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针对目前太阳能空气集热器普遍温度不高的情况,设计了一种新型的中高温太阳能空气集热器,采用复合抛物面聚光集热器(CPC)作为聚热部件,采用真空集热管作为集热部件,空气加热部分则由真空集热管和U型管之间热传递配合完成,真空集热管和U型管之间采用新型导热材料——石墨与甘油混合物作为传热介质,该集热器的多级串联可获得200℃以上的高温空气;为了评估该集热器的性能,对该集热器关键部分的传热特性进行分析,并对多级情况下的集热器的中高温性能进行初步实验研究。
Aiming at the current low temperature of solar air collector, a new type of mid-high temperature solar air collector is designed, which adopts the compound parabolic concentrating collector (CPC) as the heat collecting component and the vacuum tube as the heat sink The hot part and the air heating part are formed by the heat transfer and cooperation between the vacuum heat collecting pipe and the U-shaped pipe. A new heat conducting material, a mixture of graphite and glycerol, is used as a heat transmission medium between the vacuum heat collecting pipe and the U-shaped pipe. In order to evaluate the performance of the collector, the heat transfer characteristics of the key part of the collector are analyzed, and the performance of the collector in the multi-level case, that is, the high-temperature performance Conduct a preliminary experimental study.