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a) Flash chamber is commonly used in a multistage compression refrigeration system. Would the use of flash chamber increases or decreases the compressor work input and refrigerating effect? © @)

a) Flash chamber is commonly used in a multistage compression refrigeration system. Would the use of flash chamber increases or decreases the compressor work input and refrigerating effect? © @)

Refrigeration and Air Conditioning Technology (MindTap Course List)
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
Chapter3: Refrigeration And Refrigerants
Section: Chapter Questions
Problem 10RQ: If the evaporating pressure was 76 psig for R-22 and the compressor inlet temperature was 65F, what...
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a) 15:20 people.utm.my Flash chamber is commonly used in a multistage compression refrigeration system. Would the use of flash chamber increases or decreases the compressor work input and refrigerating effect? b) A two-stage compression refrigeration system operates between the pressure limits of 0.10 MPa and 1.0 MPa. Refrigerant134-a is used as the working fluid in the refrigeration system. The refrigerant leaves the condenser at 38°C and is throttled to a flash chamber operating at 0.60 MPa. The refrigerant leaves the low-pressure compressor at 0.60 MPa and flows to a mixing chamber, then mixed with the saturated vapour separated from the flash chamber. The vapour from the mixing chamber is then compressed to the condenser pressure by the high-pressure compressor. The saturated liquid from the flash chamber is throttled to the evaporator pressure. The mass flow rate through the condenser is 0.3 kg/s. The refrigerant leaves the evaporator at -10°C. Assume that both compression processes are isentropic. ii) iii) iv) !!!! 4G < Sketch and label the cycle on a P-h diagram. Calculate the mass flow rate of the saturated vapour leaves the flash chamber, kg/s. Determine the rate of heat removed from the refrigerated space, kW. Calculate the coefficient of performance (COP) of the refrigeration system. □
Transcribed Image Text:a) 15:20 people.utm.my Flash chamber is commonly used in a multistage compression refrigeration system. Would the use of flash chamber increases or decreases the compressor work input and refrigerating effect? b) A two-stage compression refrigeration system operates between the pressure limits of 0.10 MPa and 1.0 MPa. Refrigerant134-a is used as the working fluid in the refrigeration system. The refrigerant leaves the condenser at 38°C and is throttled to a flash chamber operating at 0.60 MPa. The refrigerant leaves the low-pressure compressor at 0.60 MPa and flows to a mixing chamber, then mixed with the saturated vapour separated from the flash chamber. The vapour from the mixing chamber is then compressed to the condenser pressure by the high-pressure compressor. The saturated liquid from the flash chamber is throttled to the evaporator pressure. The mass flow rate through the condenser is 0.3 kg/s. The refrigerant leaves the evaporator at -10°C. Assume that both compression processes are isentropic. ii) iii) iv) !!!! 4G < Sketch and label the cycle on a P-h diagram. Calculate the mass flow rate of the saturated vapour leaves the flash chamber, kg/s. Determine the rate of heat removed from the refrigerated space, kW. Calculate the coefficient of performance (COP) of the refrigeration system. □
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