Refrigerant-134a enters the compressor of a refrigerator at 100 kPa and -20C at a rate of 0.5 m3/min and leaves at 0.8 MPa. The isentropic efficiency of the compressor is 78 percent. The refrigerant enters the throttling valve at 0.75 MPa and 268C and leaves the evaporator as saturated vapor at -26C. Show the cycle on a T-s diagram with respect to saturation lines, and determine (a) the power input to the compressor, (b) the rate of heat removal from the refrigerated space, and (c) the pressure drop and rate of heat gain in the line between the evaporator and the compressor.

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Refrigerant-134a enters the compressor of a refrigerator
at 100 kPa and -20C at a rate of 0.5 m3/min and
leaves at 0.8 MPa. The isentropic efficiency of the compressor
is 78 percent. The refrigerant enters the throttling valve
at 0.75 MPa and 268C and leaves the evaporator as saturated
vapor at -26C. Show the cycle on a T-s diagram with respect
to saturation lines, and determine (a) the power input to the
compressor, (b) the rate of heat removal from the refrigerated
space, and (c) the pressure drop and rate of heat gain in the
line between the evaporator and the compressor.

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