The temperatures and pressures shown in the table were measured for a vapor-compression refrigerator that uses R-134a

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The temperatures and pressures shown in the table were measured for a vapor-compression refrigerator that uses R-134a as the refrigerant.image


The refrigerator operates between a cold region at TC and a hot region at TH. The positive-displacement compressor (piston-cylinder device) has a cylindervolume and operating speed such that it processes 1m3/min of R-134a at the inlet of the compressor.


A. Determine the minimum value of TC and the maximum value of TH.


B. Determine the coefficient of performance.


C. Determine the heat-transfer rate from the region at TC.

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Related Book For  book-img-for-question

Thermodynamics Concepts And Applications

ISBN: 9781107179714

2nd Edition

Authors: Stephen R. Turns, Laura L. Pauley

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