An air-conditioner with refrigerant 134-a as the working fluid is used to keep a room at 26°C by rejecting the waste hea
Posted: Fri Jul 08, 2022 5:48 am
An air-conditioner with refrigerant 134-a as the working fluid is used to keep a room at 26°C by rejecting the waste heat to the outdoor air at 34°C. The room gains heat through the walls and the windows at a rate of 250 kJ/min while the heat generated by the computer, TV and lights amounts to 900 W. The refrigerant enters the compressor at 500 kPa as a saturated vapour at a rate of 100 L/min and leaves at 1200 kPa and 50°C. Determine the (a) actual COP, (b) maximum COP and (c) minimum volume flow rate of the refrigerant at the compressor inlet for the same compressor inlet and exit conditions.