Research on the performance of solar-soil source composite heat pump system under various working conditions
SHAO Zhengri
KOU Wei
ZHAO Licai
YAN Changguo
Abstract：Based on the experimental results of the built solar-soil source composite heat pump system,the changes of various energies at the low-temperature heat source end when the solar heat collection heat of different temperature levels is added to the low-temperature heat source in different ways are analyzed,and the changes of the main performance parameters of the heat pump system under different working conditions are studied.The results show that timely adjusting the operating conditions according to the level of heat collection temperature can increase the heat absorption capacity of the heat pump unit while immediately storing heat to the soil source.The inlet and outlet temperatures of the evaporator and the difference between them all show a changing trend of first increasing and then decreasing.The variation trend of performance(COP)of the heat pump unit and the heat pump system is approximately the same as that of the inlet temperature of the evaporator.The former is always 1.7 to 1.9 higher than the latter,and the difference ΔCOP between the two also varies slightly with the evaporation temperature.
Keywords：solar energysoil sourceheat pump
Publication Date：2025-06-25
Online Publishing Date：2025-09-01(First online date of this platform, not the publication date of the document)
Pages：4( 42-45 )