Performance evaluation of a direct vapor generation supercritical ORC system driven by linear Fresnel reflector solar concentrator

被引：60

作者：

Xu, Guoqiang ^{[1
]}

Song, Gu ^{[1
]}

Zhu, Xiaoxun ^{[1
]}

Gao, Wei ^{[1
]}

Li, Haiwang ^{[1
]}

Quan, Yongkai ^{[1
]}

机构：

[1] Beihang Univ, Natl Key Lab Sci & Technol Aeroengine Aerothermod, Sch Energy & Power Engn, Beijing 100191, Peoples R China

来源：

APPLIED THERMAL ENGINEERING | 2015年 / 80卷

关键词：

Supercritical organic Rankine cycle (SORC); Direct vapor generation (DVG); Linear Fresnel reflector (LFR); Compound parabolic concentrator (CPC); cavity receiver; Thermal efficiency; ORGANIC RANKINE-CYCLE; DIRECT STEAM-GENERATION; WORKING FLUIDS; PARABOLIC TROUGHS; CAVITY RECEIVER; OPTIMIZATION; COLLECTORS; HEAT; SIMULATION;

D O I：

10.1016/j.applthermaleng.2014.12.071

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

For the purpose of getting higher system efficiency at high temperature and avoiding the complex twophase problem, the performance of a direct vapor generation (DVG) supercritical organic Rankine cycle (SORC) system driven by linear Fresnel reflector (LFR) concentrator was evaluated in the paper. The detailed procedure for modeling the LFR concentrator and SORC process through the EES environment was presented. The method to select suitable supercritical organic working fluids for middle high temperature (150 C-350 C) was also indicated. The results showed that coupling the supercritical and DVG technology not only decreases the irreversibility at evaporator, it also reduces the heat loss and cost of system and allows obtaining higher overall efficiency. With the increasing of inlet temperature before turbine, the overall efficiency increases. In addition, the results demonstrated that supercritical cycle can be seen as a way to increase the maximum operating temperature. The results of the present work implied that cyclohexane is the best choice of organic working fluid for SORC system with an overall efficiency of 19.65%. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：196 / 204

页数：9

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