Your boss also asks you to solve this problem: R-134a enters the condenser of a residential heat pump at 800 kPa and 55°C at a rate of 0.018 kg/s and leaves at 750 kPa subcooled by 4°C. The R-134a enters the compressor at 200kPa superheated by 4°C. Construct a T-s diagram and evaluate; (i) the isentropic efficiency of the compressor; (ii) the rate of heat supplied to the heated room; (iii) the COP of the heat pump; and

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Your boss also asks you to solve this problem: R-134a enters the condenser of a
residential heat pump at 800 kPa and 55°C at a rate of 0.018 kg/s and leaves at 750
kPa subcooled by 4°C. The R-134a enters the compressor at 200kPa superheated
by 4°C. Construct a T-s diagram and evaluate;
(i)
the isentropic efficiency of the compressor;
(ii)
the rate of heat supplied to the heated room;
(iii)
the COP of the heat pump; and
(iv)
the COP and the rate of heat supplied to the heated room if this heat pump
operated on the ideal vapour compression cycle between the pressure limits
of 200 and 800 kPa.
Transcribed Image Text:Your boss also asks you to solve this problem: R-134a enters the condenser of a residential heat pump at 800 kPa and 55°C at a rate of 0.018 kg/s and leaves at 750 kPa subcooled by 4°C. The R-134a enters the compressor at 200kPa superheated by 4°C. Construct a T-s diagram and evaluate; (i) the isentropic efficiency of the compressor; (ii) the rate of heat supplied to the heated room; (iii) the COP of the heat pump; and (iv) the COP and the rate of heat supplied to the heated room if this heat pump operated on the ideal vapour compression cycle between the pressure limits of 200 and 800 kPa.
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