(c) Evaluate and compare the coefficients of performance IL COPR = СОPR Win – Wout Win

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter9: Heat Transfer With Phase Change

Section: Chapter Questions

Problem 9.28P

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Question

**** PART C ONLY In a standard ideal refrigeration cycle (Fig. 1), the refrigerant 134a enters adiabatically isolated expansion valve as a saturated liquid at a pressure P1 = 1 MPa and leaves the device at a pressure P2 = 100kPa. Then the refrigerant enters the evaporator, where it changes into the saturated vapor. Subsequently, the vapor is compressed in an isentropic compressor to the pressure 1MPa and condensed in the condenser back to the initial saturated-liquid state. USE IMAGE BELOW FOR PART C

(c) Evaluate and compare the coefficients of performance
СОPR
СОPR
Win – wout
Win
of the standard ideal refrigeration cycle and the cycle with the turbine.

TA
Saturated
liquid
Win
100k Pa
3
2'
Saturated vapor

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