17. There are developed 25,000 kW by a reheat-regenera- tive engine (turbogenerator) which receives steam at 4.2 MPa, 205C and exhaust at 0.007 MPa. At 1.90 MPa and 215C, part of the steam is extracted for feedwater heating and the remainder is withdrawn for reheating. The reheated steam enters the turbine at 1.8 MPa and 270C and expands to 1.38 MPa, where more steam is extracted for feedwater heating and the remainder expands to the condenser pressure of 0.007 MPa and an actual quality of 90%. Feedwater leaves the last heater at a temperature of 207C. The generator has an efficiency of 95%. For the ideal engine, find (a) the percent- ages of the extracted steam, (b) W, and (c) e. Let the actual extracted steam be 85% of those for the ideal engine and for the actual engine, find (d) the total throttle flow, if the break work equal the fluid work, (e) e, and (f) n, Ans. (a) 0.035, 0.234; (b) 833 kJ/kg; (c) 37.2% (e) e,, and (f) n. (d) 147,000 kg/h; (e) 27.5%; (f) 73.6%