楔形棱镜聚光器的理论研究与仿真设计  

Theoretical study and simulation design of a wedge-shape prism concentrator

作　　者：黄文[1] 何开岩[1] 曾威[1] 钟水库[1] 孙备[1] 

机构地区：[1]广西大学物理科学与工程技术学院,广西南宁530004

出　　处：《广西大学学报（自然科学版）》2013年第6期1464-1470,共7页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(51166001)

摘　　要：针对传统静态楔形棱镜聚光器（S-WSPC）聚光比低和体积笨重等不足，设计了一种跟踪太阳的动态楔形棱镜聚光器（D—WSPC），通过边缘光线原理和蒙特卡罗光迹追迹方法分析了其几何聚光比和光学效率，并对优化参数（a=59-60／3=8-9，7=15）下的聚光器进行了模拟仿真。研究结果表明：新增的菲涅尔透镜（FL）减小了楔角和余弦损失，而等腰梯形结构和底面截断则大幅度减小了楔形棱镜的体积，提高了聚光器的几何聚光比；仿真结果显示光强分布均匀，容忍角宽，可应用于低倍聚光光伏（CPV）发电。A dynamic wedge-shape prism concentrator （D-WSPC） tracing the sun was designed to overcome the low concentrate ratio and unwieldy volume of the traditional static wedge-shape prism concentrator （S-WSPC）. Its geometric concentrate ratio and optical efficiency were analysed accord- ing to the edge-ray principle, and the concentrator under optimal parameters （c~= 59~ -60~ ,/3= 8~ ~ 9~ ,＇y = 15~） was simulated by Monte-Carlo rays tracing method. The result shows that the wedge angle and incident light＇s cosine loss were reduced by adding a Fresnel lens, and the concentrator＇s volume was reduced substantially by using isosceles trapezoid structure and bottom truncation. Therefore,the D-WSPC＇s geometric concentrate ratio was improved. The simulated result shows a uniform light intensity distribution and a wide tolerable angle of the D-WSPC, which are appropriate for low concentration photovoltaic （CPV） oower generation.

关 键 词：聚光器 楔形棱镜 菲涅尔透镜 光学效率 

分 类 号：TK519[动力工程及工程热物理—热能工程]