Steam enters the first-stage turbine at 40 bar and 500 °C with a mass flow rate of 17.36 k9. Steam exits the turbine at 20 bar and 400 °C. The steam is then reheated at constant pressure to 500 °C before entering the second-stage turbine. Steam leaves the second-stage turbine at 0.6 bar. For operation at steady state, and ignoring stray heat transfer and kinetic and potential energy effects, sketch a T - s diagram of processes 1-4 and determine: (a) The entropy generated in the first-stage turbine [0.64 kW /K] (b) The isentropic efficiency of the first-stage turbine [89%] (c) The exit temperature of the turbine 2 if its isentropic efficiency is 77, = 0.85 [130 °C] (d) The entropy production in the reheater if the average boundary temperature is 600 °C [0.91 kW/K] Steam + P = 40 bar T = 500°C (AV), = 90 m³/min P4= 0.6 bar Power Turbine Turbine P2 = 20 bar T = 400°C P3 = 20 bar T3 = 500°C Reheater 2 Qreheater

Steam enters the first-stage turbine at 40 bar and 500 °C with a mass flow rate of 17.36 k9. Steam exits the turbine at 20 bar and 400 °C. The steam is then reheated at constant pressure to 500 °C before entering the second-stage turbine. Steam leaves the second-stage turbine at 0.6 bar. For operation at steady state, and ignoring stray heat transfer and kinetic and potential energy effects, sketch a T - s diagram of processes 1-4 and determine: (a) The entropy generated in the first-stage turbine [0.64 kW /K] (b) The isentropic efficiency of the first-stage turbine [89%] (c) The exit temperature of the turbine 2 if its isentropic efficiency is 77, = 0.85 [130 °C] (d) The entropy production in the reheater if the average boundary temperature is 600 °C [0.91 kW/K] Steam + P = 40 bar T = 500°C (AV), = 90 m³/min P4= 0.6 bar Power Turbine Turbine P2 = 20 bar T = 400°C P3 = 20 bar T3 = 500°C Reheater 2 Qreheater

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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Question

100%

Steam enters the first-stage turbine at 40 bar and 500 °C with a mass flow rate of 17.36 k9. Steam
exits the turbine at 20 bar and 400 °C. The steam is then reheated at constant pressure to 500 °C
before entering the second-stage turbine. Steam leaves the second-stage turbine at 0.6 bar. For
operation at steady state, and ignoring stray heat transfer and kinetic and potential energy effects, sketch
a T – s diagram of processes 1-4 and determine:
(a) The entropy generated in the first-stage turbine [0.64 kW/K]
(b) The isentropic efficiency of the first-stage turbine [89%]
(c) The exit temperature of the turbine 2 if its isentropic efficiency is nT, = 0.85 [130 °C]
(d) The entropy production in the reheater if the average boundary temperature is 600 °C
[0.91 kW /K]
Steam +
P = 40 bar
T = 500°C
(AV), = 90 m³/min
P4= 0.6 bar
Power
Turbine
Turbine
P2 = 20 bar
T = 400°C
Reheater
P = 20 bar
T3 = 500°C
2
Qreheater

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Please explain each step
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