Solution P:=1 MPa T,=300°C Steam Initially evacuated >m=0 and mu=0. ·One inlet,no outlet m1=0 P2=I MPa T3=? 0 个 0 0 Un0-Uo)=Q-W,+∑mh-n, (a)Flow of steam into an evacuated tank uniform (Mass energy balance) =m2u2 u2=h; Table A6 P2 1 MPa T2=456.1°C P;=1MPa u2=3051.6 kJ/kg h=3051.6kJ/kg T,=300°C >300℃？--→h=U+ -->u2x 上游充通大 April 8,2018 5 SHANGHAI JIAO TONG UNIVERSITYApril 8, 2018 5 Solution • Initially evacuated m1 = 0 and m1u1 = 0. • One inlet, no outlet 0 0 0 0 =m2u2 uniform Table A6 >300˚C u2x (Mass & energy balance) ??