Solution Valve -Control volume boundary Steam at V= 15 bar. Turbine 320°C 0.6m3 1 inlet 1 exit CV(dash line): Initially evacuated tank Mass rate balance: dmcv dt =m; dues =-Wev h dt dmev dt Energy rate balance: dUes We+rinh dt Tank initially evacuated: △Uy=-Wv+h:△mev 1-initial,2-final -0d}g (15bar,320°C) △mv=1n2- @ V 0.6m3 m2= 2.96kg 02 (0.203m3/kg)←--------- (5bar,400C Table A-6 Wcw=2.96kg(3081.9-2951.3)kJ/kg=386.6kJ 上游究通大学 Mar/29,Wed,2017 12 SHANGHAI JIAO TONG UNIVERSITYMar/29, Wed, 2017 12 Solution 1 inlet 1 exit CV (dash line): Mass rate balance: Energy rate balance: Tank initially evacuated: 1- initial, 2-final (15bar, 320˚C) (5bar, 400˚C) Table A-6