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LUCIAN GAVRILĂ – Fenomene de transfer II - Cadre Didactice

LUCIAN GAVRILĂ – Fenomene de transfer II - Cadre Didactice

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3/14/2003<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)

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