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介绍了一种带有相变蓄热装置的直膨式太阳能热泵系统。以青岛天气为例,对该系统的蓄热模式进行数值模拟,得出蓄热装置进出口制冷剂的温度、蓄热材料的液相率随时间的变化,结果表明在太阳能辐射量变化时,该系统的蒸发温度维持25℃左右,系统能够稳定运行;对系统热力学性质进行理论计算得出系统在冷凝温度为70℃时,系统的COP能维持在5.3左右,系统能够高效运行。
A direct expansion solar heat pump system with phase change thermal storage device is introduced. Taking the weather in Qingdao as an example, the numerical simulation of the regenerative mode of the system was carried out, and the temperature of the refrigerant at the inlet and outlet of the regenerator was obtained. The liquid phase ratio of the regenerative material changed with time. The results show that when the solar radiation changes, The temperature of the system is maintained at about 25 ℃, and the system can run stably. The theoretical calculation of the thermodynamic properties of the system shows that when the condensing temperature is 70 ℃, the COP of the system can maintain around 5.3 and the system can operate efficiently.