Steam leaves the boiler of a 100 mw rankine cycle power plant at 400 C and 3.5 MPa. The turbine has an isentropic efficiency of 85% and exhausts at 15 kPa. In the condenser, the water is subcooled to 38 C by lake water at 13 C. The pump isentropic efficiency is 75%. Part a) Draw and label the T-s diagram for this cycle
Part b) Determine the cycle’s thermal efficiency
Part c) Determine the mass flow rate of the steam in the boiler (kg/h)
Part d) Determine the back-work ratio
Part e) Determine the minimum required cooling water flow rate if regulations limit the cooling water temperature rise to 10°C (kg/h)