A 25,000 kW turbo-generator is supplied with 128,000 kg/h of steam at 2.50 MPa and 400C...

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A 25,000 kW turbo-generator is supplied with 128,000 kg/h of steam at 2.50 MPa and 400°C when developing it rated load. There are actually extracted 10,400 kg h at 0.3 MPa and 8300 kg/h at 0.06 MPa. The condenser pressure is 0.007 MPa and actual feedwater temperature is 127°C. For the ideal engine find (a) various percentages of extracted steam and (b) e. For the actual engine, find (c) the various percentages of extracted steam, (d) m,, (e) e,, and (f) n. (g) Find the approxi- mate enthalpy of the exhaust if the generator efficiency if 96%. Ans. (a) 8.5%, 7,8%; (b) 37.1%, (c) 8.12%, 6.48%, (d) 5.12, (e) 26%, (f) 70.7%, (g) 2460 kJ/kg A 25,000 kW turbo-generator is supplied with 128,000 kg/h of steam at 2.50 MPa and 400°C when developing it rated load. There are actually extracted 10,400 kg h at 0.3 MPa and 8300 kg/h at 0.06 MPa. The condenser pressure is 0.007 MPa and actual feedwater temperature is 127°C. For the ideal engine find (a) various percentages of extracted steam and (b) e. For the actual engine, find (c) the various percentages of extracted steam, (d) m,, (e) e,, and (f) n. (g) Find the approxi- mate enthalpy of the exhaust if the generator efficiency if 96%. Ans. (a) 8.5%, 7,8%; (b) 37.1%, (c) 8.12%, 6.48%, (d) 5.12, (e) 26%, (f) 70.7%, (g) 2460 kJ/kg