Combining with the climate characteristics of large temperature difference between day and night in Xinjiang region,this paper sets up a set of small solar heat collection-sky radiation cooling dual-purpose system in Urumqi.By comparing the number of PE wind cover film layers and testing the system operating results under different flow rates,the heat collection/cooling potential of dual-purpose device is explored.The test results show that the maximum temperature difference between inlet and outlet of the system is 6.40℃and the maximum instantaneous heat collection power is 721.88 W/m2 under the daytime heat collection mode.In the night cooling mode,the maximum inlet and outlet temperature difference is 0.94℃,the outlet temperature is 1.43℃lower than the ambient temperature,and the maximum instantaneous cooling power is 50.89 W/m2,which provides the possibility for its practical industrial heat collection application and the preparation of high temperature chilled water in the local temperature and humidity independent control air conditioning system.
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维普
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