Energy and exergy analysis for ground source heat pump in Batman province climate conditions

This study aimed to experimentally research the energy and exergy properties of the horizontal type of ground source heat pump in the climate conditions of Batman province. For this purpose, a ground source heat pump and the earthed circuit were installed on the surrounding ground in the container placed in Batman University Batı Raman campus. The maximum temperature values of 5-10-20-50- 100cm soil thickness between 2016-2021 were taken from the Batman Directorate of Meteorology. It was observed as a result of the experimental measurements made during December that the soil temperature at 2 m depth was 21°C. The heat was drawn from the soil and 600m long earth heat exchanger pipes were placed at a depth of 2m for the system to work. Indoor temperature, outdoor temperature, inlet and outlet temperature of water (90%)-monoethylene glycol (10%) mixture to the evaporator, inlet and outlet temperatures of the refrigerant to the heat pump elements, and the flow and return temperatures of the heating water to the radiators were measured during the experiments. Moreover, compressor inlet and outlet pressures, flow rate, and power consumption of water-monoethylene glycol mixture and heating water were also measured. The highest COPip value was measured as 2.43 in the experiments carried out on December 2 while the highest COPip value was calculated as 2.40 on December 3. The highest COPIP value was calculated as 2.36 On December 4. The maximum COPsis value was measured as 2.26 in the experiments carried out on December 2 while the highest COPsis value on 3 December was calculated as 2.23. Finally, the highest COPsis value on 4 December was calculated as 2.20. Concerning the results of the exergy analysis of the system elements, the highest exergy loss values were measured as 0.84kW in the storage tank while it was calculated as 0.45kW in the compressor, 0.26kW in the evaporator, 0.23kW in the radiator, and 0.219kW in the condenser, respectively. The heat pump exergy efficiency was calculated as 36.17% and the TKIP system efficiency as 33.6%.