultural machinery is used, emission reduction is higher, except for CO2 eq due to higher emission factors predicted for more powerful engines. Depending on Miscanthus' annual yield, the replacement of set-aside land with Miscanthus plantations result in carbon (C) sequestration from 0.08 t C ha(-1) year(-1) to 0.91 t C ha(-1) year(-1). In a modern machinery scenario, C sequestration is only attainable when maximal Miscanthus yield is obtained. The combined use of machinery with different engine power is the best option for Miscanthus cultivation in Serbia.",
publisher = "MDPI, Basel",
journal = "Forests",
title = "Life Cycle Impact Assessment of Miscanthus Crop for Sustainable Household Heating in Serbia",
number = "10",
volume = "9",
doi = "10.3390/f9100654"
}

Perić, M., Komatina, M., Antonijević, D., Bugarski, B.,& Dzeletović, Ž.. (2018). Life Cycle Impact Assessment of Miscanthus Crop for Sustainable Household Heating in Serbia. in Forests
MDPI, Basel., 9(10).
https://doi.org/10.3390/f9100654

Perić M, Komatina M, Antonijević D, Bugarski B, Dzeletović Ž. Life Cycle Impact Assessment of Miscanthus Crop for Sustainable Household Heating in Serbia. in Forests. 2018;9(10).
doi:10.3390/f9100654 .

Perić, Milica, Komatina, Mirko, Antonijević, Dragi, Bugarski, Branko, Dzeletović, Željko, "Life Cycle Impact Assessment of Miscanthus Crop for Sustainable Household Heating in Serbia" in Forests, 9, no. 10 (2018),
https://doi.org/10.3390/f9100654 . .

TY  - JOUR
AU  - Lalošević, Marija
AU  - Komatina, Mirko
AU  - Miloš, Marko
AU  - Rudonja, Nedžad
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2790
AB  - The effect of extensive and intensive green roofs on improving outdoor microclimate parameters of urban built environments is currently a worldwide focus of research. Due to the lack of reliable data for Belgrade, the impact of extensive and intensive green roof systems on mitigating the effects of urban heat islands and improving microclimatic conditions by utilizing high albedo materials in public spaces were studied. Research was conducted on four chosen urban units within existing residential blocks in the city that were representative of typical urban planning and construction within the Belgrade metropolitan area. Five different models (baseline model and four potential models of retrofitting) were designed, for which the temperature changes at pedestrian and roof levels at 07:00, 13:00, 19:00 h, on a typical summer day, and at 01:00 h, the following night in Belgrade were investigated. The ENVI-met software was used to model the simulations. The results of numerical modeling showed that utilizing green roofs in the Belgrade climatic area could reduce air temperatures in the surroundings up to 0.47, 1.51, 1.60, 1.80 degrees C at pedestrian level and up to 0.53, 1.45, 0.90, 1.45 degrees C at roof level for four potential retrofitting strategies, respectively.
PB  - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
T2  - Thermal Science
T1  - Green roofs and cool materials as retrofitting strategies for urban heat island mitigation case study in Belgrade, Serbia
EP  - 2324
IS  - 6
SP  - 2309
VL  - 22
DO  - 10.2298/TSCI171120086L
ER  - 

@article{
author = "Lalošević, Marija and Komatina, Mirko and Miloš, Marko and Rudonja, Nedžad",
year = "2018",
abstract = "The effect of extensive and intensive green roofs on improving outdoor microclimate parameters of urban built environments is currently a worldwide focus of research. Due to the lack of reliable data for Belgrade, the impact of extensive and intensive green roof systems on mitigating the effects of urban heat islands and improving microclimatic conditions by utilizing high albedo materials in public spaces were studied. Research was conducted on four chosen urban units within existing residential blocks in the city that were representative of typical urban planning and construction within the Belgrade metropolitan area. Five different models (baseline model and four potential models of retrofitting) were designed, for which the temperature changes at pedestrian and roof levels at 07:00, 13:00, 19:00 h, on a typical summer day, and at 01:00 h, the following night in Belgrade were investigated. The ENVI-met software was used to model the simulations. The results of numerical modeling showed that utilizing green roofs in the Belgrade climatic area could reduce air temperatures in the surroundings up to 0.47, 1.51, 1.60, 1.80 degrees C at pedestrian level and up to 0.53, 1.45, 0.90, 1.45 degrees C at roof level for four potential retrofitting strategies, respectively.",
publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd",
journal = "Thermal Science",
title = "Green roofs and cool materials as retrofitting strategies for urban heat island mitigation case study in Belgrade, Serbia",
pages = "2324-2309",
number = "6",
volume = "22",
doi = "10.2298/TSCI171120086L"
}

Lalošević, M., Komatina, M., Miloš, M.,& Rudonja, N.. (2018). Green roofs and cool materials as retrofitting strategies for urban heat island mitigation case study in Belgrade, Serbia. in Thermal Science
Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 22(6), 2309-2324.
https://doi.org/10.2298/TSCI171120086L

Lalošević M, Komatina M, Miloš M, Rudonja N. Green roofs and cool materials as retrofitting strategies for urban heat island mitigation case study in Belgrade, Serbia. in Thermal Science. 2018;22(6):2309-2324.
doi:10.2298/TSCI171120086L .

Lalošević, Marija, Komatina, Mirko, Miloš, Marko, Rudonja, Nedžad, "Green roofs and cool materials as retrofitting strategies for urban heat island mitigation case study in Belgrade, Serbia" in Thermal Science, 22, no. 6 (2018):2309-2324,
https://doi.org/10.2298/TSCI171120086L . .

