COMPREHENSIVE BENEFIT ANALYSIS OF GROUND SOURCE HEAT PUMP SYSTEM

Based on the method of Net Annual Value and the efficiency evaluation factors of ground source heat pump system ( GSHP) ，this paper proposed a comprehensive benefit evaluation model． Taking a project in Tianjin as an example，an integrated comparison of GSHP and distributed cooling machine + municipal heating network system showed that the former had remarkable economic and environmental benefits． The increase earnings in NVA of GSHP was 162. 8 million yuan，saving annual operating costs of 51. 3 million yuan and standard coal of 481. 4t． The study analysed the FIＲＲ of GSHP by using the sensitivity analysis method，providing a reference for optimizing the investment and evading risks．