Question

A commercial refrigerator using R-134a as a refrigerant is used to keep the cooled environment at -35°C. The refrigerator releases the waste heat to the cooling water that enters the condenser at 18°C with a flow of 0.25 kg/s and leaves the condenser at 26°C. The refrigerant enters the condenser at a pressure of 1.2 MPa and a temperature of 50°C, and leaves the condenser at the same pressure and supercooled at 5°C. Since the compressor consumes 3.3 kW of power, a) Mass flow rate of the refrigerant, b) Cooling load and COP value c) Calculate the minimum power consumed by the compressor for the same cooling load.

Name: a commercial refrigerator using r 134a as a refrigerant is used to keep the cooled environment at 35c the refrigerator releases the waste heat to the cooling water that enters the condenser 59904
Uploaded: 2022-11-22T07:49:51-08:00
Duration: 4 min 35 s
Channel: Adi S
Description: a commercial refrigerator using r 134a as a refrigerant is used to keep the cooled environment at 35c the refrigerator releases the waste heat to the cooling water that enters the condenser 59904

          A commercial refrigerator using R-134a as a refrigerant is used to keep the cooled environment at -35°C. The refrigerator releases the waste heat to the cooling water that enters the condenser at 18°C with a flow of 0.25 kg/s and leaves the condenser at 26°C. The refrigerant enters the condenser at a pressure of 1.2 MPa and a temperature of 50°C, and leaves the condenser at the same pressure and supercooled at 5°C. Since the compressor consumes 3.3 kW of power,
a) Mass flow rate of the refrigerant,
b) Cooling load and COP value
c) Calculate the minimum power consumed by the compressor for the same cooling load.

Added by Phillip J.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Adi S

11/22/2022

Step 1

25 \times (26 - 18) / (200.78 - 110.0) \] \[ \dot{m}_{ref} = 0.05 \, \text{kg/s} \] Show more…

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A commercial refrigerator using R-134a as a refrigerant is used to keep the cooled environment at -35°C. The refrigerator releases the waste heat to the cooling water that enters the condenser at 18°C with a flow of 0.25 kg/s and leaves the condenser at 26°C. The refrigerant enters the condenser at a pressure of 1.2 MPa and a temperature of 50°C, and leaves the condenser at the same pressure and supercooled at 5°C. Since the compressor consumes 3.3 kW of power, a) Mass flow rate of the refrigerant, b) Cooling load and COP value c) Calculate the minimum power consumed by the compressor for the same cooling load.