A smaller power plant produces 25 kg/s steam at 3 MPa, 600◦C in the boiler. It cools the condenser to an exit temperature of 45◦C, and the cycle is shown in Fig. P9.82. An extraction is done at 500 kPa to an open FWH; in addition, a steam supply of 5 kg/s is taken out and not returned. The missing 5 kg/s water is added to the FWH from a 20◦C, 500 kPa source. Find the extraction flow rate needed to cover both the FWH and the steam supply. Find the total turbine power output.

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Boiler T1 T2 P2 Water resupply 8 FWH 6 -7 Steam supply 1 P1 Condenser FIGURE P9.82 3.