Refrigerant-134a enters the compressor of a refrig- erator 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 compres- sor is 78 percent. The refrigerant enters the throttling valve at 0.75 MPa and 26°C and leaves the evaporator as saturated vapor at -26°C. 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.
Refrigerant-134a enters the compressor of a refrig- erator 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 compres- sor is 78 percent. The refrigerant enters the throttling valve at 0.75 MPa and 26°C and leaves the evaporator as saturated vapor at -26°C. 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.
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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show PH diagram and include also the solution of the interpolation
Transcribed Image Text:Refrigerant-134a enters the compressor of a refrig-
erator 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 compres-
sor is 78 percent. The refrigerant enters the throttling valve
at 0.75 MPa and 26°C and leaves the evaporator as saturated
vapor at -26°C. 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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