An air-conditioner with refrigerant-134a as the working fluid is used to keep a room at 26°℃ 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 vapor at a rate of 100 L/min and leaves at 1200 kPa and 50°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 26°℃ 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 vapor at a rate of 100 L/min and leaves at 1200 kPa and 50°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.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

An air-conditioner with refrigerant-134a 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 vapor at a rate of 100
L/min and leaves at 1200 kPa and 50°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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