Numerical investigation of processes in the lignite-fired furnace when simple gray gas and weighted sum of gray gases models are used
Само за регистроване кориснике
2013
Аутори
Crnomarković, NenadSijerčić, Miroslav
Belošević, Srđan V.
Tucaković, Dragan
Živanović, Titoslav
Чланак у часопису (Објављена верзија)
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.
Кључне речи:
Zonal model / Weighted sum of gray gases model / Simple gray gas model / Lignite-fired furnaceИзвор:
International Journal of Heat and Mass Transfer, 2013, 56, 1-2, 197-205Издавач:
- Pergamon-Elsevier Science Ltd, Oxford
Финансирање / пројекти:
DOI: 10.1016/j.ijheatmasstransfer.2012.09.024
ISSN: 0017-9310
WoS: 000312625200021
Scopus: 2-s2.0-84867834190
Институција/група
Inovacioni centarTY - JOUR AU - Crnomarković, Nenad AU - Sijerčić, Miroslav AU - Belošević, Srđan V. AU - Tucaković, Dragan AU - Živanović, Titoslav PY - 2013 UR - https://machinery.mas.bg.ac.rs/handle/123456789/1651 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. PB - Pergamon-Elsevier Science Ltd, Oxford 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 EP - 205 IS - 1-2 SP - 197 VL - 56 DO - 10.1016/j.ijheatmasstransfer.2012.09.024 ER -
@article{ author = "Crnomarković, Nenad and Sijerčić, Miroslav and Belošević, Srđan V. and Tucaković, Dragan 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.", publisher = "Pergamon-Elsevier Science Ltd, Oxford", 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", pages = "205-197", number = "1-2", volume = "56", doi = "10.1016/j.ijheatmasstransfer.2012.09.024" }
Crnomarković, N., Sijerčić, M., Belošević, S. V., Tucaković, D.,& 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 Pergamon-Elsevier Science Ltd, Oxford., 56(1-2), 197-205. https://doi.org/10.1016/j.ijheatmasstransfer.2012.09.024
Crnomarković N, Sijerčić M, Belošević SV, Tucaković D, 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, Sijerčić, Miroslav, Belošević, Srđan V., Tucaković, Dragan, 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 . .