Section: Thermodynamics | Type: NAT | Marks: 2
Steam enters a steam turbine at 10 MPa and 600 ℃ with a mass flow rate of 16 kg/s. The steam exits the turbine as saturated vapor at 10 kPa. Under steady state condition, the turbine generates 16.2 MW power. If the ambient temperature is 25 ℃, the rate of entropy generation in the turbine is _______ kW/K (round off to 2 decimal places). Neglect the change in kinetic and potential energies of the steam, and use the following property values: Superheated steam at 10 MPa, 600 ℃ 3 0.03837 m /kg, 3241.68 kJ/kg, 3625.34 kJ/kg, 6.9028 kJ/(kg K) v u h s = = = = Saturated vapour at 10 kPa 3 14.67355 m /kg, 2437.89 kJ/kg, 2584.63 kJ/kg, 8.1501 kJ/(kg K) g g g g v u h s = = = =
Answer: 21.00 to 22.00