CAJ | 학술논문

基于太阳能选择性吸收涂层的辐射性能,建立聚光太阳能吸热管光热耦合传输的数理模型,理论研究聚光太阳能吸热管的吸热传热特性.研究表明,吸热管壁温度随着聚光能流密度增加而线性升高,而吸热效率在中等聚光能流密度时达最大值.太阳能选择性吸收涂层性能对吸热传热有重要影响,具有低红外发射系数涂层的系统吸热效率明显较高,而红外辐射能量损失率则在中等聚光能流密度时最小.管内强迫对流可以显著提高吸热管效能.吸热效率随流速增加而提高,而管壁温度则显著下降.
기우태양능선택성흡수도층적복사성능,건립취광태양능흡열관광열우합전수적수리모형,이론연구취광태양능흡열관적흡열전열특성.연구표명,흡열관벽온도수착취광능류밀도증가이선성승고,이흡열효솔재중등취광능류밀도시체최대치.태양능선택성흡수도층성능대흡열전열유중요영향,구유저홍외발사계수도층적계통흡열효솔명현교고,이홍외복사능량손실솔칙재중등취광능류밀도시최소.관내강박대류가이현저제고흡열관효능.흡열효솔수류속증가이제고,이관벽온도칙현저하강.
The heat transfer model of the concentrated solar receiver pipe was established.The temperature of the pipe wall almost linearly increases with the concentrated energy flux, while the heat absorption efficient approaches to its maximum at moderate concentrated energy flux.The properties of the solar selective coatings play an important role in the heat absorption and transfer porcess, and the pipe has higher heat absorption efficient with lower emissivity.The heat loss ratio of the reflection radiation has direct relation with the reflectivity, while the heat loss ratio of the natural convection decreases as concentrated energy flux rising.Specially, the heat loss ratio of the infrared radiation has maximum at the moderate concentrated energy flux.The heat convection inside the pipe can enhance the performance of the receiver pipe, and the absorption efficient will increase as the flow velocity rising, while the pipe wall temperature drops quickly.