抄録
We manufactured a Ground Source Heat Pump (GSHP) system of the test model and investigated the Coefficient Of Performance (COP) of a fabricated GSHP system by experiment in the laboratory. This GSHP system was fabricated using common commercially available equipment. Using such equipment helps to provide at a low price for the market. The COP was estimated by using the refrigerant enthalpy method with pressure and temperature fitting. Furthermore, we evaluated the COP by using the calorimetry method that measures the heat transfer rate of the chilled water in the evaporator and the cooling water in the condenser. As a result, while the estimated COP using the refrigerant enthalpy method decreases with increasing mass flow rate of chilled water in the evaporator, the estimated COP using the calorimetry method showed a peak at 4 kg/min.
