Abstract
Generally, the annual performance factor (APF) of a packaged air conditioner (PAC) is determined in accordancewith Japanese Industrial Standards (JIS). The JIS-based performance rating method is easy and useful, but it doesnot take into account the intermittent driven mode of the compressor. Using the experimental results for thepurposes of calculation, we found a substantial difference between the APF determined using the JIS-based methodand the APF determined using the experimental results, which takes into account the intermittent driven mode.Further, several new rating methods were suggested and compared with each other. The proposed method will yielda more accurate APF as compared to the JIS-based method.Leakage of refrigerants from air conditioning systems has been an issue of great concern. Recently, the refrigerantleakage ratio was changed to 3% per year on the basis of statistical data. The APFs obtained from both theexperimental results and the JIS-based method were used to calculate the equivalent CO2 emission for R 410A. Inaddition, the APF was calculated for the same equivalent CO2 emission assuming a new refrigerant with low GWP.
