Steam enters a turbine operating at a steady state at 8 MPa and 700 °C. The mass flow rate of the steam is 135 kg/min. The steam exits the turbine as a saturated vapor at 18 kPa. The turbine produces 2.2 MW of power. Ignoring potential and kinetic energy effects determine the:
a. Rate of heat transfer from the turbine to the environment in kW
b. Rate of entropy production in kW/K for an enlarged control volume that includes the turbine and enough of its surroundings that the heat transfer occurs at the ambient temperature of 25 °C. Assume that the environment acts as a reservoir. What does this imply relative to the temperature?