Analysis on influence characteristics of key parameters of small-scale fixed-focus linear Fresnel lens concentrator

被引：0
作者：
Li H. [1 ]
Huang J. [1 ]
Wang H. [2 ,3 ]
Yan J. [4 ]
机构：
[1] School of Materials and Energy, Guangdong University of Technology, Guangzhou
[2] School of Mechanical and Vehicular Engineering, Beijing Institute of Technology, Beijing
[3] School of Mechanics and Automotive Engineering, Zhaoqing University, Zhaoqing
[4] School of Mechanical Engineering, Hunan University of Science and Technology, Xiangtan
来源：
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2022年 / 43卷 / 05期
关键词：
Cavity absorber; Fixed-focus; Fresnel; Optical properties; Slip regulation; Solar collectors;
D O I：
10.19912/j.0254-0096.tynxb.2020-1163
中图分类号：
学科分类号：
摘要：
A small-scale Fresnel fixed-focus linear concentrating system using arc-cavity absorber is proposed based on the concentrating characteristics of linear Fresnel lens and the principle of polar tracking. The influence of key parameters such as solar declination angle, solar time angle and internal surface absorptivity of absorber on the optical properties of the concentrating system is studied in detail by using Monte Carlo ray tracing method and the principle of mathematical statistics. The results indicate that the internal surface absorptivity of absorber has the most significant effect on the optical efficiency factor. When the absorptivity is 1.00, 0.85 and 0.75 respectively, the average optical efficiency factor of the system is 0.950, 0.865 and 0.799 respectively. When the sun declination angle is 0°, 8°, 16° and 23.45°, the average uniformity factors are 0.507, 0.519, 0.561 and 0.612, respectively. The system is highly effective on the reduction of the cosine loss as well as the impact of focal line offset on the end loss. © 2022, Solar Energy Periodical Office Co., Ltd. All right reserved.
引用
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页码：230 / 237
页数：7
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