LUCIAN GAVRILĂ – Fenomene de transfer II - Cadre Didactice
LUCIAN GAVRILĂ – Fenomene de transfer II - Cadre Didactice
LUCIAN GAVRILĂ – Fenomene de transfer II - Cadre Didactice
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3/14/2003<br />
Transfer global <strong>de</strong> căldură la<br />
potenţial termic variabil<br />
o Integrand (230) pe întreaga suprafaţă <strong>de</strong><br />
<strong>transfer</strong> termic, expresia fluxului<br />
termic transmis <strong>de</strong> la fluidul (1) la (2):<br />
Q<br />
=<br />
−<br />
1<br />
f<br />
T<br />
1e<br />
T<br />
1i<br />
−T<br />
∫<br />
−T<br />
2e<br />
2i<br />
d<br />
o Eliminând parametrul f între ecuaţiile<br />
(233) şi (235), se obţine:<br />
( T − T ) = − ( ΔT<br />
− ΔT<br />
)<br />
1<br />
2<br />
1<br />
f<br />
<strong>LUCIAN</strong> <strong>GAVRILĂ</strong> <strong>–</strong> <strong>Fenomene</strong> <strong>de</strong> <strong>transfer</strong> <strong>II</strong> 38<br />
2<br />
1<br />
(235)
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