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本文提出了一种采用微细通道的平板式集热板/蒸发器,它可以从太阳和环境空气二方面获取热量。其主要特点是采用树形分支模型,由两块铝板冷轧吹胀而成,减小了接触热阻,提高了集热板的换热系数。本文建立了该集热板/蒸发器的数学模型并进行了热性能分析,深入研究了不同环境工况条件下该热泵热水系统的性能,包括系统性能系数(COP)、集热板集热效率、加热时间等运行参数的变化特性。结果显示,将150 L水从15℃加热到50℃时,系统全年各月的平均COP为4.76,平均加热时间为314 min,环境温度的升高和太阳辐射强度的降低会使集热效率显著增加。
This paper presents a flat-panel collector / vaporizer with tiny channels that takes heat from both the sun and the ambient air. Its main feature is the use of tree branch model, made of two aluminum cold-rolled expansion, reducing the contact resistance and improve the heat transfer coefficient of the collector. In this paper, the mathematical model of the collector / evaporator is established and the thermal performance analysis is carried out. The performance of the heat pump hot water system under different environmental conditions is studied in depth, including the coefficient of system performance (COP), collector efficiency , Heating time and other operating parameters of the changing characteristics. The results showed that when 150 L water was heated from 15 ℃ to 50 ℃, the average COP of each month was 4.76 and the average heating time was 314 min. The increase of ambient temperature and solar radiation intensity resulted in a significant efficiency of heat collection increase.