Refrigerant 134a enters the compressor of a refrigerator at 100 kPa and -20 ° C 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 throttle valve at 0.75 MPa and 26 ° C and leaves the evaporator as saturated vapor at -26 ° C. Show the cycle on a Ts and Ph diagram with respect to the 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 gain. heat in the line between the evaporator and the compressor.
Refrigerant 134a enters the compressor of a refrigerator at 100 kPa and -20 ° C 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 throttle valve at 0.75 MPa and 26 ° C and leaves the evaporator as saturated vapor at -26 ° C. Show the cycle on a Ts and Ph diagram with respect to the 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 gain. heat 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 -20 ° C 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 throttle valve at 0.75 MPa and 26 ° C and leaves the evaporator as saturated vapor at -26 ° C. Show the cycle on a Ts and Ph diagram with respect to the 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 gain. heat in the line between the evaporator and the compressor.
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