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Study on the Solar Collecting Performance of Vacuum Glass Casing & Metal Tube Compound Receiver
Author(s): 
Pages: 867-870
Year: Issue:  5
Journal: Journal of Engineering Thermophysics

Keyword:  太阳能 玻璃真空套管 金属管接收器 传热模型;
Abstract: 采用稳态传热平衡原理,分析了玻璃真空套管-金属管复合太阳能接收器的集热过程,建立了稳态传热模型。利用该模型系统地研究了接收器在不同工况下的集热性能。模拟结果表明:这种结构的接收器受外界环境影响很小,真空套管和金属吸热管之间环形空间的辐射换热是系统热损失的主要环节,提高表面选择性吸收涂层的性能以减小系统发射率是接收器优化设计的重要方向;集热效率随太阳辐照度和聚光比的增加而增大;接收器长度和进口温度的增大有助于提高工质出口温度,玻璃真空套管-金属管复合接收器有着良好的集热性能。
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