Problem 3. Steam enters an adiabatic turbine at 8 MPa and 780 K with a mass flow rate of 3 kg/s and leaves at 30kPa. The isentropic efficient of the turbine is 0.90. Neglecting the kinetic energy change of the steam, determine the temperature at the turbine exit and the power output of the turbine. Sketch the process on a T-s figures that includes the vapor dome and the constant pressure lines at the inflow and outflow pressures. (Answer: 3080kW)

Fig: 1

Fig: 2