Steam enters a turbine at 12 MPa, 550°C, and 60 m/s and leaves at 20 kPa and

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Steam enters a turbine at 12 MPa, 550°C, and 60 m/s and leaves at 20 kPa and 130 m/s with a moisture content of 5 percent. The turbine is not adequately insulated and it estimated that heat is lost from the turbine at a rate of 150 kW. The power output of the turbine is 2.5 MW. Assuming the surroundings to be at 25°C, determine
(a) The reversible power output of the turbine,
(b) The energy destroyed within the turbine, and
(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.

Steam enters a turbine at 12 MPa, 550°C
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Thermodynamics An Engineering Approach

ISBN: 9781259822674

9th Edition

Authors: Yunus Cengel, Michael Boles, Mehmet Kanoglu

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