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Superheated steam enters a turbine at 7 MPa, 550°C, and exits at 150kPa. a) Draw the system. b) If the process is reversible adiabatic (isentropic), find the final temperature (T2s), the final enthalpy (h2s) of the steam, and do the energy balance to calculate the turbine work (Wts). c) Using entropy balance, show that Sgen for the above process is 0.

Superheated steam enters a turbine at 7 MPa, 550°C, and exits at 150kPa. a) Draw the system. b) If the process is reversible adiabatic (isentropic), find the final temperature (T2s), the final enthalpy (h2s) of the steam, and do the energy balance to calculate the turbine work (Wts). c) Using entropy balance, show that Sgen for the above process is 0.

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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Thermodynamics
Question 1: Superheated steam enters a turbine at 7 MPa, 550°C, and exits at 150kPa. a) Draw the system. b) If the process is reversible adiabatic (isentropic), find the final temperature (T25), the final enthalpy (h2s) of the steam, and do the energy balance to calculate the turbine work (Wts). c) Using entropy balance, show that Sgen for the above process is 0. d) If the isentropic efficiency is 85%, find the actual final temperature (T2a) and calculate Sgen? e) Plot process (b) and (d) on a Ts diagram with proper labelling.
Transcribed Image Text:Question 1: Superheated steam enters a turbine at 7 MPa, 550°C, and exits at 150kPa. a) Draw the system. b) If the process is reversible adiabatic (isentropic), find the final temperature (T25), the final enthalpy (h2s) of the steam, and do the energy balance to calculate the turbine work (Wts). c) Using entropy balance, show that Sgen for the above process is 0. d) If the isentropic efficiency is 85%, find the actual final temperature (T2a) and calculate Sgen? e) Plot process (b) and (d) on a Ts diagram with proper labelling.
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