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通过实验测试和数值模拟对太阳辐射能量转换器(solar energy converter)及其填充的泡沫陶瓷辐射吸收特性、气流流动和换热特性进行研究。研究结果表明:应用Lacoix模型建立太阳辐射能量转换器内填充SiC泡沫陶瓷气流流动模型是合理的。在实验条件下,太阳辐射能量转换器出口处流通空气温度可达600.82K,太阳辐射辐射能转换为流通空气热能的效率可达51%;在相同条件下,随着太阳能反射镜的有效辐射面积和辐射强度的增加,太阳辐射能量转换器出口处流通空气温度几乎呈线性增长;随着泡沫陶瓷孔隙率增大,太阳辐射能量转换器出口处流通空气温度先增大后减小。
The radiation characteristics, airflow and heat transfer characteristics of solar energy converters and their foamed ceramics are studied by experimental tests and numerical simulations. The results show that it is reasonable to use the Lacoix model to build the flow model of SiC foam ceramic filled with solar radiation energy converter. Under the experimental conditions, the temperature of the circulating air at the exit of the solar radiation energy converter can reach 600.82K, and the conversion efficiency of the solar radiation energy into the circulating air heat energy can reach 51%. Under the same conditions, with the effective radiation area of the solar reflector And the radiation intensity increases, the temperature of the air at the outlet of the solar radiation energy converter almost linearly increases. With the increase of the porosity of the foam ceramic, the temperature of the air at the outlet of the solar radiation energy converter first increases and then decreases.