菲涅尔聚光PV/T系统输出特性分析及优化

Structure Optimization and Analysis of Output Characteristics of Fresnel Concentrating Photovoltaic/Thermal System

针对菲涅尔聚光引起的砷化镓电池温度分布不均问题,本文提出水冷螺旋式微通道散热结构,冷却GaAs电池,研究微通道长度、PCB板面积和流体入口速度对电池温度、出口流体温度及太阳能电池的光热、光电及综合效率的影响,并进行结构优化,结果表明,对于本文所研究单片砷化镓电池,选择面积为127×127 mm^2的PCB板,流道长度为6圈时的螺旋式微通道冷却结构换热效果最佳,且若得到可应用于膜蒸馏苦咸水淡化系统热源的65~70℃出口流体,入口流体速度应控制在0.52~0.58 m/s内,本文为菲涅尔高倍聚光PV/T冷却系统的换热特性试验研究与应用提供了理论基础。

Concerning the problem of non-uniform temperature of GaAs solar cell module in a new Fresnel three-stage high-concentration Photovoltaic/Thermal system,Helix microchannels cooling structure be designed using for cooling GaAs solar cell.And on this basis influencing factors of battery temperature,outlet fluid temperature,thermal efficiency and comprehensive efficiency can be investigated including the length of the microchannel,PCB area and fluid inlet velocity,meanwhile the structure be optimized,and the results show that for the monolithic GaAs cell the heat transfer effect is best for PCB board area of 127×127,and he helix microchannels cooling structure with flow channels length of 6 lap in this article,and if it can be used in membrane distillation desalination of brackish water system of heat of 65 ~ 70℃ outlet fluid,the inlet fluid velocity should be controlled within 0.52 ~ 0.58 m/s.The study can provide theoretical bases for heat transfer characteristics experimental study of the cooling system and the application in Fresnel high concentrated PV/T.