Seasonal soil thermal storage in ground-source heat pump system with groundwater seepage

Establishes a mathematical model of soil heat transfer under heat transfer and groundwater seepage. For the single U-tube ground-source heat pump system, analyses the influence of the groundwater seepage on the soil temperature field under the condition of different groundwater seepage velocities and soil thermo-physical properties. For the pipe-group ground-source heat pump system, simulates the annual operating conditions of seasonal soil thermal storage and release, and obtains the distribution of soil temperature field at the end of different operating conditions in a cycle.