实现均匀照度光伏聚光镜设计  

Design of Uniform-Irradiance Concentrator for Concentration Photovoltaics System

作　　者：荆雷[1] 王尧[1] 赵会富[1,2] 许文斌[1] 刘华[1] 卢振武[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所光电技术研发中心,吉林长春130033 [2]长春理工大学光电工程学院,吉林长春130022

出　　处：《光学学报》2014年第2期72-77,共6页Acta Optica Sinica

基　　金：国家973计划(2010CB227101);中国科学院三期创新项目;吉林省科技发展计划项目(20130206018GX)

摘　　要：为满足聚光光伏系统的聚光需求,解决传统点聚焦式聚光光伏系统中聚焦光斑不均匀、径长比过大和聚光比较小的缺点,在不增加二次匀光器件的前提下,设计了径长比小、聚焦光斑相对均匀、聚光比高的聚光光伏系统。根据几何光学柯勒照明原理、等光程原理和反射定律,通过数值求解等光程方程组获得聚光镜各个面型的轮廓曲线。利用TracePro软件对所设计的聚光系统进行光线追迹模拟,结果表明:在聚光比为725的情况下,聚焦光斑最大照度仅为太阳照度的2300倍,是点聚焦情况下的1/10左右,系统的径长比为0.3,接收角为0.72°。系统设计实现了结构紧凑,聚光性能高的设计目标,为高倍聚光光伏系统的小型化,简单化提供了一种有效的解决途径。In order to meet the concentrative requirements of concentration photovoltaics system （CPVs） and resolve the traditional point focus concentrator＇s problems, including non-uniform irradiance, large aspect ratio and low concentration, a novel concentrator with small aspect ratio, uniform irradiance and high concentration is presented in this paper based on the precondition that no additional secondary optical element is increased. According to the theories of Kohler illuminating, constant optical path length, and Snell＇s law in geometric optics, we obtain the profiles of concentrator＇s surface through numerical solution of the constant optical path length equations. Using the optical software TracePro, we trace and simulate the CPVs. The results show that the maximum irradiance value of focal spots on the surface of solar cell is only 2300 times of the sun for the 725 concentration ratio, which is about 1/10 of the case of point focus concentrator. The aspect ratio of system is 0.3, and the acceptant angle is 0.72~. The design realizes the objectives of compact structure and high concentrative performances, which provides an effective way for realizing the high concentration CPVs＇ miniaturization and simplification.

关 键 词：几何光学 非成像光学 聚光光伏系统 柯勒照明 均匀性 

分 类 号：O435[机械工程—光学工程]