TY  - JOUR
AU  - Rudonja, Nedžad
AU  - Komatina, Mirko
AU  - Antonijević, Dragi
AU  - Živković, Goran
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2295
AB  - Precise understanding of heat transfer processes inside the latent thermal energy storage exposed to different initial and boundary conditions is crucial for development of optimized design and operating features of similar devices. The paper presents 3D numerical study of phase change material heat storage in the shape of vertical cylinder reservoir with axially placed heat source/sink equipped with variable number of conductance enhancing longitudinal rectangular fins. As the principally important observed is the case of vertically variable heat flux supplied to the phase change material during the melting process. The numerical modeling is based on the physical model of the process and is being carried out by Fluent software that uses finite volume method for solving continuity, momentum and energy equations. The coupling between pressure and velocity is based on the Semi- Implicit Pressure- Linked Equation (SIMPLE) algorithm. The results of numerical simulations are verified through the comparison with the own experimental results. Exemplary results for characteristic heat storage geometries and boundary conditions are presented and analyzed in the paper.
PB  - Bulgarian Acad Science, Sofia
T2  - Bulgarian Chemical Communications
T1  - Numerical simulation of latent heat storage with conductance enhancing fins
EP  - 205
SP  - 199
VL  - 48
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7151
ER  - 

@article{
author = "Rudonja, Nedžad and Komatina, Mirko and Antonijević, Dragi and Živković, Goran",
year = "2016",
abstract = "Precise understanding of heat transfer processes inside the latent thermal energy storage exposed to different initial and boundary conditions is crucial for development of optimized design and operating features of similar devices. The paper presents 3D numerical study of phase change material heat storage in the shape of vertical cylinder reservoir with axially placed heat source/sink equipped with variable number of conductance enhancing longitudinal rectangular fins. As the principally important observed is the case of vertically variable heat flux supplied to the phase change material during the melting process. The numerical modeling is based on the physical model of the process and is being carried out by Fluent software that uses finite volume method for solving continuity, momentum and energy equations. The coupling between pressure and velocity is based on the Semi- Implicit Pressure- Linked Equation (SIMPLE) algorithm. The results of numerical simulations are verified through the comparison with the own experimental results. Exemplary results for characteristic heat storage geometries and boundary conditions are presented and analyzed in the paper.",
publisher = "Bulgarian Acad Science, Sofia",
journal = "Bulgarian Chemical Communications",
title = "Numerical simulation of latent heat storage with conductance enhancing fins",
pages = "205-199",
volume = "48",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7151"
}

Rudonja, N., Komatina, M., Antonijević, D.,& Živković, G.. (2016). Numerical simulation of latent heat storage with conductance enhancing fins. in Bulgarian Chemical Communications
Bulgarian Acad Science, Sofia., 48, 199-205.
https://hdl.handle.net/21.15107/rcub_vinar_7151

Rudonja N, Komatina M, Antonijević D, Živković G. Numerical simulation of latent heat storage with conductance enhancing fins. in Bulgarian Chemical Communications. 2016;48:199-205.
https://hdl.handle.net/21.15107/rcub_vinar_7151 .

Rudonja, Nedžad, Komatina, Mirko, Antonijević, Dragi, Živković, Goran, "Numerical simulation of latent heat storage with conductance enhancing fins" in Bulgarian Chemical Communications, 48 (2016):199-205,
https://hdl.handle.net/21.15107/rcub_vinar_7151 .

TY  - JOUR
AU  - Rudonja, Nedžad
AU  - Komatina, Mirko
AU  - Živković, Goran
AU  - Antonijević, Dragi
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2396
AB  - Enhancement of heat transfer over a cylinder shaped thermal energy storage filled by paraffin E53 by use of longitudinal rectangular copper fins was analyzed. The thermo-physical features of the storage material are determined in separate experiments and implemented to FLUENT software over user defined function. Advanced thermal storage geometry comprehension and optimization required introduction of a parameter suitable for the analysis of heat transfer enhancement, so the ratio of heat transfer surfaces as a factor was proposed and applied. It is revealed that increase of the ratio of heat transfer surfaces leads to the decrease of melting time and vice versa. Numerical analysis, employing the 3-D model built in Ansys software, observed storage reservoir geometries with variable number of longitudinal fins. The adjusted set of boundary conditions was carried out and both written in C language and implemented over user defined function in order to define variable heat flux along the height of the heater. The comparison of acquired numerical and experimental results showed a strong correlation. Experimental validation of numerical results was done on the real thermal energy storage apparatus.
PB  - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
T2  - Thermal Science
T1  - Heat transfer enhancement through pcm thermal storage by use of copper fins
EP  - s259
SP  - s251
VL  - 20
DO  - 10.2298/TSC1150729136R
ER  - 

@article{
author = "Rudonja, Nedžad and Komatina, Mirko and Živković, Goran and Antonijević, Dragi",
year = "2016",
abstract = "Enhancement of heat transfer over a cylinder shaped thermal energy storage filled by paraffin E53 by use of longitudinal rectangular copper fins was analyzed. The thermo-physical features of the storage material are determined in separate experiments and implemented to FLUENT software over user defined function. Advanced thermal storage geometry comprehension and optimization required introduction of a parameter suitable for the analysis of heat transfer enhancement, so the ratio of heat transfer surfaces as a factor was proposed and applied. It is revealed that increase of the ratio of heat transfer surfaces leads to the decrease of melting time and vice versa. Numerical analysis, employing the 3-D model built in Ansys software, observed storage reservoir geometries with variable number of longitudinal fins. The adjusted set of boundary conditions was carried out and both written in C language and implemented over user defined function in order to define variable heat flux along the height of the heater. The comparison of acquired numerical and experimental results showed a strong correlation. Experimental validation of numerical results was done on the real thermal energy storage apparatus.",
publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd",
journal = "Thermal Science",
title = "Heat transfer enhancement through pcm thermal storage by use of copper fins",
pages = "s259-s251",
volume = "20",
doi = "10.2298/TSC1150729136R"
}

Rudonja, N., Komatina, M., Živković, G.,& Antonijević, D.. (2016). Heat transfer enhancement through pcm thermal storage by use of copper fins. in Thermal Science
Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 20, s251-s259.
https://doi.org/10.2298/TSC1150729136R

Rudonja N, Komatina M, Živković G, Antonijević D. Heat transfer enhancement through pcm thermal storage by use of copper fins. in Thermal Science. 2016;20:s251-s259.
doi:10.2298/TSC1150729136R .

Rudonja, Nedžad, Komatina, Mirko, Živković, Goran, Antonijević, Dragi, "Heat transfer enhancement through pcm thermal storage by use of copper fins" in Thermal Science, 20 (2016):s251-s259,
https://doi.org/10.2298/TSC1150729136R . .

