燃烧供热热光伏系统实验研究

针对未来深空探测供电需求，设计了一套热光伏发电系统，采用丙烷燃烧器模拟同位素热源，并利用低禁带GaSb电池实现了系统的热电转换。研究了气体流量、过量空气系数、回热器性能、滤波器等对辐射器温度及电池输出功率、系统转换效率的影响。结果表明：电池输出功率随燃气量单调增加，而在一定燃气量下，存在一最优过量空气系数使其达到最大值；同时，回热器和滤波器对辐射器温度和电池输出特性有很大影响；本实验系统可以实现最大输出功率密度0.45W/cm 2，系统转换效率2.8%。

Experimental Investigation of the Combustion Powered TPV System

Aiming at the power requirement for deep space exploration, a set of thermophotovoltaic system is designed in this article, while the isotope heat source is substituted by propane combustor. The GaSb cell is employed to realize the conversion from heat to electricity. The effects of gas flow rate, excess air ratio, performance of recuperator and filter on emitter temperature, cell output power and system efficiency are evaluated. The results indicate that the cell output power increases with rise of the combustion gas, and there is an optimal equivalence ratio at which the highest electric power is gained at a fixed combustion gas flow rate. Also, the recuperator and the filter have great influence on the system performance. The setup in this paper can gain a electric power density as high as 0.45W/cm 2 and system conversion efficiency of 2.8%.