The steam rate to a turbine for variable output is controlled by a throttle valve in the inlet line. Steam is supplied to the throttle valve at 1.700 kPa and 225oC. During a test run, the pressure at the turbine inlet is 1,000 kPa, the exhaust steam at 10 kPa has a quality of 0.95, the steam flow rate is 0.5 kg s-1, and the power output of the turbine is 180 kW.
(a) What are the heat losses from the turbine?
(b) What would be the power output if the steam supplied to the throttle valve were expanded iscntropically to the final pressure?