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LUCIAN GAVRILĂ – Fenomene de transfer II - Cadre Didactice

LUCIAN GAVRILĂ – Fenomene de transfer II - Cadre Didactice

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3/9/2003<br />

CONDENSAREA VAPORILOR<br />

Con<strong>de</strong>nsarea peliculară pe o ţeavă<br />

orizontală<br />

oDacă se consi<strong>de</strong>ră peretele ţevii ca un perete<br />

format din porţiuni infinitezimale având înclinări<br />

variabile între 0 o şi 180 o , se obţine expresia:<br />

0,<br />

725<br />

1<br />

0<br />

( )<br />

4<br />

v p T T<br />

α = ⋅<br />

(206)<br />

d −<br />

o în care α 1 este dat <strong>de</strong> relaţia (200), iar d este<br />

diametrul exterior al ţevii.<br />

α<br />

<strong>LUCIAN</strong> <strong>GAVRILĂ</strong> <strong>–</strong> <strong>Fenomene</strong> <strong>de</strong> <strong>transfer</strong> <strong>II</strong> 45

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