Answered: The Siemans SST-400 GEO steam turbine…

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

The Siemans SST-400 GEO steam turbine is employed in the cycle shown above. Operational information is are shown in the table. you can assume the turbine is adiabatic and you can ignore the KE & PE terms. you can assume that the pump operation is isentropic. the surrounding temperature is 25°C

based on the table information:

a.Calculate the mass flow of steam [96.5kg/s]

b.Find the isentropic efficiency of the turbine [0.836]

c.What is the rate of entropy generated (kW/K) in the turbine? [28.26kW/K]

d.Calculate the thermal efficiency of the power plant [0.199]

Technical Data
Power output
50 MW
Frequency
50 or 60 Hz
Inlet steam
15 bar(a)/250 °c
Exit steam
0.4 bar(a) / 90% vapor quality
Pump inlet
Saturated liquid

qin
Boiler
3
Wpump,in
Wturb,out
Pump
Turbine
4
Condenser
'4out

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