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...
Question
![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.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F6e088488-f964-47b6-8591-fd564c98ea42%2F7e03bcb7-83b3-4930-b077-ca5a9e828c96%2Fzvute5_processed.png&w=3840&q=75)
Transcribed Image Text: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.
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