ONLY DO OPTION IV

5.2 A steam power plant operates on the Rankine cycle with reheat, using the specified condi- tions below. Using stream numbering from Fig. 5.3 on page 203, for each of the options below, determine (a) The work output of each turbine per kg of steam; (b) The work input of the feedwater pump per kg of circulated water; (c) The flowrate of steam required; (d) The heat input required in the boiler/superheater and reheater; (e) The thermal efficiency. Option T3(C) P3(MPa) P4(MPa) T(C) P.(MPa) nturbines npump Plant Capacity 80 MW i 450 5 0.4 400 0.01 0.8 0.75 ii 400 5 0.6 450 0.01 0.8 0.75 80 MW iii 400 4 0.5 500 0.01 0.9 0.95 75 MW 80 MW iv 500 4 0.8 500 0.01 0.85 0.8 600 4 1.2 600 0.01 0.85 0.8 80 MW 3 5 8 3 Boiler/ Superheater 2 T I 8 41 Pump Reheater 4 7 66 Condenser II S 7 6 Figure 5.3 Rankine cycle with reheat