A regenerative Rankine cycle operates with inlet conditions of 800°C and 5MPa and exhausts to a...

A regenerative Rankine cycle operates with inlet conditions of 800°C and 5MPa and exhausts to a pressure of 10kPa. A single open-feedwater heater is used with an extraction pressure of 0.8 MPa. Assume the exit states of the condenser and the feedwater heater are both saturated liquids. The turbine and pump isentropic efficiencies are 100%.

Draw the T-s diagram and determine the thermal efficiency for the cycle and the total turbine work per unit boiler mass flow rate (kJ/kg)
Repeat the problem in part 1, but replace the open feed water heater with a closed feed water heater where the extracted steam is pumped to the boiler pressure before being combined with the condenser feed water
Repeat the problem in part 2, but where the extracted steam is throttled from the closed feed water heater exit to the condenser

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samet mamat answered 1 year ago

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