Exergy evaluation of a typical 330 MW solar-hybrid coal-fired power plant in China

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	Exergy evaluation of a typical 330 MW solar-hybrid coal-fired power plant in China
	Peng, Shuo 1,2; Wang, Zhaoguo 1,2; Hong, Hui 1; Xu, Da 1,2; Jin, Hongguang 1
刊名	ENERGY CONVERSION AND MANAGEMENT
	2014-09-01
卷号	85 页码:848-855
关键词	Solar-hybrid coal-fired power plant Off-design Exergy destruction Exergy efficiency
英文摘要	This study discusses the thermodynamic performance of a solar-hybrid coal-fired power plant that uses solar heat with temperature lower than 300 degrees C to replace the extracted steam from a steam turbine to heat the feed water. Through this process, the steam that was to be extracted can efficiently expand in the steam turbine to generate electricity. The flow rate of steam returning to the turbine retains only a small part of the main stream, allowing the steam turbine to run close to design conditions for all DNI. A solar-only thermal power plant without storage is also discussed to illustrate the advantages of a solar-hybrid coal-fired power plant. The off-design performances of both plants are compared based on the energy-utilization diagram method. The exergy destruction of the solar-hybrid coal-fired power plant is found to be lower than that of the solar-only thermal power plant. The comparison of two plants, which may provide detailed information on internal phenomena, highlights several advantages of the solar-hybrid coal-fired power plant in terms of off-design operation: lower exergy destruction in the solar feed water heater and steam turbine and higher exergy and solar-to-electricity efficiency. Preliminary technological economic performances of both plants are compared. The results obtained in this study indicate that a solar-hybrid coal-fired power plant could achieve better off-design performance and economic performance than a solar-only thermal power plant. (C) 2014 Elsevier Ltd. All rights reserved.
WOS标题词	Science & Technology ; Physical Sciences ; Technology
类目[WOS]	Thermodynamics ; Energy & Fuels ; Mechanics ; Physics, Nuclear
研究领域[WOS]	Thermodynamics ; Energy & Fuels ; Mechanics ; Physics
关键词[WOS]	INTEGRATION ; SYSTEM ; PERFORMANCE ; CYCLE ; HEAT
收录类别	SCI
语种	英语
WOS记录号	WOS:000340213800092
公开日期	2015-12-22
内容类型	期刊论文
源URL	[http://ir.etp.ac.cn/handle/311046/106032]
专题	工程热物理研究所_中国科学院工程热物理所（论文库）_期刊论文（SCI）
作者单位	1.Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Peng, Shuo,Wang, Zhaoguo,Hong, Hui,et al. Exergy evaluation of a typical 330 MW solar-hybrid coal-fired power plant in China[J]. ENERGY CONVERSION AND MANAGEMENT,2014,85:848-855.
APA	Peng, Shuo,Wang, Zhaoguo,Hong, Hui,Xu, Da,&Jin, Hongguang.(2014).Exergy evaluation of a typical 330 MW solar-hybrid coal-fired power plant in China.ENERGY CONVERSION AND MANAGEMENT,85,848-855.
MLA	Peng, Shuo,et al."Exergy evaluation of a typical 330 MW solar-hybrid coal-fired power plant in China".ENERGY CONVERSION AND MANAGEMENT 85(2014):848-855.