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 Explicitând dT 1 şi dT 2 din (226) şi (227):<br />
⎛ 1 1 ⎞<br />
dT − dT = −⎜<br />
+ ⎟ ⋅<br />
1 2 ⎜ m ⋅ c m ⋅ c ⎟<br />
⎝ m1<br />
p1<br />
m2<br />
p2<br />
⎠<br />
o Notând expresia din paranteză cu f, (228)<br />
se mai poate scrie:<br />
dQ<br />
( T T ) f dQ<br />
1<br />
s<br />
dT dT = d − = − ⋅<br />
1<br />
− 2<br />
2<br />
<strong>LUCIAN</strong> <strong>GAVRILĂ</strong> <strong>–</strong> <strong>Fenomene</strong> <strong>de</strong> <strong>transfer</strong> <strong>II</strong> 34<br />
s<br />
(228)<br />
(229)