Example 16.1:Steady flow feedwater heater,Steady State (SS) b Find:Determine mz,m,and the velocity V2. A2=25cm2 T1=200C T2=40C P1=7 bar rin =40 kg/s Solution: (AV)3 0.06m3/s P2=7 bar m3= (1.108×10-3m3/kg) =54.15kg/s 3 个 Control volume boundary Saturated liquid P3 =7bar,@sat.liq.>Table A-5 P3 7 bar (AV)3=0.06m3/s =∑m一∑m: dt 0 given dm dt m1+m2一m3 ? m2=m3-m1=54.15-40=14.15kg/s 上游充通大 March 28,2018 8 SHANGHAI JIAO TONG UNIVERSITYMarch 28, 2018 8 Example 16.1: Steady flow feedwater heater, Steady State (SS) Find: Determine , , and the velocity V2 . m2 m3 Solution: ? p3 =7bar, @sat. liq.  Table A-5 given