Answer Happy

Question 1 P2 = 3450 kPa T2 = 430 °C m2 - 3 kg/s 3 Boiler 2 4 W out Qout 1 Turbine Process heater Pump Win 5 P6 = 3450 kPa Saturated liquid P5 = 70 kPa 6 Condenser Pressure reducing valve 7 8 P8 = 70 kPa Saturated liquid Figure 1 Cogeneration system A cogeneration system is shown in Figure 1. Use the attached h-s diagram in Figure 2 to answer the followings a Plot state 2, 3, 4 & 5 on Figure 2 (5 marks-C4) b. Calculate the maximum rate of heat output Gout at the process heater in kW (7.5 marks-C4) c. Calculate the rate of maximum net work output Wnet out in kW (7.5 marks-C4) (Note: You need to plot the points on Figure 2 to qualify for points for part (b) and (c))

5,4 6 .......... 7 ............... 8 السلسلمسلسل مسلسسلسسلسل سلعه Diagramme de Mollier de la vapeur d'eau 4200 4200 Unités : s en kj.kg.K! h en kj.kg-2 v en m?kg-1 T en °C Pen bar | 750 4000 4000 700 650 600 550 soo 3500 3500 450 T-400 300 3000 3000 200 150 109 0,05 02 2500 2500 10 0.95 2 -1° h 0.90 05 A 07 91.-7.19 OS -0.85 Qe--- 1992 0.01 w 2000 5,4 2000 9 CBP 6 8 $ 7 Figure 2