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Steam leaves the boiler of a 100 MW Rankine cycle power plant at 400°C and 3.5MPa....

Steam leaves the boiler of a 100 MW Rankine cycle power plant at 400°C and 3.5MPa. 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%.

a) Draw and label the T-s diagram for this cycle

b) Determine the cycle’s thermal efficiency

c) Determine the mass flow rate of the steam in the boiler (kg/h)

d) Determine the back-work ratio

e) Determine the minimum required cooling water flow rate if regulations limit the cooling water temperature rise to 10°C (kg/h)

Engineering   Mechanical-Engineering   
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