微热光电系统燃烧器辐射光谱分析及温度预测

Spectral analysis of radiation material on combustor in micro-thermophotovoltaic system

通过实验,测量出SiC和Al2O3两种不同材质的微燃烧器在不同温度下的光谱辐射曲线。比较分析各影响因素不变时外壁面的辐射能谱。结果表明:GaSb电池高效接受光电子的波长范围内,Al2O3材质的微型燃烧器在其能够达到的温度范围对提高微型热光电系统的热电转化效率有更为明显的作用,而这个温度界限通过实验很难确定。根据自身"小样本,贫信息"的特点,采用灰色理论建立灰色预测模型并得出温度在1 418K内,Al2O3的Eλ0-1.7较SiC更高。

The optical radiation curves of SiC and Al_2O_3 micro combustors at different temperatures were tested and the radiation energy spectrum of external wall surface with affecting factors kept constant was analyzed.Test results showed that,in the wavelength scope of photoelectrons efficiently absorbed by the GaSb cell,the Al_2O_3 micro combustor showed a more significant role in improving the thermoelectric transformation efficiency of a Micro Thermophotovoltaic(MTPV) at the accessible temperature scope,which was difficult to be determined in the test.According to its characteristics of small sample and poor information,the gray theory was used to establish a gray prediction model,concluding that the transformation efficiency of Al_2O_3 micro combustor was higher than that of SiC micro combustor at 1 418 K.