Heating a facility box in winter time.

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  1. - 2nd October 2009, 08:40 #1
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    Default Heating a facility box in winter time.

    I have a metal box with some electronics inside.

    This boxis going o be placed in a place where in winter temp. can be very low.

    The volume of the box is about 2 liters and I want to calculate how much energy is going to be needed for the internat temperature not be below say of 5 degrees when the outside may be -20 Celsius.

    A big heatsink with a power transistor is the possible solution the heat the box, but how many watts are needed to do that in relation to the temperatures?

    Ioannis
    www.signalcom.gr
  2. - 2nd October 2009, 08:51 #2
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    Wink How long takes the gun muzzle to cool down ???

    Hi, Ioannis

    Some more info are necessary ...

    - box placed in an open place ??? ( rain or snow can cover it ???)
    - box vertical or Horizontal ( I or __ )
    - put on a shelf ???
    - is there "wind" around ( forced convection ? )

    not so simple a Thermal convection problem ...

    Alain

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  3. - 2nd October 2009, 09:23 #3
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    Default

    Hi Alain.

    Thanks for the reply. Well, the box is in the open space but protected from rain/snow.

    It will be in vertical position so the heat sink is going to be place on the bottom.

    Mounted on a wall.

    As it is in the open, I intent to put some insulation on the inner walls of the box.

    Sure is not easy problem...

    Ioannis
    www.signalcom.gr
  4. - 2nd October 2009, 12:37 #4
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    Talking

    LOL ...

    I just forgot to ask for the main data : your box dimensions !!!

    Alain
    ************************************************** ***********************
    Why insist on using 32 Bits when you're not even able to deal with the first 8 ones ??? ehhhhhh ...
    ************************************************** ***********************
    IF there is the word "Problem" in your question ...
    certainly the answer is " RTFM " or " RTFDataSheet " !!!
    *****************************************
  5. - 2nd October 2009, 13:05 #5
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    About 2 lt. Exact dimensions are to be determined.

    Ioannis
    www.signalcom.gr
  6. - 2nd October 2009, 13:44 #6
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    ...

    they are needed ...

    Even approximative ( 10 cm , 50 cm , 2 meters ??? ) just to fix the power range ...

    Alain
    ************************************************** ***********************
    Why insist on using 32 Bits when you're not even able to deal with the first 8 ones ??? ehhhhhh ...
    ************************************************** ***********************
    IF there is the word "Problem" in your question ...
    certainly the answer is " RTFM " or " RTFDataSheet " !!!
    *****************************************
  7. - 2nd October 2009, 14:12 #7
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    OK. 30x40x25 will be close enough.

    Thanks, Ioannis
    www.signalcom.gr
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