组合式免跟踪聚光光学系统设计（英文）

Design of combined non-tracking concentrated optical system

针对当前聚光光伏系统中自动跟踪系统故障率高及跟踪成本大等问题,提出了一种由线聚焦菲涅耳透镜、反射式二次聚光器和全反射棱锥组成的组合式免跟踪聚光光学系统,论述了各组成元件的工作原理与设计方法。在光学设计软件Zemax里对该系统进行结构优化与仿真分析,结果表明,在俯仰角最大为16°时,该系统的平均聚光效率为24.1%,与FRS系统相比提高了18.7%。集成了基于组合式免跟踪聚光光学系统的免跟踪聚光光伏模组,初步测试结果表明,该模组在非跟踪状态下光电转换效率最高达到19.6%,4 h后光电转换效率仍能达到5.9%。

A combined non-tracking concentrated optical(CNTCO)system composed of line Fresnel lens(LFL),reflection-type secondary optical element(R-SOE)and total internal reflection prism(TIRP)was proposed due to the high failure rate and high cost of the automatic solar tracking system.Moreover,the principle and design method of each component were discussed.The structure of the system was optimized and simulated in optical design software Zemax.The results show that the average concentration efficiency of the system reaches up to 24.1%,an 18.7%increasement compared with a combined system consisted of LFL and R-SOE(FRS),on the condition that the pitch angle is up to 16°.The non-tracking concentrated photovoltaic module based on CNTCO system was integrated and preliminarily tested.The test results indicate that the photoelectric transformation efficiency of the module could be optimized up to 19.6%on non-tracking condition,even still up to 5.9%after 4 hours.