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A steam turbine inlet is at 1200 kPa, 500°C. The actual exit is at 300 kPa with an actual work of 407 kJ/kg. What is its second law efficiency?

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A steam turbine inlet is at 1200 kPa, 500°C. The actual exit is at 300 kPa with an actual work of 407 kJ/kg. What is its second law efficiency? 

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The second law efficiency is the actual work out measured relative to the reversible work out, Eq.

Steam turbine To = 25°C = 298.15 K

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