Optimization of oxy-fuel circulating fluidized bed combustion system with high oxygen concentration

High oxygen concentration oxy-fuel circulating fluidized bed (CFB) combustion technology is a high efficiency and low cost oxy-fuel combustion technology, which also has high potential of optimization and efficiency improvement. In this research, energy efficiency is analysed to acquire the effects...

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Autores principales: Runjuan Kong, Wei Li, Haigang Wang, Qiangqiang Ren
Formato: article
Lenguaje:EN
Publicado: Elsevier 2022
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Acceso en línea:https://doaj.org/article/73b5d095bf1d45cd9f11147cbd3f7bb7
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spelling oai:doaj.org-article:73b5d095bf1d45cd9f11147cbd3f7bb72021-12-04T04:34:51ZOptimization of oxy-fuel circulating fluidized bed combustion system with high oxygen concentration2352-484710.1016/j.egyr.2021.11.042https://doaj.org/article/73b5d095bf1d45cd9f11147cbd3f7bb72022-05-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2352484721011860https://doaj.org/toc/2352-4847High oxygen concentration oxy-fuel circulating fluidized bed (CFB) combustion technology is a high efficiency and low cost oxy-fuel combustion technology, which also has high potential of optimization and efficiency improvement. In this research, energy efficiency is analysed to acquire the effects of flue gas recirculation mode, preheating temperature and oxygen purity on the net efficiency and energy consumption of the 50% oxy-fuel combustion system, so as to obtain the further optimization strategy. The following results are obtained by simulation. The optimal extraction position of recycled flue gas (RFG) is gas preheater outlet, and the net power generation efficiency increases by 0.23% to 25.08%. As the preheating temperature increases from 230 to 400 °C, the net efficiency increases by 1.19% to 26.04%. The net efficiency increases first then decreases as the oxygen purity at ASU outlet increase from 89% to 97.4%, and the optimal value is the 94%. Finally, the optimal system is obtained when RFG is extracted from gas preheater outlet, the preheating temperature is 400 °C and the oxygen purity at ASU outlet is 94%. The net efficiency of the optimization system reaches 27.4%, increasing by 2.55%.Runjuan KongWei LiHaigang WangQiangqiang RenElsevierarticleCirculating fluidized bedOxy-fuel combustionHigh oxygen concentrationProcess simulationSystem optimizationElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENEnergy Reports, Vol 8, Iss , Pp 83-90 (2022)
institution DOAJ
collection DOAJ
language EN
topic Circulating fluidized bed
Oxy-fuel combustion
High oxygen concentration
Process simulation
System optimization
Electrical engineering. Electronics. Nuclear engineering
TK1-9971
spellingShingle Circulating fluidized bed
Oxy-fuel combustion
High oxygen concentration
Process simulation
System optimization
Electrical engineering. Electronics. Nuclear engineering
TK1-9971
Runjuan Kong
Wei Li
Haigang Wang
Qiangqiang Ren
Optimization of oxy-fuel circulating fluidized bed combustion system with high oxygen concentration
description High oxygen concentration oxy-fuel circulating fluidized bed (CFB) combustion technology is a high efficiency and low cost oxy-fuel combustion technology, which also has high potential of optimization and efficiency improvement. In this research, energy efficiency is analysed to acquire the effects of flue gas recirculation mode, preheating temperature and oxygen purity on the net efficiency and energy consumption of the 50% oxy-fuel combustion system, so as to obtain the further optimization strategy. The following results are obtained by simulation. The optimal extraction position of recycled flue gas (RFG) is gas preheater outlet, and the net power generation efficiency increases by 0.23% to 25.08%. As the preheating temperature increases from 230 to 400 °C, the net efficiency increases by 1.19% to 26.04%. The net efficiency increases first then decreases as the oxygen purity at ASU outlet increase from 89% to 97.4%, and the optimal value is the 94%. Finally, the optimal system is obtained when RFG is extracted from gas preheater outlet, the preheating temperature is 400 °C and the oxygen purity at ASU outlet is 94%. The net efficiency of the optimization system reaches 27.4%, increasing by 2.55%.
format article
author Runjuan Kong
Wei Li
Haigang Wang
Qiangqiang Ren
author_facet Runjuan Kong
Wei Li
Haigang Wang
Qiangqiang Ren
author_sort Runjuan Kong
title Optimization of oxy-fuel circulating fluidized bed combustion system with high oxygen concentration
title_short Optimization of oxy-fuel circulating fluidized bed combustion system with high oxygen concentration
title_full Optimization of oxy-fuel circulating fluidized bed combustion system with high oxygen concentration
title_fullStr Optimization of oxy-fuel circulating fluidized bed combustion system with high oxygen concentration
title_full_unstemmed Optimization of oxy-fuel circulating fluidized bed combustion system with high oxygen concentration
title_sort optimization of oxy-fuel circulating fluidized bed combustion system with high oxygen concentration
publisher Elsevier
publishDate 2022
url https://doaj.org/article/73b5d095bf1d45cd9f11147cbd3f7bb7
work_keys_str_mv AT runjuankong optimizationofoxyfuelcirculatingfluidizedbedcombustionsystemwithhighoxygenconcentration
AT weili optimizationofoxyfuelcirculatingfluidizedbedcombustionsystemwithhighoxygenconcentration
AT haigangwang optimizationofoxyfuelcirculatingfluidizedbedcombustionsystemwithhighoxygenconcentration
AT qiangqiangren optimizationofoxyfuelcirculatingfluidizedbedcombustionsystemwithhighoxygenconcentration
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