Design and experimental analysis of a cylindrical compound Fresnel solar concentrator

被引：38
作者：
Zheng, Hongfei [1 ,2 ]
Feng, Chaoqing [1 ,3 ]
Su, Yuehong [2 ]
Dai, Sing [1 ]
Ma, Xinglong [1 ]
机构：
[1] Beijing Inst Technol, Sch Mech Engn, Beijing 100081, Peoples R China
[2] Univ Nottingham, Inst Sustainable Energy Technol, Dept Architecture & Built Environm, Nottingham NG7 2RD, England
[3] Inner Mongolia Univ Technol, Coll Energy & Power Engn, Hohhot 010051, Peoples R China
来源：
SOLAR ENERGY | 2014年 / 107卷
基金：
中国国家自然科学基金;
关键词：
Solar concentrator; Compound Fresnel concentrator; Shaped-Fresnel lens; Cylindrical compound concentrator; DIFFERENT CAVITY RECEIVERS; THERMAL POWER-PLANTS; LENSES; COLLECTOR; TECHNOLOGY;
D O I：
10.1016/j.solener.2014.05.010
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
This study presents the design of a cylinder shaped solar concentrator which is comprised of an arched Fresnel lens and a Fresnel mirror and a secondary reflector. An evacuated-tube or a concentrating photovoltaic cell can be used as the receiver being placed at the focus of the concentrator. This cylindrical compound Fresnel solar concentrator may have the advantages of good weather resistance, low driving force during tracking, good appearance and easy modularization. The dimensions of the Fresnel lens and the Fresnel reflector are calculated on the basis of optical principle. An optical simulation tool is used to obtain the optical efficiency of the concentrator for different incidence angles and therefore determine the allowable tracking error. It has been found that about 90% of the incident sunlight can still be gathered by the absorber when the tracking error is within 1.5 degrees. Discussion is also made about the influence of the solar azimuth angle on the optical efficiency. A preliminary measurement of the optical efficiency of a prototype cylindrical concentrator is introduced. The experimental data generally agrees with the simulation result. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：26 / 37
页数：12
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