3- A refrigeration system using R-134a has a three evaporators of capacities of 5, 10 and 15 TR respectively. The temperature to be maintained in the evaporators is 5, 0 and -12 °C respectively. Each evaporator is fitted with an expansion valve. The condenser pressure is to be 9 bar. The exit condition from evaporator is dry saturated vapour and liquid is sub cooled by 5 °C in the condenser. Determine 1-the refrigeration effect 2- rate of flow of the refrigerant in kg/s and 3-the theoretical horse power required.

3- A refrigeration system using R-134a has a three evaporators of capacities of 5, 10 and 15 TR respectively. The temperature to be maintained in the evaporators is 5, 0 and -12 °C respectively. Each evaporator is fitted with an expansion valve. The condenser pressure is to be 9 bar. The exit condition from evaporator is dry saturated vapour and liquid is sub cooled by 5 °C in the condenser. Determine 1-the refrigeration effect 2- rate of flow of the refrigerant in kg/s and 3-the theoretical horse power required.

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter47: High-pressure, Low-pressure, And Absorption Chilled-water Systems

Section: Chapter Questions

Problem 13RQ: The subcooling temperature in a condenser can be measured by taking the difference between the A....

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