Thermodynamics investigation of a solar power system integrated oil and molten salt as heat transfer fluids

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	Thermodynamics investigation of a solar power system integrated oil and molten salt as heat transfer fluids
	Liu, Qibin 1,2; Bai, Zhang 1,2; Sun, Jie 1; Yan, Yuejun 1,3; Gao, Zhichao 1; Jin, Hongguang 1,2
刊名	APPLIED THERMAL ENGINEERING
	2016-01-25
卷号	93 页码:967-977
关键词	Parabolic trough solar power system Dual-solar field Heat transfer fluid Thermodynamics investigation Off-design
英文摘要	In this paper, anew parabolic trough solar power system that incorporates a dual-solar field with oil and molten salt as heat transfer fluids (HTFs) is proposed to effectively utilize the solar energy. The oil is chosen as a HTF in the low temperature solar field to heat the feeding water, and the high temperature solar field uses molten salt to superheat the steam that the temperature is higher than 773 K. The produced superheated steam enters a steam turbine to generate power. Energy analysis and exergy analysis of the system are implemented to evaluate the feasibility of the proposed system. Under considerations of variations of solar irradiation, the on-design and off-design thermodynamic performances of the system and the characteristics are investigated. The annual average solar-to-electric efficiency and the nominal efficiency under the given condition for the proposed solar thermal power generation system reach to 15.86% and 22.80%, which are higher than the reference system with a single HTF. The exergy losses within the solar heat transfer process of the proposed system are reduced by 7.8% and 45.23% compared with the solar power thermal systems using oil and molten salt as HTFs, respectively. The integrated approach with oil and molten salt as HTFs can make full use of the different physical properties of the HTFs, and optimize the heat transfer process between the HTFs and the water/steam. The exergy loss in the water evaporation and superheated process are reduced, the system efficiency and the economic performance are improved. The research findings provide a new approach for the improvement of the performances of solar thermal power plants. (C) 2015 Elsevier Ltd. All rights reserved.
WOS标题词	Science & Technology ; Physical Sciences ; Technology
类目[WOS]	Thermodynamics ; Energy & Fuels ; Engineering, Mechanical ; Mechanics
研究领域[WOS]	Thermodynamics ; Energy & Fuels ; Engineering ; Mechanics
关键词[WOS]	SIMULATION ; PERFORMANCE ; TECHNOLOGY ; ENERGY ; PLANTS
收录类别	SCI
语种	英语
WOS记录号	WOS:000367776700101
公开日期	2016-03-15
内容类型	期刊论文
源URL	[http://ir.etp.ac.cn/handle/311046/112328]
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 100190, Peoples R China 3.Univ Penn, Dept Mech Engn & Appl Mech, Philadelphia, PA 19104 USA
推荐引用方式 GB/T 7714	Liu, Qibin,Bai, Zhang,Sun, Jie,et al. Thermodynamics investigation of a solar power system integrated oil and molten salt as heat transfer fluids[J]. APPLIED THERMAL ENGINEERING,2016,93:967-977.
APA	Liu, Qibin,Bai, Zhang,Sun, Jie,Yan, Yuejun,Gao, Zhichao,&Jin, Hongguang.(2016).Thermodynamics investigation of a solar power system integrated oil and molten salt as heat transfer fluids.APPLIED THERMAL ENGINEERING,93,967-977.
MLA	Liu, Qibin,et al."Thermodynamics investigation of a solar power system integrated oil and molten salt as heat transfer fluids".APPLIED THERMAL ENGINEERING 93(2016):967-977.