Steam at 40.0 MPa, 800.°C expands through a heated nozzle to 0.100 MPa and 90.0% quality at a rate of 100. kg/h.
Neglect the inlet velocity and any change in potential energy, and take the entropy production rate to be 10.0% of the magnitude of the entropy transport rate due to heat transfer. Determine
a. The entropy production rate if the surface temperature of the nozzle is 450.°C.
b. The exit velocity.
c. The exit area of the nozzle.