Abstract:
This paper reports an experimental investigation of the performance split air conditioner
(AC) with and without combined coil (trombone coil condenser) as heat pump water
heater. The coil is a heat exchanger that is placed between the compressor and the
condenser (main condenser) by utilizing the heat rejection. The coil is placed in an
insulated water storage tank with a capacity of 50L. Data are captured every 5 minutes
during the 120 minutes of testing, where the room temperature is maintained at
temperatures of 20oC, 23oC and 27oC with variation of the cooling load at 1000W, 2000W
and 3000W respectively.The results indicated that the use of coil increases the
performance of air conditioner as an cooling air in room and water heater in reclamation
tank simultaneously. The use of coil causes a slight increase in compressor power 0.014
kW (2%), where the COP increases around 12% higher than the increase in compressor
power percentage, which is used as a water heater. Condenser temperature and room
temperature with coil slightly rise compared to without coil at the cooling load increase.
The finding indicates that the addition of the coil generates free hot water with
temperature range around 61.54oC-64.33oC.The application of AC combined with water
heater using coil does not affect the cooling performance but it can improve the energy
performance considerably for cooling and energy saving for heating water
