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Heat Transfer
book

Heat Transfer

by Younes Shabany
December 2009
Intermediate to advanced content levelIntermediate to advanced
523 pages
18h 30m
English
CRC Press
Content preview from Heat Transfer
67
5
Thermal Resistance
Network
5.1 THERMAL RESISTANCE CONCEPT
Consider an electrical resistor shown in Figure 5.1. If there is a potential difference
between the two ends of this resistor, a current will ow through it. The direction of
this current is from the high potential to the low potential ends of this resistor, and
its magnitude is given by the Ohm’s law;
I
VV
R
=
12
.
(5.1)
Now, consider a layer with thickness L and surface area A as shown in Figure 5.2.
If there is a temperature difference across this layer (i.e.,
TT
12
0−≠),
there will be
conduction heat transfer from its high temperature side to its low temperature side.
Fourier’s law t
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Publisher Resources

ISBN: 9781439814680