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Thermodynamic and economic analyses of a coal and biomass indirect coupling power generation system

查看全文 作　　者：Buqing [1]YE;Rui [1]ZHANG;Jin [1]CAO;Bingquan [1]SHI;Xun [1]ZHOU;Dong [1]LIU 高影响力作者 机构地区：[1]MIIT Key Laboratory of Thermal Control of Electronic Equipment,and Advanced Combustion Laboratory,School of Energy and Power Engineering,Nanjing University of Science and Technology,Nanjing 210094,China高影响力机构 出　　处：《Frontiers in Energy》索引2020年第14卷第3期,共17页高影响力期刊 基　　金：This work was supported by the Fundamental Research Funds for the Central Universities(Grant No.30919012104);the National Key R&D Program of China(Grant No.2016YFB0600100). 摘　　要：The coal and biomass coupling power genera-tion technology is considered as a promising technology for energy conservation and emission reduction.In this paper,a novel coal and biomass indirect coupling system is proposed based on the technology of biomass gasification and co-combustion of coal and gasification gas.For the sake of comparison,a coal and biomass direct coupling system is also introduced based on the technology of co-combustion of coal and biomass.The process of the direct and the indirect coupling system is simulated.The thermodynamic and economic performances of two systems are analyzed and compared.The simulation indicates that the thermodynamic performance of the indirect coupling system is slightly worse,but the economic performance is better than that of the direct coupling system.When the blending ratio of biomass is 20%,the energy and exergy fficiencies of the indirect coupling system are 42.70%and 41.14%,the intemal rate of returm(IRR)and discounted payback period(DPP)of the system are 25.68%and 8.56 years.The price fluctuation of fuels and products has a great influence on the economic performance of the indirect coupling system.The environmental impact analysis indicates that the indirect coupling system can inhibit the propagation of NOx and reduce the environmental cost. 关 键 词：BIOMASS indirect coupling system process simulation thermodynamic analysis economic analysis
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