TY  - CONF
AU  - Radojković, B.
AU  - Ristić, S.
AU  - Polić, Suzana
AU  - Krmpot, A.
AU  - Salatić, B.
AU  - Orlić, J.
AU  - Vučetić, Filip
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2328
AB  - The use of lasers in the conservation of artefacts plays an important role since its posibilities of safe, efficient and efective cleaning on complex surfaces and wide range of materials. This paper presents the results of the laser cleaning effects on ceramic medieval artefacts originated from archaeological sites from region of Tyre and Sidon, Lebanon and naturally tarnished brass plate (unknown origin). Nd: YAG and Er: Glass lasers were used to clean unwanted layers from artefact surface. Before these investigations, some preliminary analyses were conducted on the comparable contemporary samples. Effects on the laser irradiated zones were investigated by optical and SEM microscopy and EDX analysis. LIBS and XRF were used for the morphological and chemical analysis of laser radiation impact on the examined materials. Also surface's profile roughness and surface hardness were measured. Some parameters for successfully and safely cleaning of brass surface without degrading the surrounding material were determined.
PB  - IMEKO-International Measurement Federation Secretariat
C3  - IMEKO International Conference on Metrology for Archeology and Cultural Heritage, MetroArcheo 2016
T1  - XRF and LIBS measuring on metal and ceramic laser-cleaned surfaces
EP  - 76
SP  - 71
VL  - 2016-October
UR  - https://hdl.handle.net/21.15107/rcub_machinery_2328
ER  - 

@conference{
author = "Radojković, B. and Ristić, S. and Polić, Suzana and Krmpot, A. and Salatić, B. and Orlić, J. and Vučetić, Filip",
year = "2016",
abstract = "The use of lasers in the conservation of artefacts plays an important role since its posibilities of safe, efficient and efective cleaning on complex surfaces and wide range of materials. This paper presents the results of the laser cleaning effects on ceramic medieval artefacts originated from archaeological sites from region of Tyre and Sidon, Lebanon and naturally tarnished brass plate (unknown origin). Nd: YAG and Er: Glass lasers were used to clean unwanted layers from artefact surface. Before these investigations, some preliminary analyses were conducted on the comparable contemporary samples. Effects on the laser irradiated zones were investigated by optical and SEM microscopy and EDX analysis. LIBS and XRF were used for the morphological and chemical analysis of laser radiation impact on the examined materials. Also surface's profile roughness and surface hardness were measured. Some parameters for successfully and safely cleaning of brass surface without degrading the surrounding material were determined.",
publisher = "IMEKO-International Measurement Federation Secretariat",
journal = "IMEKO International Conference on Metrology for Archeology and Cultural Heritage, MetroArcheo 2016",
title = "XRF and LIBS measuring on metal and ceramic laser-cleaned surfaces",
pages = "76-71",
volume = "2016-October",
url = "https://hdl.handle.net/21.15107/rcub_machinery_2328"
}

Radojković, B., Ristić, S., Polić, S., Krmpot, A., Salatić, B., Orlić, J.,& Vučetić, F.. (2016). XRF and LIBS measuring on metal and ceramic laser-cleaned surfaces. in IMEKO International Conference on Metrology for Archeology and Cultural Heritage, MetroArcheo 2016
IMEKO-International Measurement Federation Secretariat., 2016-October, 71-76.
https://hdl.handle.net/21.15107/rcub_machinery_2328

Radojković B, Ristić S, Polić S, Krmpot A, Salatić B, Orlić J, Vučetić F. XRF and LIBS measuring on metal and ceramic laser-cleaned surfaces. in IMEKO International Conference on Metrology for Archeology and Cultural Heritage, MetroArcheo 2016. 2016;2016-October:71-76.
https://hdl.handle.net/21.15107/rcub_machinery_2328 .

Radojković, B., Ristić, S., Polić, Suzana, Krmpot, A., Salatić, B., Orlić, J., Vučetić, Filip, "XRF and LIBS measuring on metal and ceramic laser-cleaned surfaces" in IMEKO International Conference on Metrology for Archeology and Cultural Heritage, MetroArcheo 2016, 2016-October (2016):71-76,
https://hdl.handle.net/21.15107/rcub_machinery_2328 .

TY  - JOUR
AU  - Erić, Aleksandar
AU  - Komatina, Mirko
AU  - Nemoda, Stevan
AU  - Dakić, Dragoljub
AU  - Repić, Branislav
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2413
AB  - Modeling of transport phenomena in materials with porous bed features requires thermophysical properties, such as porosity, permeability and thermal conductivity be known. The paper presents experimental data obtained in the course of investigation focused on analysis of stagnant thermal conductivity of biomass. Experiments were conducted using a custom designed and constructed experimental setup and implementing original experimental procedure. Results obtained enabled stagnant thermal conductivity of biomass to be determined for different biomass porosity values. Analysis of the experimental data enabled functional dependence of stagnant thermal conductivity on porosity to be determined, with porosity varied in a range 0.50-0.85. Results obtained indicate that reduced bed porosity, down to the value of 0.65, causes stagnant thermal conductivity of the bed to be reduced. Further porosity reduction, below the value of 0.65, results in increased stagnant thermal conductivity of the bed. Experimental procedure developed shall be useful for gathering experimental data on different materials planned to be analyzed when examining transport phenomena occurring during combustion of biomass bales. In addition, data to be acquired shall be helpful in modeling the transport phenomena associated with combustion in porous beds.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Renewable & Sustainable Energy Reviews
T1  - Determination of thermal conductivity of baled agricultural biomass
EP  - 884
SP  - 876
VL  - 58
DO  - 10.1016/j.rser.2015.12.066
ER  - 

@article{
author = "Erić, Aleksandar and Komatina, Mirko and Nemoda, Stevan and Dakić, Dragoljub and Repić, Branislav",
year = "2016",
abstract = "Modeling of transport phenomena in materials with porous bed features requires thermophysical properties, such as porosity, permeability and thermal conductivity be known. The paper presents experimental data obtained in the course of investigation focused on analysis of stagnant thermal conductivity of biomass. Experiments were conducted using a custom designed and constructed experimental setup and implementing original experimental procedure. Results obtained enabled stagnant thermal conductivity of biomass to be determined for different biomass porosity values. Analysis of the experimental data enabled functional dependence of stagnant thermal conductivity on porosity to be determined, with porosity varied in a range 0.50-0.85. Results obtained indicate that reduced bed porosity, down to the value of 0.65, causes stagnant thermal conductivity of the bed to be reduced. Further porosity reduction, below the value of 0.65, results in increased stagnant thermal conductivity of the bed. Experimental procedure developed shall be useful for gathering experimental data on different materials planned to be analyzed when examining transport phenomena occurring during combustion of biomass bales. In addition, data to be acquired shall be helpful in modeling the transport phenomena associated with combustion in porous beds.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Renewable & Sustainable Energy Reviews",
title = "Determination of thermal conductivity of baled agricultural biomass",
pages = "884-876",
volume = "58",
doi = "10.1016/j.rser.2015.12.066"
}

Erić, A., Komatina, M., Nemoda, S., Dakić, D.,& Repić, B.. (2016). Determination of thermal conductivity of baled agricultural biomass. in Renewable & Sustainable Energy Reviews
Pergamon-Elsevier Science Ltd, Oxford., 58, 876-884.
https://doi.org/10.1016/j.rser.2015.12.066

Erić A, Komatina M, Nemoda S, Dakić D, Repić B. Determination of thermal conductivity of baled agricultural biomass. in Renewable & Sustainable Energy Reviews. 2016;58:876-884.
doi:10.1016/j.rser.2015.12.066 .

