Thermal Performance of a Multi-channel Flat Tube Thermal Storage System Using Multiple Phase Change Materials
In view of the problem that the temperature difference of the multi-channel flat tube single-stage heat storage device gradually decreases and the heat transfer is uneven during the charg-ing and discharging process,this paper proposes a multi-channel flat tube cascade phase change heat storage system which includes two-stage devices,52 # paraffin and lauric acid as phase change mate-rials(PCM)filled in the cascade heat storage devices.Water was used as heat exchange fluid,charging and discharging characteristics for the cascade phase change heat storage system under different inlet temperatures and different flow rates were investigated.The experimental result showed that com-pared with flow rate,inlet temperature of the heat exchange fluid has a greater impact on the heat transfer performance of the cascade heat storage system.When the inlet temperature of the heat ex-change fluid increases(decreases)or the flow of the heat exchange fluid increases(decreases),the charg-ing(discharging)time of the cascade heat storage system decreases,the charging(discharging)power increases.
multichannel flat tubecascade heat storagephase change heat storagecompact fins
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NSTL
万方数据
维普
