LUCIAN GAVRILĂ – Fenomene de transfer II - Cadre Didactice

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3/14/2003 Transfer global de căldură la potenţial termic constant oDacă peretele cilindric este format din mai multe straturi de grosimi şi conductivităţi diferite, atunci expresia fluxului unitar devine: q = d 1 1 ⋅ α 1 + n ∑ = 1 ( T − T ) 1 2 π 1 d ⋅ ln i+ 1 + 2λ d d i i ⋅ i+ 1 LUCIAN GAVRILĂ – Fenomene de transfer II 20 i (222) 1 ⋅ α 2
3/14/2003 Transfer global de căldură la potenţial termic constant o Expresia fluxului termic se scrie: Q = q ⋅ l = oîn care l reprezintă lungimea peretelui cilindric. d 1 1 ⋅ α 1 + n ∑ = 1 ( T − T ) 1 2 π 1 d ⋅ ln i+ 1 + 2λ d d i i ⋅ i+ 1 LUCIAN GAVRILĂ – Fenomene de transfer II 21 ⋅ i l 1 ⋅ α 2 (223)
Page 1 and 2: 3/14/2003 TRANSFERUL GLOBAL DE CĂL
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Analiza coeficientului global de 3/
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LUCIAN GAVRILĂ – Fenomene de transfer II - Cadre Didactice

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