Research On Comprehensive Performance Index Of Existing Ground-sourced Ground Heat Pump System

As an internationally recognized energy saving and environment-friendly air-conditioning heating technology,ground source heat pump technology has made great progress in China in recent years.However,how to judge the actual operation effect of an existing ground source heat pump system qualitatively and quantitatively has become a difficult problem in the industry.In other words,At present,the evaluation standard of comprehensive performance index of ground source heat pump system is not perfect.So it is very necessary to establish a set of evaluation system of performance index of ground source heat pump system to measure the operation effect of an existing ground source heat pump system qualitatively and quantitatively.Firstly,this paper presents a new method to evaluate the performance of ground source heat pump system based on the characteristics of ground source heat pump system.This method selects evaluation indexes from four aspects: economy,technology,energy conservation and environmental protection.And by hierarchical classification of selected indicators,the hierarchical subordination of each index is determined.Then using the extension analytic hierarchy process and fuzzy comprehensive evaluation method,the influence weight of each performance index on the overall performance of the system was calculated.Through consulting the relevant national standards of ground-source heat pump system and combining the engineering data of investigation,the scoring interval of each performance index is divided,and the scoring standard of performance index of ground-source heat pump system is established.The construction of the whole performance index evaluation system is completed.Finally,the evaluation system is used to evaluate the operation effect of twoengineering examples.The evaluation results are consistent with the actual situation,and the correctness and feasibility of the system are verified.It is concluded that this system can be used to evaluate the operation effect of a ground source heat pump system.The evaluation system of this subject can provide reference for the evaluation of other forms of ground source heat pump system,which is helpful to the rapid development of the ground source heat pump industry and also has a certain reference value for the rational design of the ground source heat system.