On-site measurement and analysis on energy consumption and energy efficiency ratio of medium-depth geothermal heat pump systems for space heating

Presents the system composition, basic information of projects and monitoring points layout. Based on more than forty-eight hours’ continual monitoring, obtains the actual operational condition of the medium-depth geothermal heat pump systems. Presents the continual monitoring results of outlet water temperature in the heat source side of several common heat pump systems. The comparison shows that outlet water temperature of heat source of the medium-depth geothermal heat pump systems is obviously higher than other conventional heat pump systems. The calculation result shows that heat charge rate per unit length of heat exchanger in heat source side of medium-depth geothermal heat pump system reaches 2.0 to 3.6 times of that of conventional ground-source heat pump system, and that the energy efficiency ratios of units and system are both improved, and that the medium-depth geothermal heat pump system is suitable for space heating of residential buildings.