fdtou-curs-09 - Cadre Didactice
fdtou-curs-09 - Cadre Didactice
fdtou-curs-09 - Cadre Didactice
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2/14/2003<br />
Transfer termic prin pereţi<br />
q<br />
q<br />
1<br />
2<br />
cilindrici compuşi<br />
=<br />
=<br />
s1<br />
s2<br />
2<br />
2<br />
2<br />
1<br />
ln<br />
ln<br />
( T − T ) 1 2<br />
( r2<br />
r ) 1<br />
( T 2 2 − T ) 3<br />
( r r )<br />
.......... .......... .......... .........<br />
q<br />
n<br />
=<br />
Q<br />
l<br />
Q<br />
l<br />
Q<br />
l<br />
sn<br />
=<br />
=<br />
=<br />
πλ<br />
πλ<br />
πλ<br />
n−<br />
ln<br />
( T − T )<br />
1 n−1<br />
n<br />
( r r )<br />
n−1<br />
LUCIAN GAVRILĂ – Fenomene de transfer II<br />
3<br />
n<br />
2<br />
(79)<br />
42
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