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 225C. During a test run, the pressure at the turbine inlet is 1,000 kPa, the exhaust steam at 10 kPa has a quality of 0.90, the steam flow rate is 1.7 kg/s, and the power output is 680 kW.

a. What is the temperature of the steam (in C) entering the turbine?

b. What is the specific entropy (in kJ/kg-K) of the steam entering the turbine?

c. What are the heat losses (in kW) from the turbine?

d. What is the efficiency (in %) of the turbine?