Heating experiment of solar-ground-source hybrid heat pumps

Conducts the heating experiment for ground-source heat pump with single underground exchanger well (simulating the situation of insufficient heat exchange area) and solar-ground-source hybrid heat pump on the established experiment table. The results show that when the ground-source heat pump with single underground exchanger well is in operation, the outlet water temperature of the condenser is only about 35 ℃ and the evaporator will freeze some time later resulting in frequent start-stop of the compressor, and that when the hybrid heat pump is in operation, the evaporator pressure keeps at a high level and the outlet water temperature of the condenser reaches about 43 ℃, sufficient to meet the heating demand of fan coil units in winter, and the average heating coefficient of performance of the hybrid heat pump is 3.7.