Erić, Aleksandar, Komatina, Mirko, Nemoda, Stevan, Dakić, Dragoljub, Repić, Branislav, "Determination of thermal conductivity of baled agricultural biomass" in Renewable & Sustainable Energy Reviews, 58 (2016):876-884,
https://doi.org/10.1016/j.rser.2015.12.066 . .

TY  - JOUR
AU  - Arsović, Marjan
AU  - Topić, Radivoje M.
AU  - Komatina, Mirko
AU  - Gojak, Milan
PY  - 2015
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2211
AB  - Many regions of the world face the problem of saline water. Water desalination processes, which require significant energy consumption, are a common solution to produce drinking water. This study evaluated the influence of the following process operational parameters on the energy consumption of seawater reverse osmosis systems: water salinity, permeate recovery ratio, membrane performance, and feed water temperature. Optimal operational conditions for the theoretical minimum energy consumption were determined with experiments by varying water qualities and operational parameters. In order to further reduce energy consumption a reverse osmosis system was integrated with a photovoltaic solar system and a pilot photovoltaic reverse osmosis system was built and tested The results obtained from this study indicated that even though a solar photovoltaic system incurs a huge initial capital investment, it will yield significant benefits in the long run of the reverse osmosis operational period
PB  - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
T2  - Thermal Science
T1  - Thermodynamical research of using solar energy for desalination of seawater
EP  - 1721
IS  - 5
SP  - 1709
VL  - 19
DO  - 10.2298/TSCI141220074A
ER  - 

@article{
author = "Arsović, Marjan and Topić, Radivoje M. and Komatina, Mirko and Gojak, Milan",
year = "2015",
abstract = "Many regions of the world face the problem of saline water. Water desalination processes, which require significant energy consumption, are a common solution to produce drinking water. This study evaluated the influence of the following process operational parameters on the energy consumption of seawater reverse osmosis systems: water salinity, permeate recovery ratio, membrane performance, and feed water temperature. Optimal operational conditions for the theoretical minimum energy consumption were determined with experiments by varying water qualities and operational parameters. In order to further reduce energy consumption a reverse osmosis system was integrated with a photovoltaic solar system and a pilot photovoltaic reverse osmosis system was built and tested The results obtained from this study indicated that even though a solar photovoltaic system incurs a huge initial capital investment, it will yield significant benefits in the long run of the reverse osmosis operational period",
publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd",
journal = "Thermal Science",
title = "Thermodynamical research of using solar energy for desalination of seawater",
pages = "1721-1709",
number = "5",
volume = "19",
doi = "10.2298/TSCI141220074A"
}

Arsović, M., Topić, R. M., Komatina, M.,& Gojak, M.. (2015). Thermodynamical research of using solar energy for desalination of seawater. in Thermal Science
Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 19(5), 1709-1721.
https://doi.org/10.2298/TSCI141220074A

Arsović M, Topić RM, Komatina M, Gojak M. Thermodynamical research of using solar energy for desalination of seawater. in Thermal Science. 2015;19(5):1709-1721.
doi:10.2298/TSCI141220074A .

Arsović, Marjan, Topić, Radivoje M., Komatina, Mirko, Gojak, Milan, "Thermodynamical research of using solar energy for desalination of seawater" in Thermal Science, 19, no. 5 (2015):1709-1721,
https://doi.org/10.2298/TSCI141220074A . .

TY  - JOUR
AU  - Životić, Dragana
AU  - Bechtel, Achim
AU  - Sachsenhofer, Rainhard
AU  - Gratzer, Rainhard
AU  - Radić, Dejan
AU  - Obradović, Marko
AU  - Stojanović, Ksenija
PY  - 2014
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1924
AB  - The influence of different coal lithotypes on grindability has been investigated using lignite from two of the most important Upper Miocene lignite basins in Serbia (Kolubara and Kostolac). Yellow xylite-rich types demonstrated the most negative impact on Hardgrove Grindability Index (HGI). All different types of xylite-rich coal, as well as total xylite-rich coal from the Kolubara basin have a negative influence on the grindability properties, while only the yellow type of xylite-rich coal from the Kostolac showed a negative impact on HGI. Matrix coal does not show a clear effect on HGI. A negative correlation between textinite content and HGI is observed in both basins, whereas contents of other macerals do not show influence on grindability properties. Content of total organic carbon demonstrated the negative impact on HGI. Correlation analysis indicates that the negative impact of the yellow type of xylite-rich coal and the sum of total xylite-rich coal on the grindability properties partly can be related to content of total organic carbon and high amount of soluble organic matter. Matrix lithotype does not show any significant correlation with bulk geochemical parameters in both basins. The peat-forming vegetation of all samples from both basins were dominated by decay-resistant gymnosperm (coniferous) plants, belonging to one or several of the families Taxodiaceae, Podocarpaceae, Cupressaceae, Araucariaceae, Phyllocladaceae and Pinaceae. Lignite from the Kolubara basin is characterized by a higher contribution of angiosperm vegetation than coal from the Kostolac basin. Peatification of the Kolubara coal occurred under more oxic conditions than the Kostolac one. Analysis of biomarkers indicated that the negative impact of all types of xylite-rich coal from the Kolubara on HGI can be related to the higher proportion of angiosperms, abundance of mid-chain n-alkanes and sesquiterpenoids, aromatization of non-hopanoid triterpenoids and hopanoids, and intense degradation of wood tissues in a more oxic environment. The positive impact of matrix coal on HGI in the Kolubara samples can be attributed to elevated content of non-aromatic hopanoids and low amounts of aromatic non-hopanoid triterpenoids and sesquiterpenoids, which seems to hinder the grindability properties.
PB  - Elsevier, Amsterdam
T2  - International Journal of Coal Geology
T1  - Petrological and organic geochemical properties of lignite from the Kolubara and Kostolac basins, Serbia: Implication on Grindability Index
EP  - 362
SP  - 344
VL  - 131
DO  - 10.1016/j.coal.2014.07.004
ER  - 

