et la surface interne de la paroi ds 1 T 1 avec un coefficient déchange h 1

Et la surface interne de la paroi ds 1 t 1 avec un

This preview shows page 3 - 7 out of 11 pages.

) et la surface interne de la paroi (ds 1 ,T 1 ) avec un coefficient d’échange h 1 . - Conduction à travers la paroi entre la surface interne (ds 1 ,T 1 ) et externe (ds 2 ,T 2 ). - Convection entre la surface externe de la paroi (ds 2 ,T 2 ) et le fluide froid ( T F ) avec un coefficient d’échange h 2 . - Conservation de flux : 2 1 1 2 2 1 1 1 2 2 ( ) , 1 1 2 . . C F th r Ln T T T T T T r d Rth R dxk h ds h ds -3-
Image of page 3

Subscribe to view the full document.

1 1 2 2 1 1 . . C F th T T d R h ds h ds * Paroi mince d’épaisseur ) ( 2 1 ds ds ds 1 1 2 2 1 2 1 1 1 1 . . . C F C F th th T T T T d ds R ds R h ds h ds h h 1 2 1 , . . 1 1 . G th K ds dx D ds R h h K G coefficient de transmission global. ) .( . F C G T T ds K d Températures et flux sont fonction de x. ( ) . .( ( ) ( )) . . ( ) G C F G d x K ds T x T x K ds T x IV. CAS CO-COURANT * A l’abscisse x : ( ) ( ) C F T T x T x * Flux échangé entre x et x+dx: ( ) . .( ( ) ( )) G C F d x K ds T x T x ( ) . . . . , G d x K D dx T D diamètre du tube ( ) . . . . mC PC C mF PF F d x q C dT q C dT  -4-
Image of page 4
( ) ( ) , . . C F mC PC mF PF d x d x dT dT q C q C  ( ) C F C F T T T d T dT dT 1 1 ( ) ( ).( + ) . . mC PC mF PF d T d x q C q C  1 1 ( ) . . . . .( + ) . . G mC PC mF PF d T K D dx T q C q C  ( ) 1 1 . . . .( + ) . . G mC PC mF PF d T K D dx T q C q C  0 0 ( ) 1 1 . . . .( + ) . . x x G mC PC mF PF d T K D dx T q C q C ( ) ( ) 1 1 exp( . . .( + ). ) . . C F G CE FE mC PC mF PF T x T x K D x T T q C q C A la sortie x=L : 1 1 ( ) . . .( + ). . . CS FS G CE FE mC PC mF PF T T Ln K D L T T q C q C  Flux global échangé entre l’entrée et la sortie : . .( ) . .( ) mC PC CS CE mF PF FS FE q C T T q C T T   -5-
Image of page 5

Subscribe to view the full document.

( ) ( ) 1 1 , .
Image of page 6
Image of page 7
  • Fall '16
  • Convection, froid, flux thermique, Échangeur de chaleur

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern

Ask Expert Tutors You can ask 0 bonus questions You can ask 0 questions (0 expire soon) You can ask 0 questions (will expire )
Answers in as fast as 15 minutes