8-63 Steam enters an adiabatic turbine at 6 MPa, 600°C,
and 80 m/s and leaves at 50 kPa, 100°C, and 140 m/s. If the
power output of the turbine is 5 MW, determine (a) the
reversible power output and (b) the second-law efficiency of
the turbine. Assume the surroundings to be at 25°C.
Answers: (a) 5.84 MW, (b) 85.6 percent
80 m/s
6 MPa
600°C
STEAM
50 kPa
100°C
140 m/s
5 MW