@article{
author = "Životić, Dragana and Bechtel, Achim and Sachsenhofer, Rainhard and Gratzer, Rainhard and Radić, Dejan and Obradović, Marko and Stojanović, Ksenija",
year = "2014",
abstract = "The influence of different coal lithotypes on grindability has been investigated using lignite from two of the most important Upper Miocene lignite basins in Serbia (Kolubara and Kostolac). Yellow xylite-rich types demonstrated the most negative impact on Hardgrove Grindability Index (HGI). All different types of xylite-rich coal, as well as total xylite-rich coal from the Kolubara basin have a negative influence on the grindability properties, while only the yellow type of xylite-rich coal from the Kostolac showed a negative impact on HGI. Matrix coal does not show a clear effect on HGI. A negative correlation between textinite content and HGI is observed in both basins, whereas contents of other macerals do not show influence on grindability properties. Content of total organic carbon demonstrated the negative impact on HGI. Correlation analysis indicates that the negative impact of the yellow type of xylite-rich coal and the sum of total xylite-rich coal on the grindability properties partly can be related to content of total organic carbon and high amount of soluble organic matter. Matrix lithotype does not show any significant correlation with bulk geochemical parameters in both basins. The peat-forming vegetation of all samples from both basins were dominated by decay-resistant gymnosperm (coniferous) plants, belonging to one or several of the families Taxodiaceae, Podocarpaceae, Cupressaceae, Araucariaceae, Phyllocladaceae and Pinaceae. Lignite from the Kolubara basin is characterized by a higher contribution of angiosperm vegetation than coal from the Kostolac basin. Peatification of the Kolubara coal occurred under more oxic conditions than the Kostolac one. Analysis of biomarkers indicated that the negative impact of all types of xylite-rich coal from the Kolubara on HGI can be related to the higher proportion of angiosperms, abundance of mid-chain n-alkanes and sesquiterpenoids, aromatization of non-hopanoid triterpenoids and hopanoids, and intense degradation of wood tissues in a more oxic environment. The positive impact of matrix coal on HGI in the Kolubara samples can be attributed to elevated content of non-aromatic hopanoids and low amounts of aromatic non-hopanoid triterpenoids and sesquiterpenoids, which seems to hinder the grindability properties.",
publisher = "Elsevier, Amsterdam",
journal = "International Journal of Coal Geology",
title = "Petrological and organic geochemical properties of lignite from the Kolubara and Kostolac basins, Serbia: Implication on Grindability Index",
pages = "362-344",
volume = "131",
doi = "10.1016/j.coal.2014.07.004"
}

Životić, D., Bechtel, A., Sachsenhofer, R., Gratzer, R., Radić, D., Obradović, M.,& Stojanović, K.. (2014). Petrological and organic geochemical properties of lignite from the Kolubara and Kostolac basins, Serbia: Implication on Grindability Index. in International Journal of Coal Geology
Elsevier, Amsterdam., 131, 344-362.
https://doi.org/10.1016/j.coal.2014.07.004

Životić D, Bechtel A, Sachsenhofer R, Gratzer R, Radić D, Obradović M, Stojanović K. Petrological and organic geochemical properties of lignite from the Kolubara and Kostolac basins, Serbia: Implication on Grindability Index. in International Journal of Coal Geology. 2014;131:344-362.
doi:10.1016/j.coal.2014.07.004 .

Životić, Dragana, Bechtel, Achim, Sachsenhofer, Rainhard, Gratzer, Rainhard, Radić, Dejan, Obradović, Marko, Stojanović, Ksenija, "Petrological and organic geochemical properties of lignite from the Kolubara and Kostolac basins, Serbia: Implication on Grindability Index" in International Journal of Coal Geology, 131 (2014):344-362,
https://doi.org/10.1016/j.coal.2014.07.004 . .

TY  - JOUR
AU  - Zlatanović, Ivan
AU  - Komatina, Mirko
AU  - Antonijević, Dragi
PY  - 2013
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1680
AB  - The paper presents results of an experimental investigation of convective drying of Idared apple in full recirculation laboratory scale dryer. The experiments were conducted with cube-shaped apple samples (side length 10 and 13 mm), without pre-treatment. The parameters of air stream over the tray with samples were fully controlled and adjusted in several sets of experiments, while always remaining in the following ranges: temperature 35-55 degrees C, relative humidity 10-30%, velocity 1-2 m/s. The drying kinetics of the apple samples was recorded, the results were analyzed and compared to the existing drying models. The analysis of the experimental results enabled derivation of correlations between drying parameters in a form k = f(T,RH), within Henderson & Pabis drying model MR = aexp(-k tau), as well as the calculation of effective moisture diffusivity during the process.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Applied Thermal Engineering
T1  - Low-temperature convective drying of apple cubes
EP  - 123
IS  - 1
SP  - 114
VL  - 53
DO  - 10.1016/j.applthermaleng.2013.01.012
ER  - 

@article{
author = "Zlatanović, Ivan and Komatina, Mirko and Antonijević, Dragi",
year = "2013",
abstract = "The paper presents results of an experimental investigation of convective drying of Idared apple in full recirculation laboratory scale dryer. The experiments were conducted with cube-shaped apple samples (side length 10 and 13 mm), without pre-treatment. The parameters of air stream over the tray with samples were fully controlled and adjusted in several sets of experiments, while always remaining in the following ranges: temperature 35-55 degrees C, relative humidity 10-30%, velocity 1-2 m/s. The drying kinetics of the apple samples was recorded, the results were analyzed and compared to the existing drying models. The analysis of the experimental results enabled derivation of correlations between drying parameters in a form k = f(T,RH), within Henderson & Pabis drying model MR = aexp(-k tau), as well as the calculation of effective moisture diffusivity during the process.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Applied Thermal Engineering",
title = "Low-temperature convective drying of apple cubes",
pages = "123-114",
number = "1",
volume = "53",
doi = "10.1016/j.applthermaleng.2013.01.012"
}

Zlatanović, I., Komatina, M.,& Antonijević, D.. (2013). Low-temperature convective drying of apple cubes. in Applied Thermal Engineering
Pergamon-Elsevier Science Ltd, Oxford., 53(1), 114-123.
https://doi.org/10.1016/j.applthermaleng.2013.01.012

Zlatanović I, Komatina M, Antonijević D. Low-temperature convective drying of apple cubes. in Applied Thermal Engineering. 2013;53(1):114-123.
doi:10.1016/j.applthermaleng.2013.01.012 .

