Analysis of thermodynamic performance of cavity absorber in the parabolic trough solar concentrator

被引：0

作者：

Liu, Qingjun ^{[1
]}

Liu, Deyou ^{[1
]}

Zhu, Tianyu ^{[2
]}

Mao, Yufei ^{[1
]}

Wang, Lei ^{[1
]}

机构：

[1] Hohai University, Nanjing, 210098, Jiangsu Province

[2] Nantong Ocean and Coastal Engineering Research Institute, Hohai University, Nantong, 226300, Jiangsu Province

来源：

Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2015年 / 35卷 / 01期

关键词：

Cavity absorber; Heat collection efficiency; Parabolic trough solar thermal power; R123; Supercritical fluid; Two-dimensional steady-state heat transfer model;

D O I：

10.13334/j.0258-8013.pcsee.2015.01.016

中图分类号：

学科分类号：

摘要：

The paper presented the structure and focusing principle of cavity absorber in the parabolic trough solar concentrator that was suitable for low and medium temperature solar thermal electric generation with organic Rankine cycle(ORC). The optical characteristics were studied by TRACEPRO software, and it was approved that the absorber reliably accepted solar radiation. This paper first established a two-dimensional steady-state heat transfer model, and selected R123 as working fluid, then systematically analyzed the major influence factors, including the solar irradiation, working pressure, flow rate, wind speed, and thickness of insulating layer, on the supercritical heat transfer processes. The results show that increasing mass flow rate should be carried out to enhance the heat absorption and keep the absorber tube in the safe state under supercritical condition. Equipment cost rises with increasing the inlet pressure, and can't improve the performance. The suitable insulation thickness can effectively reduce heat loss and improve performance of the absorber. The research results offer a reference for designing and building cavity absorber experimental system. © 2015 Chin. Soc. for Elec. Eng..

引用

页码：126 / 132

页数：6

共 22 条

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