Steam enters an adiabatic turbine at 8 MPa and 520 °C with a volumetric flow rate of 0.8 m3/s, and exits at 30 kPa. The turbine isentropic efficiency is 90%. Determine the specific entropy of the steam at the turbine exit.
Determine the rate of entropy generation of the steam inside the turbine. List a potential cause of the entropy generation.