Zlatanović, Ivan, Komatina, Mirko, Antonijević, Dragi, "Low-temperature convective drying of apple cubes" in Applied Thermal Engineering, 53, no. 1 (2013):114-123,
https://doi.org/10.1016/j.applthermaleng.2013.01.012 . .

TY  - JOUR
AU  - Mladenović, Milica R.
AU  - Dakić, Dragoljub
AU  - Nemoda, Stevan
AU  - Mladenović, Rastko
AU  - Erić, Aleksandar M.
AU  - Repić, Branislav
AU  - Komatina, Mirko
PY  - 2012
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1371
AB  - In this paper a method of examination of fuel suitability for fluidized bed combustion is presented. The research of combustion characteristics of low grade fractions of Lubnica brown coal in the fluidized bed by the aforementioned methodology has been carried out on a laboratory semi-industrial apparatus of 200 kWt. Description of the experimental fluidized bed combustion facility is given, as well as experimental results, with the focus on furnace temperature distribution, in order to determine the location of the zone of intensive combustion. Based on investigation results, which are focused on combustion quality (combustion completion) as well as on satisfying the environmental protection criteria, it can be stated that the investigated coal is suitable for burning in bubbling, as well as in circulating fluidized bed.
PB  - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
T2  - Thermal Science
T1  - Combustion of low grade fractions of Lubnica coal in fluidized bed
EP  - 311
IS  - 1
SP  - 297
VL  - 16
DO  - 10.2298/TSCI1201297M
ER  - 

@article{
author = "Mladenović, Milica R. and Dakić, Dragoljub and Nemoda, Stevan and Mladenović, Rastko and Erić, Aleksandar M. and Repić, Branislav and Komatina, Mirko",
year = "2012",
abstract = "In this paper a method of examination of fuel suitability for fluidized bed combustion is presented. The research of combustion characteristics of low grade fractions of Lubnica brown coal in the fluidized bed by the aforementioned methodology has been carried out on a laboratory semi-industrial apparatus of 200 kWt. Description of the experimental fluidized bed combustion facility is given, as well as experimental results, with the focus on furnace temperature distribution, in order to determine the location of the zone of intensive combustion. Based on investigation results, which are focused on combustion quality (combustion completion) as well as on satisfying the environmental protection criteria, it can be stated that the investigated coal is suitable for burning in bubbling, as well as in circulating fluidized bed.",
publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd",
journal = "Thermal Science",
title = "Combustion of low grade fractions of Lubnica coal in fluidized bed",
pages = "311-297",
number = "1",
volume = "16",
doi = "10.2298/TSCI1201297M"
}

Mladenović, M. R., Dakić, D., Nemoda, S., Mladenović, R., Erić, A. M., Repić, B.,& Komatina, M.. (2012). Combustion of low grade fractions of Lubnica coal in fluidized bed. in Thermal Science
Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 16(1), 297-311.
https://doi.org/10.2298/TSCI1201297M

Mladenović MR, Dakić D, Nemoda S, Mladenović R, Erić AM, Repić B, Komatina M. Combustion of low grade fractions of Lubnica coal in fluidized bed. in Thermal Science. 2012;16(1):297-311.
doi:10.2298/TSCI1201297M .

Mladenović, Milica R., Dakić, Dragoljub, Nemoda, Stevan, Mladenović, Rastko, Erić, Aleksandar M., Repić, Branislav, Komatina, Mirko, "Combustion of low grade fractions of Lubnica coal in fluidized bed" in Thermal Science, 16, no. 1 (2012):297-311,
https://doi.org/10.2298/TSCI1201297M . .

TY  - JOUR
AU  - Antonijević, Dragi
AU  - Manić, Dimitrije
AU  - Komatina, Mirko
AU  - Rudonja, Nedžad
PY  - 2012
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1504
AB  - Retrofitting of fossil fuel powered hot water radiator heating systems of the existing buildings by groundwater heat pumps can provide significant energy savings followed by economic and environmental benefits. The paper describes the procedure for selection of optimal low-temperature groundwater heat pump vapor compression cycle based on thermodynamic analysis of applied high temperature heat pump heating system. In comparative energy and exergy analysis observed are six different heating cycles, five of which utilize two-stage refrigerant compression, and one operate as basic one-stage heat pump system with an auxiliary heater. The systems validation is performed accounting strongly for the boundary conditions of the selected location.
PB  - Elsevier Science Sa, Lausanne
T2  - Energy and Buildings
T1  - Groundwater heat pump selection for high temperature heating retrofit
EP  - 299
SP  - 294
VL  - 49
DO  - 10.1016/j.enbuild.2012.02.028
ER  - 

@article{
author = "Antonijević, Dragi and Manić, Dimitrije and Komatina, Mirko and Rudonja, Nedžad",
year = "2012",
abstract = "Retrofitting of fossil fuel powered hot water radiator heating systems of the existing buildings by groundwater heat pumps can provide significant energy savings followed by economic and environmental benefits. The paper describes the procedure for selection of optimal low-temperature groundwater heat pump vapor compression cycle based on thermodynamic analysis of applied high temperature heat pump heating system. In comparative energy and exergy analysis observed are six different heating cycles, five of which utilize two-stage refrigerant compression, and one operate as basic one-stage heat pump system with an auxiliary heater. The systems validation is performed accounting strongly for the boundary conditions of the selected location.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Energy and Buildings",
title = "Groundwater heat pump selection for high temperature heating retrofit",
pages = "299-294",
volume = "49",
doi = "10.1016/j.enbuild.2012.02.028"
}

Antonijević, D., Manić, D., Komatina, M.,& Rudonja, N.. (2012). Groundwater heat pump selection for high temperature heating retrofit. in Energy and Buildings
Elsevier Science Sa, Lausanne., 49, 294-299.
https://doi.org/10.1016/j.enbuild.2012.02.028

Antonijević D, Manić D, Komatina M, Rudonja N. Groundwater heat pump selection for high temperature heating retrofit. in Energy and Buildings. 2012;49:294-299.
doi:10.1016/j.enbuild.2012.02.028 .

