Analyse Of All-Year Operating Energy Efficiency Of Central Air Conditioning System

Along with urbanization of China, energy consumption increases steadily. At present, it is not maintain continuous high speed development that low utilize rate of energy source and energy source storage. Energy conservation becomes the theme of energy source. The more central air conditionings use in buildings, the more proportion of energy consumption in constructions, which draw the attention of the air conditioning engineers's. In this thesis, the theme is the analysis of the seasonal central air conditioning system operating energy efficiency all over the year. Operating measurement,operating simulation,operating energy efficiency and economic performance have been researched and analyzed.Gradient Utilization of Geothermal Space Heating of Beijing University of Technology and Fan coil + fresh air are included in this central air conditioning system. Firstly, operating measurement and the selection of key parameters were introduced, which provide the reference of central air conditioning system measurement. Secondly, according to the measurement of winter and summer from 2006 to 2007, the operating characteristics of central air conditioning system in University building are concluded. Thirdly, operating simulation was carried out based on the operating results, the comparison between measurement data and simulation data is also made. Forthly, Heating Seasonal Performance Factor of system (HSPF)sys,system energy efficiency per day (HSPF)sys.d and system energy efficiency per hour (HSFP)sys.h were concluded according to measurement. Seasonal Energy Effective Ratio of system (SEER)sys was also concluded according to measurement and simulation. Suggestion of establishing standard of central air conditioning system (cooling) was also suggested. The economic index will be improved by amending these systems. Finally, the improving of amending this system was suggested, which provide reference of high effect of operating. In the thesis, the measurement methods and measurement standard of central air conditioning operating system were concluded, combination of theoretical plan and practice was also concluded, which provide advice of amending central air conditioning system and establish energy efficiency standard.