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Question 2: Saturated liquid water at 20kPa enters an adiabatic pump and discharges at 5 MPa with h2=240 kJ/kg. The water flowrate is 480 kg/s. (a) Draw the system and what are the inlet and outlet temperatures? (b) Write general entropy balance for the pump and calculate entropy generation (kJ/K.s) for the process. (c) Write energy balance for the system and calculate power required by the pump in hp.

Question 2: Saturated liquid water at 20kPa enters an adiabatic pump and discharges at 5 MPa with h2=240 kJ/kg. The water flowrate is 480 kg/s. (a) Draw the system and what are the inlet and outlet temperatures? (b) Write general entropy balance for the pump and calculate entropy generation (kJ/K.s) for the process. (c) Write energy balance for the system and calculate power required by the pump in hp.

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
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Question 2: Saturated liquid water at 20kPa enters an adiabatic pump and discharges at 5 MPa with h2=240 kJ/kg. The water flowrate is 480 kg/s. (a) Draw the system and what are the inlet and outlet temperatures? (b) Write general entropy balance for the pump and calculate entropy generation (kJ/K.s) for the process. (c) Write energy balance for the system and calculate power required by the pump in hp. (d) Explain whether the work produced in part (c) is an actual or ideal work. (e) Draw this process on a Ts and hs diagrams. (f) What is the pump's isentropic efficiency?
Transcribed Image Text:Question 2: Saturated liquid water at 20kPa enters an adiabatic pump and discharges at 5 MPa with h2=240 kJ/kg. The water flowrate is 480 kg/s. (a) Draw the system and what are the inlet and outlet temperatures? (b) Write general entropy balance for the pump and calculate entropy generation (kJ/K.s) for the process. (c) Write energy balance for the system and calculate power required by the pump in hp. (d) Explain whether the work produced in part (c) is an actual or ideal work. (e) Draw this process on a Ts and hs diagrams. (f) What is the pump's isentropic efficiency?
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