is used to superheat the vapor entering the compressor while subcooling the liquid leaving the condenser. The system uses R-134a. The evaporator operates at 15oF and the condenser operates at 100 psia. The heat exchanger provides 40oF of subcooling at the throttle valve entrance. a) Calculate the entropy generation at the throttle for the simple refrigeration cycle. Calculate also the entropy generation of the universe (throttle + surroundings) due to this operation. b) Calculate the process efficiency of the heat exchanger for the refrigeration cycle that includes the heat exchanger

is used to superheat the vapor entering the compressor while subcooling the liquid leaving the condenser. The system uses R-134a. The evaporator operates at 15oF and the condenser operates at 100 psia. The heat exchanger provides 40oF of subcooling at the throttle valve entrance. a) Calculate the entropy generation at the throttle for the simple refrigeration cycle. Calculate also the entropy generation of the universe (throttle + surroundings) due to this operation. b) Calculate the process efficiency of the heat exchanger for the refrigeration cycle that includes the heat exchanger

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

Chapter23: Compressors

Section: Chapter Questions

Problem 9RQ: Describe the reciprocating compressor piston, rod, crank-shaft, valves, valve plate, head, shaft...

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