Steam enters a turbine at a pressure of 16 MPa, temperature of 560°C, speed of 150 m/s, and a height of 3.5 m above ground. At the turbine exit, temperature is 45°C, the steam is saturated with 95% quality, the speed is 15 m/s, and the height is 0.8 m. The mass flow rate of steam is 2.5 kg/s.
(a) Calculate the power output of the turbine.
(b) Calculate the contributions of enthalpy change, kinetic energy change and potential energy change to the turbine’s power output, as percentages of power output. Based on your results, comment on the relative importance of each effect.
(c) Neglecting kinetic and potential energy effects, calculate the isentropic efficiency of the turbine.