Skip to Main Content
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
Fins and Heat Sinks 157
The heat sink efficiency is
ηη
t
ff
t
f
NA
A
=− −=
×
111
64 0 00029
0 0217
1
2
2
()
.
.
(
m
m
00 974 0 978.).,=
and the heat sink convection-radiation thermal resistance is
R
hA
hs cr
tt
,
..
.==
××
=
11
0 978 25 0 0217
188
2
η W/Cm
2
°°C/W.
The conduction thermal resistance through the heat sink base is
R
t
kWH
hs b
b
,
.
..
.==
××
=
0 004
390 006006
000
m
W/Cmm
228°C/W.
The spreading thermal resistance is calculated using the correlation given in
Section 5.7 and the effective heat transfer coefficient:
h
RA
hs cr hsb
eff
o
C/Wmm
==
××
=
11
188006 006
147
,
...
.88W/m °C.
2
r
A
r
A
c
s
1
2
2
2
0 0113== =
==
×
ππ
ππ
0.0004m
m
0.06 0.06 m
.
== 0 0338.m
ε
τ
== =
==
r
r
t
r
b
1
2
2
0 0113
0 0338
0 334
0 004
00
.
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

Heat Transfer Engineering

Heat Transfer Engineering

C. Balaji, Balaji Srinivasan, Sateesh Gedupudi
Heat and Mass Transfer, 2nd Edition

Heat and Mass Transfer, 2nd Edition

R. Rudramoorthy, K. Mayilswamy
Heat Transfer: Theory and Problems

Heat Transfer: Theory and Problems

R. Rudramoorthy, K. Mayilsamy

Publisher Resources

ISBN: 9781439814680