太阳电池板热真空试验降温过程分析

The temperature falling process in solar panel in thermal vacuum test

为了得到太阳电池板在热真空试验降温时的正、背面温差和温度变化规律,文章建立了太阳电池板的热物理模型,根据太阳电池板厚度、背面发射率、纵向当量导热系数、高温平衡时的正面温度以及热沉温度,推算出电池板在高温平衡时的背面温度,进而得出电池板的正、背面温差;采用集总参数法进行分析,得出电池板降温时的降温时间表达式及电池板温度与时间的关系式;经过理论计算与试验数据的对照分析表明,降温时间理论表达式可以近似作为电池板降温时间的预测依据。研究结果可以为电池板热真空试验的热分析、电池板降温过程预测以及低温控制提供参考。

To determine the temperature difference between the front side and the back side of a solar cell panel and the temperature variation during its temperature falling process,this paper employs a thermo-physical model of the solar cell panel in thermal vacuum tests.According to the thickness,the back-emissivity,the equivalent longitudinal conductivity factor of the panel,and its front temperature at a high temperature balance as well as the heat sink temperature,the temperature difference between the panel＇s back side and the front-back is obtained.With the lumped parameter method,the expression of the time taken for the panel＇s temperature falling and the variation of the temperature against time during cooling are derived,which may be used to predict the time taken for the panel＇s temperature falling approximately.The analysis result can be used for the thermal analysis and forecasting the temperature falling process of solar cell panels,and for controlling the low temperature point in thermal vacuum tests.