太阳能聚光电池肋型结构冷却特性的数值研究

Numerical study on cooling characteristics of solar concentrating cellswith fin structure

太阳电池可以直接将太阳能转化为电能,但工作温度过高会极大影响光电转换效率甚至损坏电池,特别是在高倍聚光条件下,保持电池温度均匀性具有重大意义。因此,在研究中,需要将直肋式换热器、针肋式换热器、三角肋式换热器与高倍聚光电池结合起来综合考虑。在电池温度均匀性方面,直肋式换热器下的电池能较好地保持温度场的均匀,并且光电转换效率均优于其他两种情况;当风速超过2 m/s,聚光比为1000时仍可以保持在最佳工作温度范围,光电转换效率超27%。

Solar cells can directly convert solar energy into electrical energy,but too high operating temperature will greatly affect the photoelectric conversion efficiency and even damage the cell.Especially under the high condensing energy,it is of great significance to maintain the temperature uniformity of the cells.Therefore,the straight fin heat exchanger,the needle fin heat exchanger,the triangular fin heat exchanger and the high concentrating cell were combined for comprehensive research.Taking into account the uniformity of the cell temperature,the cell under the straight fin heat exchanger can better maintain the uniformity of the temperature field,and the photoelectric conversion efficiency is better than the other two cases.When the wind speed exceeds 2 m/s,it can still be maintained in the optimal operating temperature range when the concentration ratio is 1000,and its electrical efficiency can be maintained above 27%.