Extension Synthetic Evaluation Of The Operation Of The Ground Source Heat Pump In Winter In Hunan Province

The exploration and utilization of sustainable resource has been attachedincreasing emphasis, as the deterioration of energy crisis and environmental pollutionwith the social and economic development. Ground-coupled heat pump boasts energysaving effects with the ground as the cooling and heating source for air conditioningsystem. This dissertation aims to conduct an extension comprehensive evaluationunder the heating mode in winter with a project case.Based on the heat exchangers of ground buried heat pump system, the flowsheeton calculation of performance coefficient HSPF during heating season and someparameters are determined. The simulation program for ground source heat pumpoperation is acquired with matlab, and performance coefficient HSPF in heating modeis calculated through hourly accumulation. The simulation results and measured dataare used to analyze the energy consumption, economic and environmental protectioncharacteristics of the system.From the aspects of consumption, economy and environmental protection, anindicator system is developed to evaluate the operation performance in winter, whichincludes initial cost, maintenance fee, added investment, heat exchange capacity perwell depth, transport efficiency of pumps, pollutant discharge, temperature increaseper heat exchange and the floor space of heat pump system. Fuzzy AHP is taken todistribute the weight of each evaluation indicators. The matter element, classicaldomain and joint domain are formed, which set a basis for the multi-level extensioncomprehensive model and the evaluation of all the indicators. In order to verify theeffectiveness of the extension comprehensive evaluation, the fuzzy comprehensiveevaluation is chosen to evaluate the system which reveals a good agreement withmulti-level extension comprehensive evaluation. The features and advantages of thismethod for heat pump system is also analyzed.