EXERGY ANALYSIS OF BUILDING HEATING WITH A GROUNDWATER SOURCE HEAT PUMP

Abstract

The paper presents an exergy analysis of the groundwater heat pump operation for the needs of building heat-ing. The analysis was conducted on a monthly basis, given the dependence of exergy on the changing state of the envi-ronment. Changes in heating coefficient and exergy efficiency of the geothermal heat pump heating system depending on the influential parameters were analyzed: groundwater temperature from the pumping well, changes in the ground-water temperature on the heat pump evaporator and water temperature in the heating system. The obtained results provide insight into thermodynamic indicators of heat pump operation depending on the groundwater temperature and the operation mode of the building heating system. The conducted analysis provides guidelines for the design and optimization of heat pumps that work with groundwater as a heat source.