Mixing rin =270 kg/h Solution rotor Constant liquid level Tank Boundary Energy balance: .=Q-w+ih,-h)） Cooling coil d im,=im2→mcv=const.. in =270 kg/h dT +uniform du dr (c-specific heat) dT dt d心 Water incompressible Only f(T) dt dt dt dT mec dt T=T Enthalpy term: h1-h2=c(T1-T2)+v(p∠p2)→ =c(T,-T) r=Q-Wv+mc(T-T刀） mevc d 1©2）-（色） How?Initial state t=0,T=T 上游充通大学 Mar/29,Wed,2017 14 SHANGHAI JIAO TONG UNIVERSITYMar/29, Wed, 2017 14 Solution Energy balance: 1 2 CV m m m    const. +uniform Water incompressible Only f(T) (c- specific heat) Enthalpy term: T2=T How?  Initial state t=0, T=T1