Influence of ground-source heat pumps on soil temperature field in Daqing

 In order to study the operation scheme of ground-source heat pump systems, simulates the annual dynamic load of a building, and the soil temperature field and system COP under different operation modes and different spacing of buried pipes of the ground-source heat pump in Daqing. The simulation results show that the soil temperature recovery rate is 0.45 ℃ per month. Considering the soil temperature recovery and economics, the spacing of buried pipes of buildings with 25 times of difference between cooling and heating loads should be set to 6 m. If a ground-source heat pump system is used for building heating and cooling in a severe cold zone like Daqing, the spacing of buried pipes should be increased and auxiliary devices should be added to eliminate the soil thermal imbalance.