**Problem 9.86**A refrigeration cycle runs with R-134a having a low pressure of 200 kPa and a high pressure of 1000 kPa. It cools a cold space at -5°C with a rate of 750 W and the whole system sits in a 27°C room. Find the COP for the cycle and specify all the entropy generation terms by location and rates.*Explanation or diagrams are not provided in the image.*

Given:T1=27°C =300 KT2=-5°C =268 KQ=750 W

Answered: .86 A refrigeration cycle runs with…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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A Carnot engine has 2 kg of air as the working fluid. Heat is supplied to the air at 1000oC and rejected by the air at 400 oC. At the beginning of the heat addition process, the pressure is 0.9 MPa and during heat addition the volume double. Calculate the net cycle work assuming air is an ideal gas with constant specific heats. Calculate the amount of work done in the isentropic expansion process. Calculate the entropy change during the heat rejection process.
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.86 A refrigeration cycle runs with R-134a having low pressure of 200 kPa and high pressure of 1000 kPa. It cools a cold space at -5°C with a rate of 750 W and the whole system sits in a 27°C room. Find the COP for the cycle and specify all the entropy gen- eration terms by location and rates.