LUCIAN GAVRILĂ – Fenomene de transfer II - Cadre Didactice

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3/14/2003 Variaţia temperaturilor în timp şi în spaţiu ΔT * m = T ln 1i T T − 1i 1 f T − − 1 f – media logaritmică dintre (T1i –T2 ) şi (T1f –T2 ) – media logaritmică dintre 1 şi 1/B: T 2 T 2 ⋅ B B −1 1− 1 B = B ⋅ ln B 1 ln 1 B B −1 ln LUCIAN GAVRILĂ – Fenomene de transfer II 68 ⋅ B (259) (260)
3/14/2003 Variaţia temperaturilor în timp şi în spaţiu o Integrand (248) între t = 0 şi t = t rezulta debitul necesar de fluid de răcire (2): Q m = m2 m = m2 c ⋅ p2 c ⋅ p2 ⋅ Q ( 0 ) T m − T ( 0 ) T m − T 2 2 2 LUCIAN GAVRILĂ – Fenomene de transfer II 69 2 (261)
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3/14/2003 TRANSFERUL GLOBAL DE CĂL
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1 1 - transfer convectiv prin filmu
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3/14/2003 TRANSFER TERMIC GLOBAL o
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3/14/2003 TRANSFER TERMIC GLOBAL oL
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3/14/2003 Transfer global de căldu
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Page 17 and 18: 3/14/2003 Transfer global de căldu
Page 23 and 24: T T 1 T 2 3/14/2003 Transfer global
Page 27 and 28: T 1i T 1i T 2i 3/14/2003 T 2i ΔT T
Page 29 and 30: T 1 3/14/2003 T 2i a) T 2f H = H H
Page 35 and 36: osau: 3/14/2003 Transfer global de
Page 47 and 48: 3/14/2003 Transfer termic la poten
Page 49 and 50: 3/14/2003 1 2 T 1i T 2i Fluidul 1 t
Page 51 and 52: 3/14/2003 Variaţia temperaturilor
Page 55 and 56: ose obţine: 3/14/2003 Variaţia te
Page 67: 3/14/2003 Variaţia temperaturilor
Page 73 and 74: 3/14/2003 Transfer termic direct f
Page 79 and 80: 3/14/2003 Transfer termic direct cu
Page 89 and 90: Re g 3/14/2003 Transfer global de c
Page 95 and 96: 3/14/2003 VALORI ORIENTATIVE ALE CO
Page 97 and 98: Analiza coeficientului global de 3/
Page 99 and 100: Analiza coeficientului global de 3/
Page 101: Analiza coeficientului global de 3/
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LUCIAN GAVRILĂ – Fenomene de transfer II - Cadre Didactice

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