DESIGN OF PHASE CHANGE THERMAL STORAGE DEVICE IN THE THERMAL UTILIZATION OF SOLAR ENERGY

In order to improve the light and thermal utilization efficiency of solar water source heat pump,this articletakes non-straight-expanding solar heat pump system(NSESHPS)as the research object from the point of system. Throughthe fluent simulation and experimental research method,chose of phase change materials in phase change thermalstorage device and the arrangement of thermal storage unit and uniform flow orifice in tank have been made. The resultsshowed that the thermal collection efficiency of the solar heating system increases from 64% to 94%,the COP increasesfrom 2.32 to 6.18 after increasing a phase change thermal storage device.