Antonijević, Dragi, Manić, Dimitrije, Komatina, Mirko, Rudonja, Nedžad, "Groundwater heat pump selection for high temperature heating retrofit" in Energy and Buildings, 49 (2012):294-299,
https://doi.org/10.1016/j.enbuild.2012.02.028 . .

TY  - JOUR
AU  - Erić, Aleksandar
AU  - Dakić, Dragoljub
AU  - Nemoda, Stevan
AU  - Komatina, Mirko
AU  - Repić, Branislav
PY  - 2012
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1494
AB  - The paper presents the results of an experimental investigation conducted to determine the permeability coefficients and the stagnant thermal conductivity i.e. the thermo physical properties deemed to be the most important features of the bed material when considering combustion in pusher-type furnaces (i.e. combustion of biomass bales in cigar burners). The appropriate experimental methods have been developed and suitable experimental apparatus designed and constructed in order to determine permeability and stagnant thermal conductivity coefficient of the soybean straw bales. The experimental investigation conducted was aimed at examining the effects of relevant biomass bale parameters on the aforementioned coefficients. Based on the numerous measurements performed, correlations were obtained that are deemed highly important for optimization of the biomass bale combustion, as well as for modeling the transport phenomena occurring in the porous bed formed during biomass bales combustion in cigar burners. Data collected during the course of research investigation were used to develop a detailed CFD model of straw bales combustion in cigar burners.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Energy
T1  - Experimental determination thermo physical characteristics of balled biomass
EP  - 357
IS  - 1
SP  - 350
VL  - 45
DO  - 10.1016/j.energy.2012.02.063
ER  - 

@article{
author = "Erić, Aleksandar and Dakić, Dragoljub and Nemoda, Stevan and Komatina, Mirko and Repić, Branislav",
year = "2012",
abstract = "The paper presents the results of an experimental investigation conducted to determine the permeability coefficients and the stagnant thermal conductivity i.e. the thermo physical properties deemed to be the most important features of the bed material when considering combustion in pusher-type furnaces (i.e. combustion of biomass bales in cigar burners). The appropriate experimental methods have been developed and suitable experimental apparatus designed and constructed in order to determine permeability and stagnant thermal conductivity coefficient of the soybean straw bales. The experimental investigation conducted was aimed at examining the effects of relevant biomass bale parameters on the aforementioned coefficients. Based on the numerous measurements performed, correlations were obtained that are deemed highly important for optimization of the biomass bale combustion, as well as for modeling the transport phenomena occurring in the porous bed formed during biomass bales combustion in cigar burners. Data collected during the course of research investigation were used to develop a detailed CFD model of straw bales combustion in cigar burners.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Energy",
title = "Experimental determination thermo physical characteristics of balled biomass",
pages = "357-350",
number = "1",
volume = "45",
doi = "10.1016/j.energy.2012.02.063"
}

Erić, A., Dakić, D., Nemoda, S., Komatina, M.,& Repić, B.. (2012). Experimental determination thermo physical characteristics of balled biomass. in Energy
Pergamon-Elsevier Science Ltd, Oxford., 45(1), 350-357.
https://doi.org/10.1016/j.energy.2012.02.063

Erić A, Dakić D, Nemoda S, Komatina M, Repić B. Experimental determination thermo physical characteristics of balled biomass. in Energy. 2012;45(1):350-357.
doi:10.1016/j.energy.2012.02.063 .

Erić, Aleksandar, Dakić, Dragoljub, Nemoda, Stevan, Komatina, Mirko, Repić, Branislav, "Experimental determination thermo physical characteristics of balled biomass" in Energy, 45, no. 1 (2012):350-357,
https://doi.org/10.1016/j.energy.2012.02.063 . .

TY  - JOUR
AU  - Jovanović, Vladimir
AU  - Komatina, Mirko
PY  - 2012
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1383
AB  - Emission factors are widely accepted tool for estimation of various pollutants emissions in USA and EU. Validity of emission factors is strongly related to experimental data on which they are based. This paper is a result of an effort to establish reliable NOx and SO2 emission factors for Serbian coals. The results of NOx and SO2 emissions estimations based on USA and EU emission factors from thermal power plants Nikola Tesla Obrenovac A and B utilizing the Serbian lignite Kolubara are compared with experimental data obtained during almost one decade (2000-2008) of emissions measurements. Experimental data are provided from regular annual emissions measurement along with operational parameters of the boiler and coal (lignite Kolubara) ultimate and proximate analysis. Significant deviations of estimated from experimental data were observed for NOx, while the results for SO2 were satisfactory. Afterwards, the estimated and experimental data were plotted and linear regression between them established. Single parameter optimization was performed targeting the ideal slope of the regression line. Results of this optimization provided original NOx and SO2 emission factors for Kolubara lignite.
PB  - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
T2  - Thermal Science
T1  - Nox and SO2 emission factors for Serbian lignite Kolubara
EP  - 1228
IS  - 4
SP  - 1213
VL  - 16
DO  - 10.2298/TSCI120319055J
ER  - 

@article{
author = "Jovanović, Vladimir and Komatina, Mirko",
year = "2012",
abstract = "Emission factors are widely accepted tool for estimation of various pollutants emissions in USA and EU. Validity of emission factors is strongly related to experimental data on which they are based. This paper is a result of an effort to establish reliable NOx and SO2 emission factors for Serbian coals. The results of NOx and SO2 emissions estimations based on USA and EU emission factors from thermal power plants Nikola Tesla Obrenovac A and B utilizing the Serbian lignite Kolubara are compared with experimental data obtained during almost one decade (2000-2008) of emissions measurements. Experimental data are provided from regular annual emissions measurement along with operational parameters of the boiler and coal (lignite Kolubara) ultimate and proximate analysis. Significant deviations of estimated from experimental data were observed for NOx, while the results for SO2 were satisfactory. Afterwards, the estimated and experimental data were plotted and linear regression between them established. Single parameter optimization was performed targeting the ideal slope of the regression line. Results of this optimization provided original NOx and SO2 emission factors for Kolubara lignite.",
publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd",
journal = "Thermal Science",
title = "Nox and SO2 emission factors for Serbian lignite Kolubara",
pages = "1228-1213",
number = "4",
volume = "16",
doi = "10.2298/TSCI120319055J"
}

Jovanović, V.,& Komatina, M.. (2012). Nox and SO2 emission factors for Serbian lignite Kolubara. in Thermal Science
Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 16(4), 1213-1228.
https://doi.org/10.2298/TSCI120319055J

Jovanović V, Komatina M. Nox and SO2 emission factors for Serbian lignite Kolubara. in Thermal Science. 2012;16(4):1213-1228.
doi:10.2298/TSCI120319055J .

