Summary of Solution Method Typical scenario for using E-NTU method Given: Th in, Tcin, h, mc, hX geometry Find h out Icout, q Solution method: 1. Determine UA for this heat exchanger 1. Find u and A 2. Find C.Clc 2. Calculate NTU=UA/C 3. Determine s from tabulated formulas or plots 4. Compute actual heat transfer g=8 q max mIn 5. Find outlet temperatures from T.+ q p,c Heat Transfer Su Yongkang School of Mechanical EngineeringHeat Transfer Su Yongkang School of Mechanical Engineering # 9 Summary of Solution Method • Typical scenario for using -NTU method: Given: Find: Solution method: 1. Determine UA for this heat exchanger 1. Find 2. Find 2. Calculate 3. Determine  from tabulated formulas or plots 4. Compute actual heat transfer 5. Find outlet temperatures from Th,in , Tc,in , m  h , m  c , HX geometry Th,out , Tc,out , q ( ) q qmax Cmin Th,i Tc,i =  =  − m q , and m q c , , , h , , , p c c o c i p h h o h i c T T c T T   = + = − Cc Ch Cr , , U and A min NTU =UA/C