• In a 35,000 kW turbo-generator that receives steam at 6.9 MPa and 370°C, 11% of the throttle steam is actually extracted at 2 MPa, 215°C; with the remainder being re- heated to 1.8 MPa and 315°C; then 20% of the throttle steam is actually extracted at0.724 MPa, each extraction serving an open feedwater heater. The engine exhaust to a condenser pressure of 0.005 MPa and the temperature of the feedwater from the last heater is 205°C. The combined steam rate of the turbo-generator unitn is 4.898 kg/kwh and the generator effi- ciency is 95%. For the total throttle flow to an ideal engine, find (a) extracted steam for the last heater, (b) W, (c) e. For the actual engine, find (d) e, (e) n,. (f) What is the enthalpy of the actual exhaust when the pump efficiency is 60%?
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