Answer to Question #349099 in Thermal Power Engineering for kahabi

Question

1.   A turbine is supplied with steam at 40 bar, 400^oC, which expands through the turbine in steady flow to an exit pressure of 0.2 bar, and dryness fraction of

0.93. The inlet velocity is negligible, but the steam leaves at high velocity through a duct of 0.14m² cross-sectional area. If the mass flow is 3 kg/s, and the mechanical efficiency is 90%, calculate the power output of the turbine. Show the process is irreversible and calculate the change of entropy. Heat losses from the turbine are negligible. Sketch TS diagram.