基于SolTrace的线性菲涅尔式聚光器建模与仿真

利用几何光学原理推导了线性菲涅尔式聚光器在SolTrace软件中建模所需参数的计算公式，给出了建模方法。结果表明，对于反射镜列数为21列、宽度为0.38 m、长度为4 m，复合抛物面聚光器(CPC)最大接受半角为45°，接收器距反射镜所在平面5.3 m的线性菲涅式聚光器，随着太阳入射角的增大，集热管表面能流密度逐渐增大且分布更均匀；当太阳入射角大于40°后，能流密度和均匀度趋于稳定；CPC为渐开线+cusp reflector曲线比渐开线+抛物线的集热管表面能流密度更大且分布更均匀。该结果对线性菲涅尔式聚光器的推广应用具有指导意义。

Abstract

Calculation formulas of parameters which are needed for establishing a linear Fresnel concentrator model in SolTrace software were derived by geometrical optical principles, and a modeling method was given by the example. The results show that for the linear Fresnel reflector which is composed of reflectors with 21 rows, 0.38 m width, 4 m length, the compound parabolic concentrator (CPC) with 45° maximum acceptance angle and the vacuum tube with 5.3 m height, the energy flux density on the vacuum collector tube gradually increases and the uniformity becomes better with the increasing of the solar incident angle. When the solar incident angle is greater than 40°, the energy flux density and the uniformity tend to be stable. What’s more, the energy flux density on the vacuum collector tube is bigger and the uniformity is better for the CPC with involutes + cusp reflectors than the CPC with involutes + parabolas. The results have a directive function for the popularization and application of the linear Fresnel concentrator.

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马军, 王成龙, 夏养君. 基于SolTrace的线性菲涅尔式聚光器建模与仿真[J]. 应用光学, 2019, 40(4): 676. MA Jun, WANG Chenglong, XIA Yangjun. Modeling and simulation of linear Fresnel reflector system based on SolTrace[J]. Journal of Applied Optics, 2019, 40(4): 676.

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