Performance analysis of seasonal soil heat storage air conditioning system in solar ground coupled heat pump

Aimed to ground source heat pump's low coefficient of performance and regional requirement, solar-ground coupled heat pump system with soil heat storage has been advanced. Simulation analysis was done for the underground heat exchanger using finite element method. Variety trend of soil temperature with different depths, different running conditions and different properties of soil were revealed. The analysis results show that it is especially suitable for severe cold areas and provides theoretical basis for residential using.