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Air flows steadily at a rate of 0.5 kg/s through an air compressor. It enters the compressor at a velocity of 6 m/s with a pressure of 1 bar and specific volume of 0.85 m'/kg and leaves at a velocity of 5 m/s with a pressure of 7 bar and specific volume of 0.16 m/kg. The internal energy of the air leaving is 90 kJ/kg greater than that of air entering (u-u = 90 kJ/kg). Cooling water in a jacket surrounding the cylinder absorbs heat from the air at a rate of 60 kJ/s. Answer the following; a. What are the main assumptions b. Calculate the power required to drive the compressor, in kJ/kg c. Calculate the inlet and outlet cross-sectional areas? Air in Air out Qout Air compressor

Air flows steadily at a rate of 0.5 kg/s through an air compressor. It enters the compressor at a velocity of 6 m/s with a pressure of 1 bar and specific volume of 0.85 m'/kg and leaves at a velocity of 5 m/s with a pressure of 7 bar and specific volume of 0.16 m/kg. The internal energy of the air leaving is 90 kJ/kg greater than that of air entering (u-u = 90 kJ/kg). Cooling water in a jacket surrounding the cylinder absorbs heat from the air at a rate of 60 kJ/s. Answer the following; a. What are the main assumptions b. Calculate the power required to drive the compressor, in kJ/kg c. Calculate the inlet and outlet cross-sectional areas? Air in Air out Qout Air compressor

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Air flows steadily at a rate of 0.5 kg/s through an air compressor. It enters the compressor at a velocity of 6 m/s with a pressure of 1 bar and specific volume of 0.85 m/kg and leaves at a velocity of 5 m/s with a pressure of 7 bar and specific volume of 0.16 m/kg. The internal energy of the air leaving is 90 kJ/kg greater than that of air entering (u-u = 90 kJ/kg). Cooling water in a jacket surrounding the cylinder absorbs heat from the air at a rate of 60 kJ/s. Answer the following; a. What are the main assumptions! b. Calculate the power required to drive the compressor, in kJ/kg c. Calculate the inlet and outlet cross-sectional areas? Air in Air out Qout Air compressor W = ? dmes = m, - m, dt conservation of mass dE conservation of Energy : Qey - Wey + mu, + pv, + dt + gz - m u, + pv. + + gz %3D
Transcribed Image Text:Air flows steadily at a rate of 0.5 kg/s through an air compressor. It enters the compressor at a velocity of 6 m/s with a pressure of 1 bar and specific volume of 0.85 m/kg and leaves at a velocity of 5 m/s with a pressure of 7 bar and specific volume of 0.16 m/kg. The internal energy of the air leaving is 90 kJ/kg greater than that of air entering (u-u = 90 kJ/kg). Cooling water in a jacket surrounding the cylinder absorbs heat from the air at a rate of 60 kJ/s. Answer the following; a. What are the main assumptions! b. Calculate the power required to drive the compressor, in kJ/kg c. Calculate the inlet and outlet cross-sectional areas? Air in Air out Qout Air compressor W = ? dmes = m, - m, dt conservation of mass dE conservation of Energy : Qey - Wey + mu, + pv, + dt + gz - m u, + pv. + + gz %3D
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