Energy Efficiency Analysis And Energy-saving Technology Of Air-conditioning Operation In Office Buildings

In the face of C hina’s existing 47 billion square meters of existing buildings and an annual increase of 16 to 20 million square meters,which consumes 20% to 30% of our total social energy consumption,including public buildings,the proportion of energy consumption maximum.In the energy consumption of public buildings in the air-conditioning system,the proportion of energy consumption increased year by year,has reached the total energy consumption of such buildings more than 50%,so the energy-saving air-conditioning system to carry out energy-saving emission reduction work in C hina has far-reaching significance.In this paper,the air conditioning system of the three office buildings in Beijing is taken as the object of study.Through the investigation,the energy consumption and related operating parameters of the air conditioning system of the three office buildings are obtained,and the complete refrigeration season is collected.Run the data.According to the research data comparison of the project power consumption,water consumption,analysis of energy-saving projects potential.Comparison of air conditioning system parts of the proportion of energy consumption to determine the focus of energy-saving transformation.Based on the data of air conditioning system operation,the curve of cooling capacity,power and load rate of chiller is drawn,and the running status of each unit is analyzed.The temperature of chilled water and cooling water supply Cause.To summarize the factors that affect the operation of the air conditioning system,taking project 1 as an example,the study focuses on the calculation of COP,IPLV,ER,and evaluates the operational status of the relevant equipment of project 1.Using Hongye annual load calculation and energy consumption analysis software to project 1 as an example to establish a model,can accurately reflect the actual project load demand model,the simulation of the project’s annual energy consumption of 524740.22 KWh.Based on the actual research data of the project and the simulation results of the Hongye load software,the practical operation of the chiller,the pump and the cooling tower is obtained,and the feasibility of the application of the magnetic levitation chiller and the exhaust heat recovery device is evaluated.To solve the problem of air conditioning system equipment operation as the focus,put forward the energy-saving transformation program for the replacement of cold water unit for high COP frequency conversion unit,freezing,cooling water pump frequency,cooling tower fan frequency,packing and tower repair,change the air conditioning system operation mode.The renovation program air conditioning system a cooling season is expected to total energy consumption of 416749.7KWh,is expected to save energy 107990.48 KW.