LUCIAN GAVRILĂ – Fenomene de transfer II - Cadre Didactice

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3/14/2003 Transfer global de căldură la potenţial termic constant ocăderile parţiale de temperatură prin filmul (1), prin peretele solid şi prin filmul (2) se pot scrie: ΔT 1 ΔT ΔT 2 3 = = = ( T − T ) 1 ( T − T ) p1 ( T − T ) p2 p1 p2 2 = = Q = s Q Q s 1 ⋅ α ⋅ s LUCIAN GAVRILĂ – Fenomene de transfer II 14 1 A δ ⋅ λ ⋅ A 1 ⋅ α ⋅ A 2 (216)
3/14/2003 Transfer global de căldură la potenţial termic constant oCăderea totală de temperatură între cele două fluide se obţine însumând membru cu membru ecuaţiile (216): ΔT = Q = s A ⋅ T 1 −T 2 = Q ⎛ ⎜ ⎝ + n ( R + R + R ) = q∑ 1 2 3 i= 1 s A ⋅ 1 α 1 δ λ + R i LUCIAN GAVRILĂ – Fenomene de transfer II 15 1 α 2 ⎞ ⎟ ⎠ = (217)
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LUCIAN GAVRILĂ – Fenomene de transfer II - Cadre Didactice

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