A commercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -35°C by rejecting waste heat to cooling water that enters the condenser at 18°C at a rate of 0.35 kg/s and leaves at 26°C. The refrigerant enters the condenser at 1.2 MPa and 50°C and leaves at the same pressure subcooled by 5°C. The compressor consumes 3.3 kW of power. Use data from the tables. 26°C 1.2 MPa 5°C subcooled Expansion valve ↑ Condenser Water 18°C Evaporator PL 1.2 MPa 50°C Compressor Determine the minimum power input to the compressor for the same refrigeration load. The minimum power input to the compressor for the same refrigeration load is kW.

A commercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -35°C by rejecting waste heat to cooling water that enters the condenser at 18°C at a rate of 0.35 kg/s and leaves at 26°C. The refrigerant enters the condenser at 1.2 MPa and 50°C and leaves at the same pressure subcooled by 5°C. The compressor consumes 3.3 kW of power. Use data from the tables. 26°C 1.2 MPa 5°C subcooled Expansion valve ↑ Condenser Water 18°C Evaporator PL 1.2 MPa 50°C Compressor Determine the minimum power input to the compressor for the same refrigeration load. The minimum power input to the compressor for the same refrigeration load is kW.

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

A commercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -35°C by
rejecting waste heat to cooling water that enters the condenser at 18°C at a rate of 0.35 kg/s and leaves at 26°C. The
refrigerant enters the condenser at 1.2 MPa and 50°C and leaves at the same pressure subcooled by 5°C. The compressor
consumes 3.3 kW of power. Use data from the tables.
26°C
1.2 MPa
5°C subcooled
Expansion
valve
Condenser
Evaporator
ė
Water
18°C
1.2 MPa
50°C
Compressor
in
Determine the minimum power input to the compressor for the same refrigeration load.
The minimum power input to the compressor for the same refrigeration load is
KW.
K

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