老化试验对浸没冷却聚光电池液体性能的影响  

EFFECT OF ACCELERATED LIFETIME TESTS ON PROPERTIES OF LIQUIDS FOR CONCENTRATOR SOLAR CELLS COOLING APPLICATIONS

作　　者：韩新月[1] 陈晓彬 郭永杰[1] 薛登帅 Han Xinyue;Chen Xiaobin;Guo Yongjie;Xue Dengshuai(School of Energy and Power Engineering,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]江苏大学能源与动力工程学院

出　　处：《太阳能学报》2019年第12期3477-3484,共8页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金（51306077）;江苏省自然科学基金（BK20130518）;江苏大学“青骨教师培养工程”培育项目

摘　　要：测试分析适用于浸没冷却Ⅲ-Ⅴ族聚光三结电池的候选液体分别经受紫外、湿热和高低温老化试验的光谱透过率。老化试验后液体平均透过率的分析表明二甲基硅油下降最小,分别为-0.42%、-0.26%、-0.22%。通过引入的归一化光电流密度定量分析老化试验后液体透过率变化对电池电性能的影响,计算结果表明试验后二甲基硅油对应的Jnp相对变化率最小,分别为-0.18%、-0.03%、-0.09%,其余5种矿物油的可靠性也满足要求。液体红外光谱分析表明紫外光、湿气、高温等环境因素可促使液体分子发生碳链断裂,而断裂处碳原子与O2结合形成酮羰基是导致液体性能下降的主要原因。The optical transmittance of several liquid candidates forⅢ-Ⅴtriple-junction solar cells cooling applications was investigated before and after exposure to UV light,damp heat and low-temperature followed by high-temperature accelerated lifetime tests.The results show that the smallest percentage change in the average transmittance of liquid candidates after exposed to tests was dimethyl silicone oil,which is-0.42%,-0.26%,-0.22%,respectively.In addition,in order to evaluate the effect of transmittance loss,the normalized photocurrent density(Jnp)loss caused by the decrease in optical transmittance experienced by each liquid were calculated for triple-junction solar cells.The most stable liquid is found to be dimethyl silicone oil.The percentage change in Jnp of the triple-junction solar cells when illuminated by the solar spectral irradiance filtered by dimethyl silicone oil after subjected to UV light,damp heat and low-temperature followed by high-temperature accelerated lifetime tests are-0.18%,-0.03%,-0.09%,respectively.The other five mineral oils were demonstrated as appropriate to be utilized for triple-junction concentrator solar cells cooling applications.Finally,based on the analysis of the FT-IR spectra of these liquids,we find that UV light,moisture and high temperature result in the carbon bond breakage in the liquid molecules,and then forms the keto-carbonyl with the oxygen in the air.This is the main reason for the degradation in the optical transmittance of the liquid candidates after exposed to the tests.

关 键 词：太阳能 聚光器 太阳电池 浸没冷却液体 加速老化试验 

分 类 号：TK514[动力工程及工程热物理—热能工程]