Enthalpy, kJ/kg 2. An insulated steam nozzle operates between Pi = 2 MPa and 350C and Pe = 1 MPa. During the process the entropy of the steam increases by 0.5 kJ/kg K. a) Calculate the efficiency of the nozzle using the Mollier diagram. (You will lose points for using A-2,3,5) b) Label the inlet, ideal exit, and actual exit states. c) Specify the actual and ideal exit temperatures. Entropy, kJ/kg.K 6.5 7.0 7.5 8.0 8.5 9.0 9.5 10 3700 3700 50 18 3600 3500 3400 3300 3200 3100 3000 2900 2800 2700 2600 2500 2400 2300 Saturation line NOTO 0.86 3600 550C 3500 500C 3400 450C 3300 400C 350C 3200 300C 3100 250C+ 3000 200C 100C 2900 2800 810 2700 80C 5 6 60C 40C 2600 20C 0.98 0.943 x=0.96 0.92 2400 2500 6 0.90 8000 00 2200 00 4.5 5.0 5.5 6.0 6.5 7.0 7.5 2200 Entropy, kJ/kgK 0.001 8.5 2300 Enthalpy, kJ/kg