菲涅尔高倍聚光PV/T系统的均光优化与热特性研究

Uniform scattering optimization and heat transfer characteristics of Fresnel high concentrating PV/T system

为提高三结砷化镓太阳能电池芯片表面能流分布的均匀性,对菲涅尔高倍聚光PV/T系统采用正交试验法进行多因素均光优化,并根据极差分析结果进一步优化得到光斑均匀性89.11%、光学效率89.29%、接收角1.09°的菲涅尔高倍聚光系统。将计算所得能流密度加载至电池芯片表面,通过有限元分析法模拟了电池芯片的温度分布,并与原系统、菲涅尔单级聚光系统和理想均匀辐照度下电池芯片温度分布进行比较。研究结果表明优化后的能流分布更均匀;电池芯片表面的温差随着能流密度分布均匀性的增加而减小,优化的菲涅尔高倍聚光系统能有效降低电池芯片中心位置能流密度,提高能流和温度分布的均匀性。

The orthogonal experiment method was applied to optimized light of multiple factors to improve the surface energy flow distribution of triple junction GaAs cell chip. Fresnel high concentrating system with spot uniformity of 89.11% , optical efficiency of 89.29% , and 1.09° acceptance angle was obtained according to the result of the range analysis. The energy flow distribution calculated was loaded on the surface of cell chip, and the temperature distribution of the cell chip was simulated by the finite element method, and then compared with the original system, the Fresnel single concentrating system and ideal uniform irradiance cell chip temperature distribution. The results displayed that the optimized energy flow distribution was more uniform. The surface temperature difference of cell chip decreased with the increase of the energy flow distribution uniformity. The optimized Fresnel high concentrating system can effectively reduce energy flow density of the center position of cell chip and improve the uniformity of energy flow and temperature distribution.