空间热辐射对激光输能光电池特性影响研究

Effect of thermal radiation in space on photovoltaic cell

从激光辐照功率密度、光电池温度和光电转换效率的相互关系出发,基于热辐射平衡原理,建立了空间热辐射环境下光电池热辐射稳态平衡模型,根据该模型可以分析激光辐照功率密度、光电转换效率和光电池温度的相互影响。对已有的光电转换效率模型做温度上的修正,得到温度修正后的转换效率模型,将上述两个模型结合,即得到空间热辐射环境下激光辐照功率密度、光电池温度和转换效率的关系。通过MATLAB软件对模型进行仿真,仿真结果表明,随着激光辐照功率密度增加,光电池温度不断上升,光电转换效率和输出功率密度先上升后下降,但最大光电转换效率对应的激光辐照功率密度远小于最大输出功率密度对应的激光辐照功率密度,且日照区光电池温度高于地影区,日照区转换效率低于地影区。

On basis of the thermal radiation equilibrium principle,and considering the relations between laser power density,photovoltaic cell temperature and photoelectric conversion efficiency,the thermal radiation equilibrium model of photovoltaic cell under space thermal radiation is established. By using this model,the effect of laser power density and photoelectric conversion efficiency on the cell temperature can be analyzed. By correcting the original photoelectric conversion efficiency model from the temperature,a new model is obtained. Based on the thermal radiation equilibrium model and modified photoelectric conversion efficiency model,the relations between laser power density,cell temperature and photoelectric efficiency can be analyzed by using MATLAB software. The simulation results show that,with the increase of laser power density,the cell temperature will keep rising,but the photoelectric efficiency and output power density will firstly increase and then decrease. And the cell temperature in daytime is higher than at night,and the photoelectric efficiency in daytime is lower than at night.