聚光和冷却条件下砷化镓电池特性研究

Characteristics of GaAs battery in concentrating and cooling

为了能够更有效地提高太阳能综合利用效率,首先建立了在聚光条件下能够反映砷化镓光伏电池热、电特性的模型,然后利用该模型对电池的输出特性进行计算,根据计算结果分析了传热过程中的冷却热阻对电池温度、光学转换效率以及电能输出功率的影响。实验研究了砷化镓电池阵列的I-U曲线、填充因子FF以及转换效率h随聚光比的改变而改变的变化情况;同时也从实验角度探讨了电池工作温度对FF、h和最大输出功率Pm的影响。该研究为聚光和冷却条件下的光伏电池热电联供PV/T系统的设计与优化提供了依据。

In order to effectively improve the comprehensive utilization efficiency of solar energy, a model was established, which could reflect the heat and electrical characteristics of concentrating gallium arsenide photovoltaic cells. And then based on this model, the output characteristics were calculated. According to the calculated results, the influence of the cooling thermal resistance in the heat transfer process on the temperature of the battery, optical conversion efficiency and power output power were analyzed. In addition, the I-U characteristics curve of gallium arsenide battery array, fill factor （FF） and conversion efficiency＇s alteration with the changes of concentration ratio were discussed. At the same time, the influences of the battery temperature on FF, η and Pm were studied from the point view of experiment. This research provides foundation for the design and optimization of PV/T system in concentrating and cooling photovoltaic cells.