Abstract: In order to disclose the mechanics of heat and mass transfer between mine return air and water in mine return air shower heat exchanger (MRASHE), firstly, heat and mass transfer theories between air and water are employed to identify the changing process in mine return air and droplets states under the operating conditions of heating. And then, mathematical model of heat transfer efficiency of MRASHE under the operating conditions of heating is developed based on the heat balance equation of air-water heat transfer, and the overall and general heat transfer efficiency models in the process of cooling and drying process, which is very significant to guide the design and operation of MRASHE.

Key words: mine return air shower heat exchanger, heat transfer efficiency, mathematical model, study