Water vapor enters a steam turbine with an isentropic efficiency of 80% at a flow rate of 3 kg/s, a pressure of 8 MPa and a temperature of 500 C, and expands to a pressure of 30 kPa. Neglecting the kinetic energy and potential energy changes of the steam,

calculate:

a) Turbine power and (25p)

b) The entropy change in the turbine (25p).

Water vapor enters a steam turbine with an isentropic efficiency of 80% at a flow rate of 3kg/s, a pressure of 8MPa and a temperature of 500C, and expands to a pressure of 30kPa. Neglecting the kinetic energy and potential energy changes of the steam, a) Turbine power and (25p) b) Calculate the entropy change in the turbine (25p)