열전달 5판 솔루션 Introduction to the Heat Transfer 5th ed Incropera
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열전달 5판 솔루션 Introduction to the Heat Transfer 5th ed Incropera
열전달 5판 솔루션 Introduction to the Heat Transfer 5th ed Incropera
열전달 5판 解法(해법) Introduction to the Heat Transfer 5th ed Incropera
PROBLEM 1.1 KNOWN: Heat rate, q, through one-dimensional wall of area A, thickness L, thermal
conductivity k and inner temperature, T1. FIND: The outer temperature of the wall, T2. SCHEMATIC:
ASSUMPTIONS: (1) One-dimensional conduction in the x-direction, (2) Steady-state conditions, (3) Constant properties. ANALYSIS: The rate equation for conduction through the wall is given by Fourier’s law,
q cond = q x = q ′′ ? A = -k x
Solving for T2 gives
T ?T dT ? A = kA 1 2 . dx L
T2 = T1 ?
q cond L . kA
Substituting numerical values, find
T2 = 415 C -
3000W × 0.025m 0.2W / m ? K × 10m2
T2 = 415 C - 37.5 C T2 = 378 C.
COMMENTS: Note direction of heat flow and fac…(skip)
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