23 September 2011

DEVELOPMENT OF ENERGY PERFORMANCE COMPARISON METHOD FOR RESIDENTIAL ELECTRIC APPLIANCES – APPLICATION TO AIR CONDITIONERS


An investigation was carried out on a simple and easy measurement laboratory set-up to compare the energy performance of a non-inverter air-conditioner (AC) and that of an inverter one having the same rated capacity of 12000 BTU/hr. Under part load ratios of 45%, 70%, and 95% and outside-inside temperature differences of from 1K to 7K, it was found that the inverter AC can save 9.3% to 26.9% of electricity consumption over the noninverter one. It also showed that the use of inverter AC instead of non-inverter AC is most effective in reducing energy consumption at a part load ratio of 70%. The coefficient of performance (COP) of the inverter AC and non-inverter AC was found in the range of from 3.4 to 6.3 and from 3.0 to 4.9, respectively. This work has shown a potentially suitable use of the developed set-up to demonstrate the energy performance of other modern electrical appliances that would be used in developing countries to reduce energy consumption and CO2 emissions.