聚光光伏系统中浸没冷却液体的光学性能分析

OPTICAL PERFORMANCE ANALYSIS OF IMMERSION COOLING LIQUID IN CONCENTRATING PHOTOVOLTAIC SYSTEM

通过分光光度计采用双光程测试方法获得合成油、醇类、硅油、矿物油4大类液体中10种候选液的光谱透过率。与传统光伏封装材料相比,候选浸没冷却液体的光谱透过率略显优势。基于液浸聚光电池的归一化光电流密度分析得出10种候选液均可用于浸没冷却聚光硅电池,二甲基硅油引起的功率损失最小;除丙三醇外其余9种候选液均可用于浸没冷却聚光三结电池,Therminol VP-1引起的功率损失最小,其次为二甲基硅油。

In order to apply direct liquid immersion cooling to concentrating photovoltaic（CPV）systems with denselypacked cell assemblies,the selection of suitable immersion cooling liquids is critically important. That is as the opticalperformance of the immersion cooling liquids will affect the electrical characteristics of concentrating solar cells. Thespectral transmittances of 10 candidate liquids in the four major classes of synthetic oil,alcohol,silicone oil and mineraloil are obtained by the spectrophotometer using double optical path test method. Their transmittances are proved to beslightly better than those of conventional PV packaging materials. Based on the normalized photocurrent density analysisof liquid immersion concentrator cells,10 kinds of candidate liquids can be used for submerged cooling concentratorcells,and the power loss caused by dimethyl silicone oil is the minimum. Except for glycerol,the remaining ninecandidate liquids can be used for submerged cooled concentrating triple-junction cells. The power loss caused byTherminol VP-1 is the smallest,followed by dimethyl silicone oil.