An air conditioner using refrigerant-134a as the working fluid and operating on the ideal vapor-compression refrigeration cycle is to maintain the cold space at 20°C while operating its condenser at 1.2 MPa. Determine the (a) COP of the system when a temperature difference of 2°C is allowed between the evaporator and condenser. If the refrigerant leaves the compressor at 73°C at a rate of 4.85 kg/min, determine (b) the rate of heat rejection to the environment, in kW (c) the isentropic efficiency of the compressor, in % and (d) the compressor's power requirement, in kW. Disregard any heat loss in the expansion valve and compressor as well as the change in potential and kinetic energy of the refrigerant in any part of the cycle.

An air conditioner using refrigerant-134a as the working fluid and operating on the ideal vapor-compression refrigeration cycle is to maintain the cold space at 20°C while operating its condenser at 1.2 MPa. Determine the (a) COP of the system when a temperature difference of 2°C is allowed between the evaporator and condenser. If the refrigerant leaves the compressor at 73°C at a rate of 4.85 kg/min, determine (b) the rate of heat rejection to the environment, in kW (c) the isentropic efficiency of the compressor, in % and (d) the compressor's power requirement, in kW. Disregard any heat loss in the expansion valve and compressor as well as the change in potential and kinetic energy of the refrigerant in any part of the cycle.

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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Mechanisms of heat transfer

Heat transfer is an essential discipline in thermal engineering that deals with the transfer, conversion, usability, and creation of heat or thermal energy. Transfer of heat occurs through various mechanisms like conduction, convection, radiation, and change of phases. All these mechanisms have distinct characteristics, but these mechanisms can simultaneously occur in an identical system.

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PLEASE ANSWER THEM ALL ASAP COZ I NEED THEM ASAP PLEASE. THANK YOU. >>>Thermodynamics

An air conditioner using refrigerant-134a as the working fluid and operating on the ideal vapor-compression
refrigeration cycle is to maintain the cold space at 20°C while operating its condenser at 1.2 MPa. Determine
the (a) COP of the system when a temperature difference of 2°C is allowed between the evaporator and
condenser. If the refrigerant leaves the compressor at 73°C at a rate of 4.85 kg/min, determine (b) the rate of
heat rejection to the environment, in kW (c) the isentropic efficiency of the compressor, in % and (d) the
compressor's power requirement, in kW. Disregard any heat loss in the expansion valve and compressor as
well as the change in potential and kinetic energy of the refrigerant in any part of the cycle.
Final Answers:

Science that deals with the amount of energy transferred from one equilibrium state to another equilibrium state.

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