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  1. #31

    Mar 2009
    Deventer, The Netherlands
    :
    Lead Consultant
    585


    , .
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    , DIN 4701 ( )..

    :

    1)Q=k*A*
    2)Q=k*A* + *(,)*( )*( )

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    . 4, .

    . 2 , 80 .

    2,80 , 2 ( ). .

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  2. #32

    Jun 2008
    Glyfada, , Greece.
    :
    3,101
    quote:Originally posted by mechatron

    ,
    1. ASHRAE h=1,32*(/L)^0,25 h=2,29 W/m2K .

    2. h 11 W/m2K 29-20 * 11= 99W/m2
    Mechatron
    1. ASHRAE vertical plates[}]. !
    original horizontal plates. . (29+18)/2 . 20 23,5.

    2. 99? ! !

    3. Mechatron DDD: !! . 18 handbook Valsir .

    4. ! !


    ..
    ! . .



  3. #33

    Mar 2009
    Deventer, The Netherlands
    :
    Lead Consultant
    585
    ..

    , 21 , .
    , 23,5 20( ..).. 20 , 30 , . . Grashoff.. .

    , ASHRAE .

  4. #34
    quote:Originally posted by mechatron
    , .
    ; .... , .
    . : ) 67kw ) , , .. 90 .
    ....

    .

  5. #35

    Mar 2009
    Deventer, The Netherlands
    :
    Lead Consultant
    585
    , . , . .

    , , 26 , . 1,5 . , 2-3 . 1-2 , .
    , , , .

  6. #36
    .
    << >> .
    Dipoli .

    .

    echatron .
    ... .
    2-3 30 . 4 .

    DDD - ...
    .

    .
    ...
    .
    ..


    http://udravlikos.gr

  7. #37

    Mar 2009
    Deventer, The Netherlands
    :
    Lead Consultant
    585
    , .



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    .

  8. #38

    Jun 2008
    Glyfada, , Greece.
    :
    3,101
    ' . . .
    quote:
    , ?
    !
    F2009 [8D]
    2600 : . 1980 characteristic length L , . F ' L. . L hc. : 44 L=1, 34 L=0,857, 56 L=1,364 ...
    , hc=2,0 W/mK : 50 ( 5 ). . Mech. ! , !

    , . : 7 8 . ' . F forced conv. & natural conv. ' . Simplified . simplified. ( 20) Ra=925 . simplified 1,6 . ! ! : . .
    . .

    :
    :
    1. . : ; .
    2. convection heat transfer . ; ; ( ' ).
    3. . Mech DDD ' topic ;
    . . ! () . ! ; !

    ; , virtual ; ; : ' , ' ! traditional heating system. . . hot-wire . 150 . , . . . - -. . ! ' ! 40 38 ! ! 42 , 42 . [8D]



  9. #39
    Super Moderator DDD's Avatar
    Jul 2007
    Athens, , Greece.
    :
    1,695
    quote:Originally posted by Pirate

    ... Mech DDD ' topic ;
    , . . , . ( , ). + ( ). . , , .

    manual Valsir 18. 1.5 1.4.3 1.4.4. . , hot-wire . ;

  10. #40


    DDD Mechatron


    ;

    .

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