Application of numerical simulation of underground water temperature to groundwater source heat pump engineering

Establishes a coupling numerical model of underground water flow and water temperature for analysing the rationality of designing structure of the composite wells and the extent of underground water heat leak for the groundwater source heat pump (GSHP) engineering of a residential quarter in Shenyang, and simulates and forecasts the underground water temperature change trend for different heat transfer temperature differences. The results show that the structure of composite well can meet the requirements of injecting and pumping for the GSHP engineering, and adopting 5 ℃ of temperature difference is more rational and safe than 7 ℃. Based on the running of a heating period and the actual monitoring to underground water temperature, the accuracy of simulated results is proved.