3. A refrigerator uses refrigerant-134a as the working fluid and operates on the ideal vapor- compression refrigeration cycle except for the compression process. The refrigerant enters the evaporator at 120 kPa with a quality of 34 percent and leaves the compressor at 70°C. If the compressor consumes 450 W of power, determine (a) the mass flow rate of the refrigerant, (b) the condenser pressure, and (c) the COP of the refrigerator. Answers: (a) 0.00644 kg/s, (b) 800 kPa, (c) 2.03 |↓ Condenser Expansion valve 120 kPa x=0.34 Evaporator M Warm environment 70°C Compressor Cold environment
3. A refrigerator uses refrigerant-134a as the working fluid and operates on the ideal vapor- compression refrigeration cycle except for the compression process. The refrigerant enters the evaporator at 120 kPa with a quality of 34 percent and leaves the compressor at 70°C. If the compressor consumes 450 W of power, determine (a) the mass flow rate of the refrigerant, (b) the condenser pressure, and (c) the COP of the refrigerator. Answers: (a) 0.00644 kg/s, (b) 800 kPa, (c) 2.03 |↓ Condenser Expansion valve 120 kPa x=0.34 Evaporator M Warm environment 70°C Compressor Cold environment
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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Transcribed Image Text:3. A refrigerator uses refrigerant-134a as the working fluid and operates on the ideal vapor-
compression refrigeration cycle except for the compression process. The refrigerant enters
the evaporator at 120 kPa with a quality of 34 percent and leaves the compressor at 70°C. If
the compressor consumes 450 W of power, determine (a) the mass flow rate of the
refrigerant, (b) the condenser pressure, and (c) the COP of the refrigerator. Answers: (a)
0.00644 kg/s, (b) 800 kPa, (c) 2.03
|↓
Condenser
Expansion
valve
120 kPa
x=0.34
Evaporator
M
Warm
environment
70°C
Compressor
Cold
environment
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