为降低多孔介质高温吸热器的辐射散热损失,设计一种玻璃套管-多孔介质双层吸热芯。采用实验测量和蒙特卡洛数值模拟方法,定量分析双层吸热芯的多光谱热辐射传输特性。结果表明,绝大多数太阳辐射外热源在双层吸热芯的内部被吸收（多孔介质入口段）。当工作温度为1000 K时,双层吸热芯的太阳光吸收比与自身红外辐射发射比之比达到约2.0,其辐射热效率较单层多孔介质吸热芯高约30%。
Abstract
In order to reduce the re-radiation of the solar volumetric absorbers, a double layer absorbers that was made up of multiple tubes and the porous was proposed. The thermal radiation performances of the double layer receiver were carried out by experiment test and the Monte Carlo method （MCM）. Results show that the most of the solar thermal resource is absorbed by the inlet section of the porous. When the working temperature is equal to 1000 K, the ration of the solar absorption and the emission of the double layer is up to 2.0. Moreover, the radiation thermal efficiency of the double layer receiver is about 30% higher than that of the monolayer porous receiver.
关键词
太阳能吸热器 /
多孔介质 /
蒙特卡洛法 /
辐射传输 /
热效率
Key words
solar absorbers /
porous materials /
MCM /
radiation transfer /
radiation thermal efficiency
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参考文献
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基金
国家自然科学基金（51806037; 52176181）
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