Thermal storage characteristics of solar-ground source heat pump system

According to a practical project, tests the thermal storage characteristics of the solar-ground source heat pump system in three different conditions. The calculation results show that the thermal storage power of the combined system can reach the maximum value of 203.3 kW and the average value of 69.09 kW, which is 90% higher than that of single heat pump. The combined system significantly increases the underground thermal storage capacity, improves the stratum temperature, and is helpful to high efficient and stable operation of ground-source heat pump system in the northeast cold region.