A steam power plant operating on a regenerative cycle, as illustrated in Fig. 8.5, include just one feed water heater. Steam enters the turbine at 4.500 kPa and 500oC and exhausts at 20 kPa. Steam for the feed water heater is extracted from the turbine at 350 kPa and in condensing raises the temperature of the feed water to within 6oC of its condensation temperature at 350 kPa, If the turbine and pump efficiencies arc both 0,78 what is the thermal efficiency of the cycle and what fraction of the steam entering the turbine is extracted for the feed water healer?

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Bailer8800 P- 8,600 kPa 500°C Turbine P- 2.900 kPa P= 1,150 kPa P 375 kPa P 10 kPa 226 C P- 87.69 kPa 91 C 46C Condenser 231.97 186.05 141.30 96.00 45 C Feedwater heaters Pump