13. A 10,000 kW turbo-generator operating at rated capac- ity receives 52,000 kg/h of steam at...

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13. A 10,000 kW turbo-generator operating at rated capac- ity receives 52,000 kg/h of steam at 2.90 MPa and 310°C, exhaust is aat 0.007 MPa. At 1.20 MPa and 230°C, there are actually extracted 20% of throttle flow for regenerative heat- ing of feedwater. The generator efficiency is 95%. For an ideal engine, find (a) the quantity of steam extracted, kg/h (b) W and (c) e. For the actual engine, find (d) the temperature of feedwater from the open heater, (e) n, and (f) the approximate enthalpy of exhaust steam and its quality. Ans. (a) 12,428 kg/ h; (b) 787.3 kJAkg, (c) 35.48%, (d) 167.5°C, (e) 87.9%, (f) 2143.8 kJ/kg, 82.2% 13. A 10,000 kW turbo-generator operating at rated capac- ity receives 52,000 kg/h of steam at 2.90 MPa and 310°C, exhaust is aat 0.007 MPa. At 1.20 MPa and 230°C, there are actually extracted 20% of throttle flow for regenerative heat- ing of feedwater. The generator efficiency is 95%. For an ideal engine, find (a) the quantity of steam extracted, kg/h (b) W and (c) e. For the actual engine, find (d) the temperature of feedwater from the open heater, (e) n, and (f) the approximate enthalpy of exhaust steam and its quality. Ans. (a) 12,428 kg/ h; (b) 787.3 kJAkg, (c) 35.48%, (d) 167.5°C, (e) 87.9%, (f) 2143.8 kJ/kg, 82.2%