Abstract:
This research aims for finding appropriate period of cleaning split type air conditioning (AC). Most of AC efficiency reduces because of dirt that is around evaporator and condenser coil surface areas. It affects the overall efficiency of AC to reduce. So cleansing AC will increase its efficiency for a specific level. Increasing efficiency will depend on how often you clean AC. From the study and data collection of AC with cooling capacity of 3.6 kW within 6 months period, the first AC is cleaned once and collected data monthly for 6 times without cleaning to find the decreasing efficiency. The second AC is cleaned monthly and collected data monthly for 6 months period to correct the electric power due to the variation of outside air temperature. The independent variables that effect the efficiency are room temperature, outside air temperature, cooling load and AC dirty. The appropriate period for cleaning AC is determined by using the lowest expense which consists of cleaning cost and energy cost due to decreasing of efficiency. From analysis, decreasing rate of the AC efficiency is 3.01 % per month and the optimal period for cleaning split type AC is every 3 months.