Evaluation of low temperature geothermal energy through the use of heat pump

A water-to-water geothermal heat pump (GHP) running on R-22 was designed to evaluate disposed geothermal water from geothermal health resort centres in Erzurum. The GHP uses geothermal water at 35°C temperature and provides clean water at 45°C for a floor heating network. The GHP heating capacity was around 7.2 kW, and an electric driven hermetic R-22 compressor was used. The overall coefficient of performance was determined as 2.8.