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Heat transfer from a steel box

  1. Feb 12, 2010 #1
    I have a heat source inside a steel box. I know the outside ambient air temp and the amount of heat the source puts of. How do I calculate the internal air temp of the box?
  2. jcsd
  3. Feb 12, 2010 #2
    Use the basic relation: Q = Delta Temperature / RT

    Q = Heat Flow
    Delta Temperature = Temperature (inside box) - Temperature (outside box)
    Thermal Resistance = convenction and conduction resistance

    Now, the inside of the box will get hot enough (increase in temperature) to get the energy of the heat source out so

    Q = heat flow = heat source

    Your thermal resistance will be mostly from natural convection inside and outside the box.
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