R-134a enters a compressor operating at steady state at 200 kPa. At this state, 2% of the mass is in the liquid phase. R-134a then exits at a pressure of 1600 kPa. If the exit temperature is 70°C, determine the (a) isentropic compressor efficiency in %, (b) the work input in kJ/kg of refrigerant flowing and the (c) change in the entropy of the refrigerant, in kJ/kg-K Heat transfer between the compressor and its surroundings as well as the kinetic and potential energy effects can be ignored.
R-134a enters a compressor operating at steady state at 200 kPa. At this state, 2% of the mass is in the liquid phase. R-134a then exits at a pressure of 1600 kPa. If the exit temperature is 70°C, determine the (a) isentropic compressor efficiency in %, (b) the work input in kJ/kg of refrigerant flowing and the (c) change in the entropy of the refrigerant, in kJ/kg-K Heat transfer between the compressor and its surroundings as well as the kinetic and potential energy effects can be ignored.
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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R-134a enters a compressor operating at steady state at 200 kPa. At this state, 2% of the mass is in the liquid phase. R-134a then exits at a pressure of 1600 kPa. If the exit temperature is 70°C, determine the (a) isentropic compressor efficiency in %, (b) the work input in kJ/kg of refrigerant flowing and the (c) change in the entropy of the refrigerant, in kJ/kg-K Heat transfer between the compressor and its surroundings as well as the kinetic and potential energy effects can be ignored.
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