Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN: 9780190698614
Author: Sadiku, Matthew N. O.
Publisher: Oxford University Press
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Question
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Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.14 MPa and -10oC at rate of 0.05 kg/sec and leave at 0.8 MPa and 50oC. The refrigerant is cooled in the condenser to 26oC and 0.72MPa and is throttled to 0.15MPa. Determine (a) the rate of heat removal from the refrigerated space and the power input to the compressor, (b) the isentropic efficiency of the compressor and (c) the coefficient of performance.
Expert Solution
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Step 1

Given data as per question

Refrigerant-134a enters the compressor

Pressure and temperature of refrigerant at inlet of compressor, P1=0.14 MPa , T1=-10°C

Mass flow rate of refrigerant , m˙=0.05 kg/s

Pressure and temperature of refrigerant at outlet of compressor, P2=0.8 MPa, T2=50°C

Pressure and temperature of refrigerant at condenser, P3=0.72 MPa, T3=26°C

Throttled Pressure, P=0.15 MPa

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