3- Consider a cogeneration power plant modified with regeneration. Steam enters the turbine at 6 MPa and 450°C and expands to a pressure of 0.4 MPa. At this pressure, 60 percent of the steam is extracted from the turbine, and the remainder expands to 10 kPa. Part of the extracted steam is used to heat the feedwater in an open feedwater heater. The rest of the extracted steam is 71 Power Plant Vapor Power Cycles used for process heating and leaves the process heater as a saturated liquid at 0.4 MPa. Determine the mass flow rate of steam through the boiler. Answers: 17.73 kg/s Turbine Boiler Process heater FWH PI Condenser

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