As you know, power production is a very important process in our society. Superheated steam at 40 bar absolute and at a temperature of 500°C flows at a rate of 250 kg/min to an adiabatic turbine, where the steam expands to 5 bar pressure. The turbine power production is 1500 kW. The exit steam from the turbine flows to a heater, where it is re-heated isobarically to its initial temperature. (a) Determine the outlet steam temperature from the turbine. Make sure to write the appropriate energy balance. (b) Determine the required heat input (kW) to the heater using an energy balance. (c) Check that overall energy balance is satisfied (turbine + heater).

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
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As you know, power production is a very important process in our society. Superheated steam at 40 bar absolute and at a temperature of 500°C flows at a rate of 250 kg/min to an adiabatic turbine, where the steam expands to 5 bar pressure. The turbine power production is 1500 kW. The exit steam from the turbine flows to a heater, where it is re-heated isobarically to its initial temperature.


(a) Determine the outlet steam temperature from the turbine. Make sure to write the appropriate energy balance.


(b) Determine the required heat input (kW) to the heater using an energy balance.


(c) Check that overall energy balance is satisfied (turbine + heater).

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