Experimental Study And Energy-saving Operation Optimization Of Air Source Heap Pump Air Conditioning System

Building energy consumption is a main part of total social energy consumption,and energy consumption of heating ventilation and air conditioning ia the main part of building energy consumption.So,air conditioning energy saving plays a significant role in current energy structure.In this paper,based on an air source heat pump&fan coil air conditioning system in an office building in Shanghai,an annual operation experiment is carried out to analyze system operation performance and energy saving potential.Then,a comprehensive simulation of indoor sirflow organization for building indoor air conditioning area is simulated by software.What's more,some optization proposals are suggested and some practical application effects of those proposals are simulated.The goal is to provide some experiences and references of building air-conditioning energy saving technology.First,based on an air source heat pump&fan coil air conditioning system in an office building in Shanghai,the main components such as heat pump outdoor host,indoor terminal device,hydraulic module and fresh air handling unit are designed and selected.Then,an annual performance experiment is carried out,the system performance and energy consumption is analyzed by summer and winter datas.The results show that this air conditioning system could provide a comfortable thermal environment for building with SEER of 2.13 and APF of 2.045.Second,a detailed simulation of indoor airflow organization for second floor is made by Airpak.Results show that indoor air flow field,temperature field and PMV field in second floor could meet the indoor comfortable demand.Then,total air conditioning area model in this building is established with simplified heat source.Based on the model verification,airflow origanzation in this build is simulated.The results show that though the mean temperature between each floor exists some difference,but the termperature distribution in each floor is uniform,the temperature standard deviation is about 1?.Courtyard could affect temperature distribution in heating condition,it makes the temperature in first floor lower and temperature in forth floor higher.Third,the effects of different building envelopes and natural ventilation in transition seasons are simulated.The results show that the increase of building envelope insulation performance could improve the indoor thermal comfort and reduce building energy consumption.And using combine operation of natural ventilation and fresh air system could save the operation energy consumption for air conditioning about 4905 k Wh a year.In design and operation period for air conditioning system,according to optimized components selection,control of supply and return water temperature and automatic control of system could enhance energy saving performance and reduce energy consumption.