R134a enters the condenser of a residential heat pump at 850 kPa and 70°C at a rate of 0.020 kg/s and leaves at 750 kPa and 2°C. The refrigerant enters the compressor at 180 kPa and 8.0°C. Determine (a) the isentropic efficiency of the compressor (in %), (b) the rate of heat supplied to the heated room (in kW) and (c) the COP of the heat pump. Disregard any heat loss in the expansion valve and compressor as well as the change in potential and kinetic energy of the refrigerant in any part of the cycle.
R134a enters the condenser of a residential heat pump at 850 kPa and 70°C at a rate of 0.020 kg/s and leaves at 750 kPa and 2°C. The refrigerant enters the compressor at 180 kPa and 8.0°C. Determine (a) the isentropic efficiency of the compressor (in %), (b) the rate of heat supplied to the heated room (in kW) and (c) the COP of the heat pump. Disregard any heat loss in the expansion valve and compressor as well as the change in potential and kinetic energy of the refrigerant in any part of the cycle.
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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R134a enters the condenser of a residential heat pump at 850 kPa and 70°C at a rate of 0.020 kg/s and leaves at 750 kPa and 2°C. The refrigerant enters the compressor at 180 kPa and 8.0°C. Determine (a) the isentropic efficiency of the compressor (in %), (b) the rate of heat supplied to the heated room (in kW) and (c) the COP of the heat pump. Disregard any heat loss in the expansion valve and compressor as well as the change in potential and kinetic energy of the refrigerant in any part of the cycle.
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