subject (thermo 2)pls show full steps with clear handwritingpls answer me in 20 mins sir CondenserHigh pressureExpansioncompressorvalveFlashchamberLow pressurecompressorExpansionvalveEvaporatorFigure Q4(b) (b)Consider a two-stage cascade refrigeration cycle with a flash chamber as shown in Figure Q4(b) with refrigerant R-134a as the workingfluid. The evaporator temperature is -10°C and the condenser pressure is 1600 kPa. The refrigerant leaves the condenser as a saturated liquid and isthrottled to a flash chamber operating at 0.45 MPa. Part of the refrigerant evaporates during the flashing process, and this vapour is mixed with therefrigerant leaving the low-pressure compressor. The mixture is then compressed to the condenser pressure by the high-pressure compressor. The liquidin the flash chamber is throttled to the evaporator pressure and cools the refrigerated space as it vaporizes in the evaporator. The mass flow rate of therefrigerant through the low-pressure compressor is 0.11 kg/s. Assuming the refrigerant leaves the evaporator as a saturated vapor and the isentropicefficiency is 86% for both compressors, determine;i. the mass flow rate of the refrigerant through the high-pressure compressor;ii. the rate of refrigeration supplied by the system;iii. the COP of this refrigerator; andiv. the rate of refrigeration and the COP if this refrigerator operated on a single-stage vapor compression cycle between the same evaporatingtemperature and condenser pressure with the same compressor efficiency and the same flow rate as calculated in part (i).

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Answered: Condenser High pressure Expansion valve…

Condenser High pressure Expansion valve compressor Flsh chamber Low pressure compressor Expansion valve Evaporator Figure Q4(b)

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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Consider a two-stage compression refrigeration system operating between the pressure limits of 0.8 and 0.14 MPa(see Fig. Q 2). The working fluid is refrigerant -134a . The refrigerant leaves the condenser as a saturated liquid and is throttled to a flash chamber operating at 0.4 MPa. Part of the refrigerant evaporates during this flashing process, and this vapour is mixed with the refrigerant leaving the low-pressure compressor. The mixture is then compressed to the condenser pressure by the high-pressure compressor. The liquid in the flash chamber is throttled to the evaporator pressure,and it cools the refrigerated space as it vaporizes in the evaporator. Assuming the refrigerant leavesthe evaporator as saturated vapor and both compressors are isentropic, determine(a) the fraction of the refrigerant that evaporates as it is throttled to the flash chamber,(b) the amount of heat removed from the refrigerated space and the compressor work per unit massof refrigerant flowing through the…
In an ideal vapour-compression refrigeration cycle, refrigerant R-12 enters the compressor as a saturated vapour at −18 degree C and leaves the condenser as a saturated liquid at 25 degree C. The mass flow rate of the refrigerant is 0.5 kg/s, and the pressure drop in the evaporator and the condenser are negligible. Calculate: a) the refrigeration effect (rate of refrigeration or heat transfer rate in the evaporator) b)power consumed by the compressor c)the coefficient of performance of the refrigerator) d)qualityof the refrigerant after the expansion valve e)heat transfer rate in the condenser
Consider a two-stage compression refrigeration system operating between the pressure limits of 1.2 MPa and 0.16 MPa. The working fluid is refrigerant-134a. The refrigerant leaves the condenser as a saturated liquid and is throttled to a flash chamber operating at 0.7 MPa. Part of the refrigerant evaporates and the remainder is mixed with the refrigerant leaving the low-pressure compressor. The mixture is then compressed to the condenser pressure by the high-pressure compressor. The liquid in the flash chamber is throttled to the evaporator pressure, and it cools the refrigerated space as It vaporizes in the evaporator. Assume that the refrigerant leaves the evaporator as saturated vapor and both compressors are isentropic. a) i) Determine the amount of heat removed from the refrigerated space ii) Determine the compressor work per unit mass of refrigerant flowing through the condenser b) Determine the coefficient of performance
Consider a two-stage compression refrigeration system operating between the pressure limits of 1.2 MPa and 0.16 MPa. The working fluid is refrigerant-134a. The refrigerant leaves the condenser as a saturated liquid and is throttled to a flash chamber operating at 0.7 MPa. Part of the refrigerant evaporates and the remainder is mixed with the refrigerant leaving the low-pressure compressor. The mixture is then compressed to the condenser pressure by the high-pressure compressor. The liquid in the flash chamber is throttled to the evaporator pressure, and it cools the refrigerated space as It vaporizes in the evaporator. Assume that the refrigerant leaves the evaporator as saturated vapor and both compressors are isentropic. a) Draw the 'T-S' Diagram and state the assumptions b) Determine the fraction of the refrigerant that evaporates as it is throttled to the flash chamber (x_e).
A two-stage compression refrigeration system operates with refrigerant-134a between the pressure limits of 1.4 MPa and 0.10 MPa. The refrigerant leaves the condenser as a saturated liquid and is throttled to a flash chamber operating at 0.6 MPa. he flash chamber is maintained at the same pressure as the low pressure discharge which is 0.6 Mpa. The vapor in the flash chamber is then compressed to the condenser pressure by the high-pressure compressor, and the liquid is throttled to the evaporator pressure. Assume the refrigerant leaves the evaporator as saturated vapor and both compressors are isentropic. Consider a mass flow rate of 0.19 kg/s through the condenser. (Take the required values from saturated refrigerant-134a tables.) Determine the fraction of the refrigerant that evaporates as it is throttled to the flash chamber. (You must provide an answer before moving to the next part.) The fraction of the refrigerant that evaporates as it is throttled to the flash chamber is…
A two-stage compression refrigeration system operates with refrigerant-134a between the pressure limits of 1.4 MPa and 0.10 MPa. The refrigerant leaves the condenser as a saturated liquid and is throttled to a flash chamber operating at 0.6 MPa. he flash chamber is maintained at the same pressure as the low pressure discharge which is 0.6 Mpa. The vapor in the flash chamber is then compressed to the condenser pressure by the high-pressure compressor, and the liquid is throttled to the evaporator pressure. Assume the refrigerant leaves the evaporator as saturated vapor and both compressors are isentropic. Consider a mass flow rate of 0.19 kg/s through the condenser. (Take the required values from saturated refrigerant-134a tables.) Determine the coefficient of performance. The coefficient of performance is ______.