Design, manufacture and analysis of a geothermal heat pumps

Due to the necessity to achievement of heat pump manufacturing technology as an important step in the development of geothermal systems, a heat pump is designed, manufactured and analyzed in different operating conditions. The heat pump is water to water type which is extensively used for heating buildings in winter. A sample of a heat pump from a famous manufacturer is selected to dissemble and thermodynamic, heat transfer and hydraulic analysis has been done on it. By considering the indigenous capabilities in preparing components, the heat pump is designed and manufactured build a sample with a favorable performance and low power consumption. Then, the sample was tested according to valid standards and the coefficient of performance and thermal behavior of the heat pump was investigated. Test results show a favorable performance of heat pump when the condenser outlet temperature is in the range of 30-45 ̊C. Finally, the heat pump is installed in a building and its performance is evaluated in real operating conditions. In this assessment, the COP of heat pumps changes between 4 and 7 via temperature of the output water of the condenser.