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(a) The condenser operates at 1.6 MPa and the evaporator at -6°C. If an adiabatic, reversible expansion device was available and used to expand the liquid leaving the condenser, (i) Calculate the COP improve by using this device instead of the throttle device. (ii)Illustrate a T-s diagram that represents the ideal vapor-compression refrigeration cycle described in (a)

(a) The condenser operates at 1.6 MPa and the evaporator at -6°C. If an adiabatic, reversible expansion device was available and used to expand the liquid leaving the condenser, (i) Calculate the COP improve by using this device instead of the throttle device. (ii)Illustrate a T-s diagram that represents the ideal vapor-compression refrigeration cycle described in (a)

Elements Of Electromagnetics
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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In an ideal vapor-compression refrigeration cycle, the refrigerant enters the compressor as a saturated vapor and is cooled to the saturated liquid state in the condenser. It is then throttled to the evaporator pressure and vaporizes as it absorbs heat from the refrigerated space. Figure Q3.1 depicts the description of this process. Warm environment QH Condenser Expansion valve Compressor Evaporator Cold refrigerated space Figure Q3.1: Ideal vapor-compression refrigeration cycle. Assuming a refrigerator operates on this principle and uses refrigerant-134a as the working fluid, answer the following questions. (a) The condenser operates at 1.6 MPa and the evaporator at -6°C. If an adiabatic, reversible expansion device was available and used to expand the liquid leaving the condenser, (i) Calculate the COP improve by using this device instead of the throttle device. (ii)Illustrate a T-s diagram that represents the ideal vapor-compression refrigeration cycle described in (a)
Transcribed Image Text:In an ideal vapor-compression refrigeration cycle, the refrigerant enters the compressor as a saturated vapor and is cooled to the saturated liquid state in the condenser. It is then throttled to the evaporator pressure and vaporizes as it absorbs heat from the refrigerated space. Figure Q3.1 depicts the description of this process. Warm environment QH Condenser Expansion valve Compressor Evaporator Cold refrigerated space Figure Q3.1: Ideal vapor-compression refrigeration cycle. Assuming a refrigerator operates on this principle and uses refrigerant-134a as the working fluid, answer the following questions. (a) The condenser operates at 1.6 MPa and the evaporator at -6°C. If an adiabatic, reversible expansion device was available and used to expand the liquid leaving the condenser, (i) Calculate the COP improve by using this device instead of the throttle device. (ii)Illustrate a T-s diagram that represents the ideal vapor-compression refrigeration cycle described in (a)
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