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Thread: moving thermal radiation (heat) in a vacuum

  1. #1 moving thermal radiation (heat) in a vacuum 
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    got a question

    can you move heat in a vacuum with fans ?

    for example say

    a. a vacuumed and sealed environment

    b. a thermal source which continuously generates heat

    c. fans

    d. a cooling block beyond the fans


    that's the experiment

    what i know so far

    1. in a vacuum heat (BTU) is mostly in the form of infrared radiation

    2. that fans should not do any thing without atmosphere



    the question

    can fans in a vacuum move infrared radiation away from the heat source to cooling source

    if not what is a way to move thermal radiation in a vacuum

    thanks


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  3. #2  
    Moderator Moderator Dishmaster's Avatar
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    No, this is not possible, because fans use the gas that they blow toward the hot material. In vacuum, basically only radiation works. If the heat source is coupled to something, the heat current to the other body can also transport the heat.


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  4. #3 Re: moving thermal radiation (heat) in a vacuum 
    . DrRocket's Avatar
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    Quote Originally Posted by andrewd
    got a question

    can you move heat in a vacuum with fans ?

    for example say

    a. a vacuumed and sealed environment

    b. a thermal source which continuously generates heat

    c. fans

    d. a cooling block beyond the fans


    that's the experiment

    what i know so far

    1. in a vacuum heat (BTU) is mostly in the form of infrared radiation

    2. that fans should not do any thing without atmosphere



    the question

    can fans in a vacuum move infrared radiation away from the heat source to cooling source

    if not what is a way to move thermal radiation in a vacuum

    thanks
    Thermal radiation in a vaccuum is already moving -- at the speed of light. In fact it is light, infrared generally, but certainly photons.
    http://www.engineeringtoolbox.com/ra...fer-d_431.html
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  5. #4  
    Forum Masters Degree organic god's Avatar
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    yeh but i think the post is whether or not the radiation can be redirected whilst in teh vacuum
    everything is mathematical.
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  6. #5  
    Forum Radioactive Isotope MagiMaster's Avatar
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    A infrared mirror would work.
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  7. #6 thanks for the answer 
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    basically i figured it wouldn't be possible either so ill have to go with a normal atmosphere and use good ol convection thanks a lot please feel free to discuss the movement of heat in a vacuum and the various ways in which it could be done
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  8. #7  
    Forum Radioactive Isotope MagiMaster's Avatar
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