Compound parabolic collector for linear Fresnel reflector system

Jun MA; Cheng-long WANG; Yang-jun XIA

doi:10.3788/OPE.20192712.2542

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Compound parabolic collector for linear Fresnel reflector system

Modern Applied Optics | 更新时间：2020-07-09

- Compound parabolic collector for linear Fresnel reflector system
- Optics and Precision Engineering Vol. 27, Issue 12, Pages: 2542-2548(2019)
- 作者机构：
  
  1.兰州交通大学国家绿色镀膜技术与装备工程技术研究中心，甘肃兰州 730070
  2.兰州交通大学聚光太阳热能产业关键技术与装备省部共建协同创新中心，甘肃兰州 730070
  3.兰州交通大学光电技术与智能控制教育部重点实验室，甘肃兰州 730070
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20192712.2542
  CLC： TK519
- Received：02 August 2019，
  
  Accepted：06 September 2019，
  
  Published：25 December 2019
- 稿件说明：
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Jun MA, Cheng-long WANG, Yang-jun XIA. Compound parabolic collector for linear Fresnel reflector system[J]. Optics and precision engineering, 2019, 27(12): 2542-2548.
DOI：

Jun MA, Cheng-long WANG, Yang-jun XIA. Compound parabolic collector for linear Fresnel reflector system[J]. Optics and precision engineering, 2019, 27(12): 2542-2548. DOI： 10.3788/OPE.20192712.2542.

摘要

为了分析复合抛物面聚光器(Compound Parabolic Collector，CPC)的几何光学效率及影响因素，为线性菲涅尔式聚光系统的优化设计和实际应用提供理论依据。根据用于线性菲涅尔式聚光系统的CPC特点，在Matlab软件中建立模型并进行光线跟踪计算其几何光学效率。利用TracePro软件对几何光学效率模型进行验证。最后，采用该模型分析吸热管外径公差、吸热管位置偏移和线型误差对CPC几何光学效率的影响。结果表明：间隙为32.5 mm、接收半角为55°、截取比为0.3的CPC配合外径为70 mm的吸热管，当吸热管外径公差小于-0.4 mm、水平方向存在偏移、垂直方向存在正偏移或线型轮廓增大等因素时，其平均几何光学效率迅速减小。实际应用中应尽可能避免以上因素，或者设计时减小CPC入射角的范围，从而降低对CPC平均几何光学效率的影响。

Abstract

To analyze the efficiency of geometrical optics and its influencing factors on a Compound Parabolic Collector (CPC)

a theoretical basis was provided for the optimization design and practical application of a linear Fresnel reflector system. According to the CPC characteristics of a linear Fresnel reflector system

a model was built using Matlab software; the geometrical optics efficiency was simulated by a ray-tracing method. The geometrical optics efficiency model was validated by TracePro software. The model was used to analyze the influence of outer diameter tolerance

position deviation of the absorber tube

and the profile error on the geometrical optics efficiency of the CPC. Results show that the mean geometrical optics efficiency of CPC with a gap of 32.5 mm

half-acceptance angle of 55°

truncation ratio of 0.3

and an absorber tube outer diameter of 70 mm

can be reduced rapidly when the outer diameter tolerance of the absorber tube is less than -0.4 mm

there is a horizontal offset

a positive vertical offset

or an increase in the profile of the CPC. In practical applications

the above factors should be avoided as much as possible or the range of the incidence angle of the CPC should be reduced in design to reduce the influence on its mean geometrical optics efficiency.

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