Statistical analysis of design energy efficiency ratio of central air conditioning system in office buildings in Chongqing

Presents the calculation method of design energy efficiency ratio (DEER) for air conditioning system and its subsystems. Based on the investigation of thirty-six air conditioned office and similar duty buildings in Chongqing, calculates the values of DEERs for the air conditioning system in summer and winter, including the DEERs for the whole project, the cold and heat source system, the water system and the air system. Analyses the reasons for the maximum and minimum values existed in the four DEERs. Discusses mean value and deviation of the DEERs and the approach to increase the DEERs.