• To control the power output of an isentropic steam turbine, a throttle valve is installed in the steam line feeding the turbine inlet as shown in the figure. Steam at 6 MPa and 400 ºC is supplied to the throttle valve inlet and the turbine exhaust pressure is set to 70 kPa. Calculate the work produced by this steam turbine in kJ/kg separately when the throttle valve is fully open (to avoid pressure loss) and when it is partially closed so that the pressure at the turbine inlet is 3 MPa. Compare your results.