Analysis of heat transfer Total heat transfer rate is found through energy balance, regardless of the hX type or flow path hot in hot. our old. out q For hot fluid - Energy balance ut ric, ricn(t+dT) m, p, hTh=m, Cp,h(/+dT)h+dqn Define h ph P h(Heat capacity rate for hot fluid) For the cold fluid d a=c dt (Note: no minus sign"- in this equation since heat flow in Heat Transfer Su Yongkang School of Mechanical EngineeringHeat Transfer Su Yongkang School of Mechanical Engineering # 10 Analysis of heat transfer • Total heat transfer rate is found through energy balance, regardless of the HX type or flow path For hot fluid: Energy balance: • Define For the cold fluid: (Note: no minus sign “-” in this equation, since heat flow in) ( ) h h p h h h p h h h p h h h i n out dq m c dT m c T m c T dT dq E E , , ,      = − = + + = Thot,in Tcold ,in Thot,out Tcold ,out q m  c pT dq mc (T dT)  p + (Heat capacity rate for hot fluid) dqc = Cc dTc dqh = −Ch dTh h p h Ch m  c , =