THE EXPERIMENTAL RESULT OF HEAT RECOVERY FROM HEAT PUMP SYSTEM FOR DOMESTIC WATER HEATING

Abstract

This paper describes an experimental study of using the waste heat from a  Carrier 42 AR Under-Ceiling split room air - conditioner had a rated capacity of 4.71Hp (12,000 Btu/h). An under – ceiling split type heat pump for heating domestic water in private homes. Energy recovery improved the performance, and the recovered energy could replace electricity completely for heating domestic water use. An extra charge of refrigerant in the air-conditioner could prevent its compressor from over heating during energy recovery. The experimental conducted on varies capacity of the range from 22.5 litres to 180 litres storage tank. Results show the water temperature increased lies in the range of 50 ^OC to 65 ^OC. It was found that, when the initial water temperature in the 22.5 litres storage tank was 27 ^OC, the water temperature reached 65 ^OC in 240 minutes. For the 180 litres of water, temperature increased from 27 ^OC  to  62 ^OC in 240 minutes.