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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
Heat Conduction Equation 189
Conduction heat transfer rate to the left and right sides of this wall are
cond,1cond

QQ kA
dT
dx
kA
TT
L
g
x
== =
+
=
()0
0
21
22k
L
QQLkA
dT
dx
k
xL
==−=
=
,
()

cond,2cond
AA
TT
L
g
k
L
21
2
.
(8.49)
Note that

QQ gALG
cond,1cond,2
+==
is the total heat generated inside this wall.
Next, let’s consider the same thin plane wall with convection boundary conditions
on both sides as shown in Figure 8.12. The steady-state heat conduction equation and
the boundary conditions for this case are
dT
dx
g
k
k
dT
dx
h
x
2
2
0
0+=
=
=
,Boundary Conditions:
111
22
0(())
(())
,
,
TT
k
dT
dx
hTLT
xL
−=
=
(8.50)
h
1
T
, 1
T
, 2
h
2
x
L0
g
Q
cond, 2
Q
cond, 1
FIGURE 8. ...
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Publisher Resources

ISBN: 9781439814680