Abstract: In order to improve the quality and efficiency of coalfired boilers,an iron mine decided to transform its coalfired boiler into a water source heat pump air conditioning system by analyzing the actual conditions and economic comparison of the mine.The total investment of the project is more than 13 million,which took four months to complete.Through the before and after comparison,it can be seen that the water source heat pump air conditioning system has played a role of energy conservation and emission reduction,environmental protection and high efficiency.The correct promotion and use of water source heat pump will have a profound impact on the energy conservation and emission reduction in China.

Key words: Underground mine,Energy conservation and emission reduction,New energy,Water source heat pump