Analysis of low temperature solar thermal electric generation using regenerative Organic Rankine Cycle

被引：131

作者：

Gang, Pei ^{[1
]}

Jing, Li ^{[1
]}

Jie, Ji ^{[1
]}

机构：

[1] Univ Sci & Technol China, Dept Thermal Sci & Energy Engn, Hefei 230026, Anhui, Peoples R China

来源：

APPLIED THERMAL ENGINEERING | 2010年 / 30卷 / 8-9期

基金：

美国国家科学基金会; 国家高技术研究发展计划(863计划);

关键词：

Solar thermal electric generation; Regenerative cycle; ORC; CPC; ENERGY; POWER;

D O I：

10.1016/j.applthermaleng.2010.01.011

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The innovative configuration of low temperature solar thermal electric generation with regenerative Organic Rankine Cycle (ORC) is designed, mainly consisting of small concentration ratio compound parabolic concentrators (CPC) and the regenerative ORC. Advantages of the innovative configuration such as effectively reducing heat transfer irreversibility and permitting the use of thermal storage with phase change materials (PCMs) are outlined. The numerical simulation of the heat transfer and power conversion processes are carried out based on distributed parameters. The effects of regenerative cycle on the collector, ORC, and overall electricity efficiency are then analyzed. The results indicate that the regenerative cycle has positive effects on the ORC efficiency but negative ones on the collector efficiency due to increment of the average working temperature of the first-stage collectors. Thus, it is necessary to evaluate the overall electricity efficiency when regenerative cycle is adopted. Further investigation shows that there are maximum efficiencies for both the ORC and the system electric generation on conditions of constant irradiance, evaporation temperature, and environment temperature. And the regenerative temperature at which the system electricity efficiency reaches its maximum is smaller than that at which the ORC efficiency reaches its maximum by 12-21 degrees C. Thus, the regenerative cycle optimization of the solar thermal electric generation differs from that of a solo ORC. The system electricity efficiency with regenerative ORC is about 8.6% for irradiance 750 W/m(2) and is relatively higher than that without the regenerative cycle by 4.9%. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：998 / 1004

页数：7

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