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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 termic direct fără<br />

schimbarea stării <strong>de</strong> agregare<br />

oÎn schimbătoarele <strong>de</strong> căldură <strong>de</strong> amestec fără<br />

schimbarea stării <strong>de</strong> agregare, agenţii termici pot<br />

fi:<br />

<strong>–</strong>două lichi<strong>de</strong>,<br />

<strong>–</strong>două gaze,<br />

<strong>–</strong> un solid (dispersat în particule foarte fine) şi un fluid<br />

(lichid sau gaz).<br />

o În cazul <strong>transfer</strong>ului termic gaz <strong>–</strong> gaz sau lichid <strong>–</strong><br />

lichid în aparate cu sau fără agitare, <strong>transfer</strong>ul<br />

<strong>de</strong> căldură are loc foarte rapid, datorită<br />

suprafeţei foarte mari <strong>de</strong> contact.<br />

<strong>LUCIAN</strong> <strong>GAVRILĂ</strong> <strong>–</strong> <strong>Fenomene</strong> <strong>de</strong> <strong>transfer</strong> <strong>II</strong> 74

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