An air-conditioner with refrigerant-134a as the working fluid is used to keep a room at 30°C by rejecting the waste heat to the outdoor air at 50°C. The room gains heat through the walls and the windows at a rate of 350 kJ/min while the heat generated by the computer, TV, and lights amounts to 1000 W. The refrigerant enters the compressor at 400 kPa as a saturated vapor at a rate of 120 L/min and leaves at 1400 kPa and 70°C. Determine: (a) the actual COP, (b) the maximum COP, and (c) the minimum volume flow rate of the refrigerant at the compressor inlet for the same compressor inlet and exit conditions.
An air-conditioner with refrigerant-134a as the working fluid is used to keep a room at 30°C by rejecting the waste heat to the outdoor air at 50°C. The room gains heat through the walls and the windows at a rate of 350 kJ/min while the heat generated by the computer, TV, and lights amounts to 1000 W. The refrigerant enters the compressor at 400 kPa as a saturated vapor at a rate of 120 L/min and leaves at 1400 kPa and 70°C. Determine:
(a) the actual COP,
(b) the maximum COP, and
(c) the minimum volume flow rate of the refrigerant at the compressor inlet for the same compressor inlet and exit conditions.
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