Steam enters a turbine at 9 MPa, 600°C, Steam and 60 m/s and leaves at 20 kPa and 90 m/s with a moisture content of 5 percent. The turbine is not adequately insulated, and it estimated that heat is lost from the 9 MPa 600°C, 60 m/s turbine at a rate of 220 kW. The power output of the turbine is 4.5 MW. Assuming the surroundings to be at 25°C, determine Turbine a) the reversible power output of the turbine, b) the exergy destroyed within the turbine, c) the second-law efficiency of the turbine, 20 kPa d) Also, estimate the possible increase in the power output of the turbine if 90 m/s ineulet 005

Steam enters a turbine at 9 MPa, 600°C, Steam and 60 m/s and leaves at 20 kPa and 90 m/s with a moisture content of 5 percent. The turbine is not adequately insulated, and it estimated that heat is lost from the 9 MPa 600°C, 60 m/s turbine at a rate of 220 kW. The power output of the turbine is 4.5 MW. Assuming the surroundings to be at 25°C, determine Turbine a) the reversible power output of the turbine, b) the exergy destroyed within the turbine, c) the second-law efficiency of the turbine, 20 kPa d) Also, estimate the possible increase in the power output of the turbine if 90 m/s ineulet 005

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

Steam enters a turbine at 9 MPa, 600°C,
and 60 m/s and leaves at 20 kPa and 90
m/s with a moisture content of 5 percent.
The turbine is not adequately insulated,
and it estimated that heat is lost from the
Steam
9 MPa
600°C, 60 m/s
turbine at a rate of 220 kW. The power
output of the turbine is 4.5 MW. Assuming
the surroundings to be at 25°C, determine
Turbine
a) the reversible power output of the
turbine,
b) the exergy destroyed within the
turbine,
c) the second-law efficiency of the
turbine,
d) Also, estimate the possible increase
in the power output of the turbine if
the turbine were perfectly insulated.
20 kPa
90 m/s
x = 0.95

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