平板吸收体非对称复合抛物聚光器结构及特性研究

Research on Structure and Characteristics of Asymmetrical Compound Parabolic Concentrator with Plane Absorber

针对平板吸收体非对称复合抛物聚光器(PACPC)的结构及特性进行了研究。构建了平板吸收体复合抛物聚光器(CPC)面形结构模型,在其基础上进一步建立了PACPC结构方程,并获得解析解。采用光学设计软件TracePro对所构建的PACPC面形结构的光学特性进行了光学模拟,探究其光学特性,发现随着光线入射角的变化,吸收体表面接收到的辐射能分布不均匀。根据太阳能直散辐射理论,分别计算了PACPC在全年中的直散辐射量的采集,结果表明PACPC系统的年采光量较相同面积的平板吸收体系统得到了显著提高,平均年采光量提高了15.28%。

The structure and characteristics of asymmetrical compound parabolic concentrators with plane absorber （PACPC） is researched. The surface structure model of compound parabolic concentrators （CPC） with plane absorber is established, and the structural equation of PACPC is further established on the basis of CPC, and the analytic solution is obtained. The optics characteristic of the established PACPC surface structure model is simulated by the optical design software TracePro, and the optical characteristics are investigated. It is found that, with the change of incident angle of light, the radiant energy at the absorber surface is distributed unevenly. According to the solar direct and dispersion radiation theory, the acquisition of direct and scattered radiation in the course of the year is calculated by numerical calculation. The results show that the average annual lighting quantity obtained by the system of PACPC is obviously more than that of the plane absorber system with same area, and the increment is 15.28%.