聚光热电系统电池阵列特性及关联参数影响

THE PERFORMANCE OF SOLAR PV ARRAY FOR CONCENTRATING SOLAR PHOTOVOLTAIC/THERMAL SYSTEM AND EFFECT OF RELATED PARAMETERS

优选出性能较好的空间太阳电池阵列和砷化镓电池阵列进行聚光实验,研究两种电池阵列聚光特性和特性参数受聚光条件影响,对其建立数学模型,分析系统特性受关联参数的影响。实验表明,空间电池阵列I-V特性曲线随聚光比增加变成直线,其填充因子FF也随聚光比增加而减小,效率η先增加后减少,在8.48倍聚光比时达到最高为8.65%;砷化镓电池阵列I-V曲线随聚光比增加保持较好特性,填充因子FF有所下降,η增加。高光强引起温度的升高对电池阵列输出性能有较大影响,且砷化镓电池阵列受到的影响大于空间电池阵列。计算表明,系统特性参数对性能有不同程度的影响,其中,反射镜面光学效率对系统性能影响最大,为系统优化设计首要考虑因素。

The concentrating experimen of space PV array and GaAs PV array with good output performance was carried out, the performance of cell array and related parameters have been analyzed too in condition of solar concentrating radi- ation. The mathematic models for the effect of concentrating condition on concentrating and parameters were set up to an- alyze the effect of relative parameters on system characteristics. Experimental results show that the I-V characteristic curve of super PV array becomes linear and FF descends along with increasing concentrating times, the η increases and reaches tiptop when concentrating times is 8.48, then the η begins to drop. When concentrating times increase, the I- V characteristic curve of GaAs PV array always keeps better, the FF drops a little, the η increases. Performance of GaAs PV array is affected more seriously than space PV array by cell working temperature caused by higher concentrating light. System characteristic parameters have different degree effect on system performance according to the calculating re- sults. The effect of reflecting mirror optical efficiency on system performance is the most obvious and so the optic efficien- cy is the first thing must be considered in optimizing concentrating solar photovohaie/thermal system.