Jovanović, Vladimir, Komatina, Mirko, "Nox and SO2 emission factors for Serbian lignite Kolubara" in Thermal Science, 16, no. 4 (2012):1213-1228,
https://doi.org/10.2298/TSCI120319055J . .

TY  - JOUR
AU  - Erić, Aleksandar
AU  - Dakić, Dragoljub
AU  - Nemoda, Stevan
AU  - Komatina, Mirko
AU  - Repić, Branislav
PY  - 2011
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1231
AB  - The paper presents results of experimental investigation conducted to determine permeability coefficient of a porous bed formed by biomass bales, whereby the said coefficient represents one of the most important parameters of the bed material specified when considering its combustion in the pusher-type furnaces (i.e. combustion of biomass bales in cigar burners). Correlations obtained are deemed very important for optimization of biomass bale combustion, as well as for modeling transport phenomena occurring in the porous bed formed by biomass bales during their combustion in cigar burners. In order to determine permeability coefficient of air flow through soy straw bales, appropriate experimental method was developed and suitable experimental apparatus designed and constructed. The relevant coefficients were determined in such manner as to be representative of the viscous and inertial terms of the Forchheimer equation. Experimental investigation conducted examined the effects of relevant biomass bale parameters i.e. porosity and the moisture content on the abovementioned Forchheimer coefficients. Measurements conducted, as well as analysis of the results obtained, defined functional dependencies of the permeability coefficients on the porosity (which was varied in the range 0.62-0.78, for moisture content of 0.0948) and the sample's moisture content (which was varied in the range 0.0948-0.6394, for the selected value of porosity of 0.68) to be established. The correlations obtained are deemed suitable to be used in a broad spectrum of operating conditions that usually occur during real operation. Results obtained indicate that reduction in biomass bed porosity results in reduced permeability, with Forchheimer coefficients exhibiting a hyperbolic dependence on the bed porosity. Since it has been observed that increased moisture content of the sample (porosity value of 0.68) caused a decrease in permeability, a functional dependence of the sample moisture content on the porosity has been established. The dependence established is valid for the range of the sample moisture content between 0.0948 and 0.6394. Permeability coefficients, as well as their dependencies on the relevant factors (porosity and moisture content), represent basic data used in mathematical modeling of biomass bale combustion in cigar burners. In addition, the ones may also be very important when considering modifications of furnaces utilizing the combustion principle mentioned.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - International Journal of Heat and Mass Transfer
T1  - Experimental method for determining Forchheimer equation coefficients related to flow of air through the bales of soy straw
EP  - 4306
IS  - 19-20
SP  - 4300
VL  - 54
DO  - 10.1016/j.ijheatmasstransfer.2011.05.015
ER  - 

@article{
author = "Erić, Aleksandar and Dakić, Dragoljub and Nemoda, Stevan and Komatina, Mirko and Repić, Branislav",
year = "2011",
abstract = "The paper presents results of experimental investigation conducted to determine permeability coefficient of a porous bed formed by biomass bales, whereby the said coefficient represents one of the most important parameters of the bed material specified when considering its combustion in the pusher-type furnaces (i.e. combustion of biomass bales in cigar burners). Correlations obtained are deemed very important for optimization of biomass bale combustion, as well as for modeling transport phenomena occurring in the porous bed formed by biomass bales during their combustion in cigar burners. In order to determine permeability coefficient of air flow through soy straw bales, appropriate experimental method was developed and suitable experimental apparatus designed and constructed. The relevant coefficients were determined in such manner as to be representative of the viscous and inertial terms of the Forchheimer equation. Experimental investigation conducted examined the effects of relevant biomass bale parameters i.e. porosity and the moisture content on the abovementioned Forchheimer coefficients. Measurements conducted, as well as analysis of the results obtained, defined functional dependencies of the permeability coefficients on the porosity (which was varied in the range 0.62-0.78, for moisture content of 0.0948) and the sample's moisture content (which was varied in the range 0.0948-0.6394, for the selected value of porosity of 0.68) to be established. The correlations obtained are deemed suitable to be used in a broad spectrum of operating conditions that usually occur during real operation. Results obtained indicate that reduction in biomass bed porosity results in reduced permeability, with Forchheimer coefficients exhibiting a hyperbolic dependence on the bed porosity. Since it has been observed that increased moisture content of the sample (porosity value of 0.68) caused a decrease in permeability, a functional dependence of the sample moisture content on the porosity has been established. The dependence established is valid for the range of the sample moisture content between 0.0948 and 0.6394. Permeability coefficients, as well as their dependencies on the relevant factors (porosity and moisture content), represent basic data used in mathematical modeling of biomass bale combustion in cigar burners. In addition, the ones may also be very important when considering modifications of furnaces utilizing the combustion principle mentioned.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "International Journal of Heat and Mass Transfer",
title = "Experimental method for determining Forchheimer equation coefficients related to flow of air through the bales of soy straw",
pages = "4306-4300",
number = "19-20",
volume = "54",
doi = "10.1016/j.ijheatmasstransfer.2011.05.015"
}

Erić, A., Dakić, D., Nemoda, S., Komatina, M.,& Repić, B.. (2011). Experimental method for determining Forchheimer equation coefficients related to flow of air through the bales of soy straw. in International Journal of Heat and Mass Transfer
Pergamon-Elsevier Science Ltd, Oxford., 54(19-20), 4300-4306.
https://doi.org/10.1016/j.ijheatmasstransfer.2011.05.015

Erić A, Dakić D, Nemoda S, Komatina M, Repić B. Experimental method for determining Forchheimer equation coefficients related to flow of air through the bales of soy straw. in International Journal of Heat and Mass Transfer. 2011;54(19-20):4300-4306.
doi:10.1016/j.ijheatmasstransfer.2011.05.015 .

Erić, Aleksandar, Dakić, Dragoljub, Nemoda, Stevan, Komatina, Mirko, Repić, Branislav, "Experimental method for determining Forchheimer equation coefficients related to flow of air through the bales of soy straw" in International Journal of Heat and Mass Transfer, 54, no. 19-20 (2011):4300-4306,
https://doi.org/10.1016/j.ijheatmasstransfer.2011.05.015 . .