Numerical investigation of processes in the lignite-fired furnace when simple gray gas and weighted sum of gray gases models are used
Нема приказа
Аутори
Crnomarković, Nenad Đ.Sijercic, Miroslav
Belošević, Srđan
Tucaković, Dragan R.
Živanović, Titoslav
Чланак у часопису
Метаподаци
Приказ свих података о документуАпстракт
Comparison of the numerical investigation results was carried out when the simple gray gas (SGG) and weighted sum of gray gases (WSGG) models are used to model the radiative properties of the gas phase inside the lignite fired furnaces. Comprehensive mathematical model of the tangentially fired furnace by pulverized lignite was made. Gas radiative properties were modeled by the SGG and WSGG models. Radiative heat transfer was modeled by the zonal model. Gas-phase variables and absorbed wall fluxes were compared on the basis of the relative differences that were determined for all control volumes and surface zones. Average relative differences of the gas-phase temperatures were about 1.0%. Average relative differences of the absorbed wall fluxes were from 2.0% to 5.0%. Absorbed wall fluxes determined by the SGG model were bigger than those determined by the WSGG model. Differences of the heat transfer rates of the absorbed radiation through the furnace walls were expressed in percents o...f heat transfer rates determined by the SGG model and were similar to the average relative differences of absorbed wall fluxes. Results justify application of the SGG model in comprehensive mathematical models of lignite-fired furnaces. (C) 2012 Elsevier Ltd. All rights reserved.
Кључне речи:
Lignite-fired furnace / Simple gray gas model / Weighted sum of gray gases model / Zonal modelИзвор:
International Journal of Heat and Mass Transfer, 2013, 56, 1-2, 197-205Финансирање / пројекти:
- Повећање енергетске и еколошке ефикасности процеса у ложишту за угљени прах и оптимизација излазне грејне површине енергетског парног котла применом сопствених софтверских алата (RS-MESTD-Technological Development (TD or TR)-33018)
DOI: 10.1016/j.ijheatmasstransfer.2012.09.024
ISSN: 0017-9310
WoS: 000312625200021
Scopus: 2-s2.0-84867834190
Колекције
Институција/група
VinčaTY - JOUR AU - Crnomarković, Nenad Đ. AU - Sijercic, Miroslav AU - Belošević, Srđan AU - Tucaković, Dragan R. AU - Živanović, Titoslav PY - 2013 UR - https://vinar.vin.bg.ac.rs/handle/123456789/4364 AB - Comparison of the numerical investigation results was carried out when the simple gray gas (SGG) and weighted sum of gray gases (WSGG) models are used to model the radiative properties of the gas phase inside the lignite fired furnaces. Comprehensive mathematical model of the tangentially fired furnace by pulverized lignite was made. Gas radiative properties were modeled by the SGG and WSGG models. Radiative heat transfer was modeled by the zonal model. Gas-phase variables and absorbed wall fluxes were compared on the basis of the relative differences that were determined for all control volumes and surface zones. Average relative differences of the gas-phase temperatures were about 1.0%. Average relative differences of the absorbed wall fluxes were from 2.0% to 5.0%. Absorbed wall fluxes determined by the SGG model were bigger than those determined by the WSGG model. Differences of the heat transfer rates of the absorbed radiation through the furnace walls were expressed in percents of heat transfer rates determined by the SGG model and were similar to the average relative differences of absorbed wall fluxes. Results justify application of the SGG model in comprehensive mathematical models of lignite-fired furnaces. (C) 2012 Elsevier Ltd. All rights reserved. T2 - International Journal of Heat and Mass Transfer T1 - Numerical investigation of processes in the lignite-fired furnace when simple gray gas and weighted sum of gray gases models are used VL - 56 IS - 1-2 SP - 197 EP - 205 DO - 10.1016/j.ijheatmasstransfer.2012.09.024 ER -
@article{ author = "Crnomarković, Nenad Đ. and Sijercic, Miroslav and Belošević, Srđan and Tucaković, Dragan R. and Živanović, Titoslav", year = "2013", abstract = "Comparison of the numerical investigation results was carried out when the simple gray gas (SGG) and weighted sum of gray gases (WSGG) models are used to model the radiative properties of the gas phase inside the lignite fired furnaces. Comprehensive mathematical model of the tangentially fired furnace by pulverized lignite was made. Gas radiative properties were modeled by the SGG and WSGG models. Radiative heat transfer was modeled by the zonal model. Gas-phase variables and absorbed wall fluxes were compared on the basis of the relative differences that were determined for all control volumes and surface zones. Average relative differences of the gas-phase temperatures were about 1.0%. Average relative differences of the absorbed wall fluxes were from 2.0% to 5.0%. Absorbed wall fluxes determined by the SGG model were bigger than those determined by the WSGG model. Differences of the heat transfer rates of the absorbed radiation through the furnace walls were expressed in percents of heat transfer rates determined by the SGG model and were similar to the average relative differences of absorbed wall fluxes. Results justify application of the SGG model in comprehensive mathematical models of lignite-fired furnaces. (C) 2012 Elsevier Ltd. All rights reserved.", journal = "International Journal of Heat and Mass Transfer", title = "Numerical investigation of processes in the lignite-fired furnace when simple gray gas and weighted sum of gray gases models are used", volume = "56", number = "1-2", pages = "197-205", doi = "10.1016/j.ijheatmasstransfer.2012.09.024" }
Crnomarković, N. Đ., Sijercic, M., Belošević, S., Tucaković, D. R.,& Živanović, T.. (2013). Numerical investigation of processes in the lignite-fired furnace when simple gray gas and weighted sum of gray gases models are used. in International Journal of Heat and Mass Transfer, 56(1-2), 197-205. https://doi.org/10.1016/j.ijheatmasstransfer.2012.09.024
Crnomarković NĐ, Sijercic M, Belošević S, Tucaković DR, Živanović T. Numerical investigation of processes in the lignite-fired furnace when simple gray gas and weighted sum of gray gases models are used. in International Journal of Heat and Mass Transfer. 2013;56(1-2):197-205. doi:10.1016/j.ijheatmasstransfer.2012.09.024 .
Crnomarković, Nenad Đ., Sijercic, Miroslav, Belošević, Srđan, Tucaković, Dragan R., Živanović, Titoslav, "Numerical investigation of processes in the lignite-fired furnace when simple gray gas and weighted sum of gray gases models are used" in International Journal of Heat and Mass Transfer, 56, no. 1-2 (2013):197-205, https://doi.org/10.1016/j.ijheatmasstransfer.2012.09.024 . .