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A Rankine cycle includes reheat and regeneration. The cycle operates with water as the working fluid between a high-pressure turbine inlet at 15 MPa and 600°C, and a condenser at 10 kPa. The cycle includes one reheater, which reheats the steam to 550°C after partial expansion to 1 MPa, and one feedwater heater (open-type) that operates at 0.5 MPa.