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  1. #1

    Dec 2009
    Rhodes, , Greece.
    :
    8



    .
    (,) 10 3,5 W/m2K.
    ? U=1/(Rsi+(d1/k1)+(d2/k2)+(d3/k3)+Rse)
    Rsi= ( )(m2K/W)
    Rse= ( )
    d=
    =
    1=
    2=
    3=
    ?

  2. #2
    Super Moderator DDD's Avatar
    Jul 2007
    Athens, , Greece.
    :
    1,695
    Rsi, Rse; .

  3. #3

    Dec 2009
    Rhodes, , Greece.
    :
    8
    =2,5 W/(m*k) 10.
    =1,39 W/(m*k) 2,5.
    . .
    Rsi=0,1 W/(m*k)
    Rse=0,04 W/(m*k)
    . 2007.
    , ? .

  4. #4
    Super Moderator DDD's Avatar
    Jul 2007
    Athens, , Greece.
    :
    1,695
    quote:Originally posted by sufirod


    . .
    0,871 W/mK.

    3,5 W/m2K . . U ; 3,5

  5. #5

    Dec 2009
    Rhodes, , Greece.
    :
    8
    U=5 . ' . U ?
    ?

  6. #6
    Super Moderator DDD's Avatar
    Jul 2007
    Athens, , Greece.
    :
    1,695


    . :

    ,

    d1=0,025 m, k1=1,39 W/mK
    d2=0,1 m, k2=2,03 W/mK
    d3=0,01 m, k3=0,871 W/mK

    h()= 8,30 W/m2K, h()=23,24 W/m2K ( .

    :



    U = 4.131 W/m2K

    :

    ) Kcal/h.m2.K W/m2.K kcal/h U = 3.55 kcal/h.m2.K

    ) h K ( ) .


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