a b A Carnot vapor refrigeration A Carnot vapor refrigeration cycle uses R- 134a as the working fluid. The refrigerant cycle uses R- 134a as the working fluid. The refrigerant enters the condenser as enters the condenser as saturated vapor at 28°C and saturated vapor at 28°C and leaves as saturated liquid. The leaves as saturated liquid. The evaporator operates at a temperature of - 10°C. For every kg of refrigerant flow, calculate the amount of heat evaporator operates at a temperature of - 10°C. For every kg of refrigerant flow, calculate the heat rejected in absorbed in the evaporator, kJ.A the condenser, kJ. * A Carnot vapor refrigeration cycle uses R- 134a as the working fluid. The refrigerant enters the condenser as saturated vapor at 28°C and leaves as saturated liquid. The evaporator operates at a temperature of - 10°C. For every kg of refrigerant flow, calculate the work of compression. kJ.

a b A Carnot vapor refrigeration A Carnot vapor refrigeration cycle uses R- 134a as the working fluid. The refrigerant cycle uses R- 134a as the working fluid. The refrigerant enters the condenser as enters the condenser as saturated vapor at 28°C and saturated vapor at 28°C and leaves as saturated liquid. The leaves as saturated liquid. The evaporator operates at a temperature of - 10°C. For every kg of refrigerant flow, calculate the amount of heat evaporator operates at a temperature of - 10°C. For every kg of refrigerant flow, calculate the heat rejected in absorbed in the evaporator, kJ.A the condenser, kJ. * A Carnot vapor refrigeration cycle uses R- 134a as the working fluid. The refrigerant enters the condenser as saturated vapor at 28°C and leaves as saturated liquid. The evaporator operates at a temperature of - 10°C. For every kg of refrigerant flow, calculate the work of compression. kJ.

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

Chapter47: High-pressure, Low-pressure, And Absorption Chilled-water Systems

Section: Chapter Questions

Problem 13RQ: The subcooling temperature in a condenser can be measured by taking the difference between the A....

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Refrigerant 134a is the working fluid in a vapor-compression heat pump system with a heatingcapacity of 65,000 Btu/h. The condenser operates at 300 lbf/in , and the evaporator temperatureis -10°F. The refrigerant is a saturated vapor at the evaporator exit and a liquid at 120°F at thecondenser exit. Pressure drops in the flows through the evaporator and condenser are negligible.The compression process is adiabatic, and the temperature at the compressor exit is 200°F A) Determine the mass flow rate of refrigerant in lb/min B) Determine the required horsepower of the compressor. C) Determine the coefficient of performance.
A two-stage compression refrigeration system operates with refrigerant-134a betweenthe pressure limits of 1.4 and 0.10 MPa. The refrigerant leaves the condenser as asaturated liquid and is throttled to a flash chamber operating at 0.6 MPa. Therefrigerant leaving the low-pressure compressor at 0.4 MPa is also routed to the flashchamber. The vapour in the flash chamber is then compressed to the condenserpressure by the high-pressure compressor, and the liquid is throttled to the evaporatorpressure. Assuming the refrigerant leaves the evaporator as saturated vapour andboth compressors are isentropic,Determine:4.1 The fraction of the refrigerant that evaporates as it is throttled to the flashchamber4.2 The rate of heat removed from the refrigerated space for a mass flow rate of0.25 kg/s through the condenser, and4.3 The coefficient of performance.