The Study of Coal Mine Abandoned Freezing Tube as Heat Transfer Tube of Ground Source Heat Pump

China is one of the countries of using freezing method to sink through thickest topsoil in the word. Based on a coal mine instance, the feasibility of using freezing tube as ground source heat pump heat exchanger is analyzed by the numerical simulation techniques. Research results show that it can achieve cold and heat utilization of deep strata, and also achieve the waste utilization of freezing hole, which opens up a new heating way of the heat pump technology in coal mine.