Question 3 A vapour compression refrigerator using R134a works between temperature limits of -5 °C and 40 °C. The refrigerant leaves the compressor dry saturated. (a) Discuss which factors must be considered when selecting an appropriate refrigerant? (b) Calculate the refrigeration effect and the coefficient of performance if: (i) The refrigerant leaves the condenser saturated. (ii) The refrigerant is subcooled to 20 °C before entering the throttle valve.

Question 3 A vapour compression refrigerator using R134a works between temperature limits of -5 °C and 40 °C. The refrigerant leaves the compressor dry saturated. (a) Discuss which factors must be considered when selecting an appropriate refrigerant? (b) Calculate the refrigeration effect and the coefficient of performance if: (i) The refrigerant leaves the condenser saturated. (ii) The refrigerant is subcooled to 20 °C before entering the throttle valve.

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

Chapter22: Condensers

Section: Chapter Questions

Problem 7RQ: When a standard-efficiency air-cooled condenser is used, the condensing refrigerant will normally be...

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