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A steam power plant operates on a regenerative Rankine cycle. Steam enters the turbine at 6...

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Mechanical Engineering

A steam power plant operates on a regenerative Rankine cycle.Steam enters the turbine at 6 MPa at 700 ºC and the condenser at 10kPa. Turbine has isentropic efficiency of 85% and pumps haveisentropic efficiency of 90%. Steam is extracted from the turbineat 0.6 MPa to heat the feedwater in an open feedwater heater. Waterleaves the open feedwater heater as saturated liquid.

a) Draw the system with labels and show the ideal and thenon-ideal cycle on a T-s diagram with complete labels. )

b) Determine the fraction of steam extracted forregeneration.

) c) Calculate the heat duty for boiler and condenser. If thenet power output of the power cycle is 200 MW, determine the flowrate of the steam through the boiler. )

d) Determine the thermal efficiency of the cycle.

e) How regenerative Rankine cycle can improve the efficiency ofa power cycle?)

f) Explain the differences between Carnot Cycle and Rankinecycle. Why Rankine Cycle is more practical than Carnot Cycle?

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