Numerical study of parabolic-trough direct steam generation loop in recirculation mode: Characteristics, performance and general operation strategy

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	Numerical study of parabolic-trough direct steam generation loop in recirculation mode: Characteristics, performance and general operation strategy
	Sun, Jie; Liu, Qibin; Hong, Hui
刊名	ENERGY CONVERSION AND MANAGEMENT
	2015-05-15
卷号	96 页码:287-302
关键词	Solar energy Direct steam generation (DSG) Concentrating solar power (CSP) Parabolic-trough collector (PTC) Operation strategy
英文摘要	The characteristics, performance and general operation strategy of parabolic-trough direct steam generation (DSG) loop in recirculation mode have been numerically studied. The controllable separation steam quality (x(sep) = 0.2-0.8), which characterizes the two-phase flow, and the corrected direct normal irradiance (DNIcorr = 200-1000 W m(-2)), the major weather impact, were chosen as two independent parameters. The results show that for a given DNIcorr, the onset of evaporation is advanced with increasing x(sep). The convective heat loss is less or equal to the radiative part at the inlet, then surpasses and finally could reach up to 1.6 times of the radiative part at outlet. The energy efficiency decreases along the loop regardless of DNIcorr or x(sep) while the exergy efficiency varies diversely according to DNIcorr in the superheating stage. This diverse variation is due to the opposite trends of energy level and heat gain. When DNIcorr < 400 W m(-2), the stratified flow shows an apparently increasing probability to emerge over the loop with decreasing x(sep), where the thermal-stress risk may exist. To quantify the probability, a novel flow pattern indicator is proposed. In addition, a general DNIcorr - x(sep)-based operation strategy of DSG loop concerning both performance and safety is given, of which the merit is verified through a case study in typical summer and winter days in North China. (C) 2015 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]	HEAT-TRANSFER ANALYSIS ; SOLAR COLLECTORS ; POWER-PLANTS ; RECEIVER ; FLOW ; DSG ; SYSTEMS ; BEHAVIOR ; 2-PHASE ; EXERGY
收录类别	SCI
语种	英语
WOS记录号	WOS:000353729200027
公开日期	2015-12-22
内容类型	期刊论文
源URL	[http://ir.etp.ac.cn/handle/311046/98916]
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	Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Sun, Jie,Liu, Qibin,Hong, Hui. Numerical study of parabolic-trough direct steam generation loop in recirculation mode: Characteristics, performance and general operation strategy[J]. ENERGY CONVERSION AND MANAGEMENT,2015,96:287-302.
APA	Sun, Jie,Liu, Qibin,&Hong, Hui.(2015).Numerical study of parabolic-trough direct steam generation loop in recirculation mode: Characteristics, performance and general operation strategy.ENERGY CONVERSION AND MANAGEMENT,96,287-302.
MLA	Sun, Jie,et al."Numerical study of parabolic-trough direct steam generation loop in recirculation mode: Characteristics, performance and general operation strategy".ENERGY CONVERSION AND MANAGEMENT 96(2015):287-302.