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Thread: Combined Thermal Conductivity of I Beam with different k values

  1. #1
    Associate Engineer
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    Mar 2021
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    Combined Thermal Conductivity of I Beam with different k values

    Hi There
    Hope you can help me. I need to calculate a thermal conductivity of a 3 piece constructed I Beam.
    The flanges are in a different material to the web. Flanges are 0.029m x 0.029m with k value of 0.075 W/m⋅K and the web is 0.009m x 0.05m with k value of 0.12 W/m⋅K
    The 3 materials are in series, and at this stage can ignore any join between the 3 of them. I have tried various methods but nothing looks correct.
    Many thanks in advance
    David

  2. #2
    Administrator Kelly Bramble's Avatar
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    Feb 2011
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    Bold Springs, GA
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    Tell me and I forget. Teach me and I remember. Involve me and I learn.

  3. #3
    Principle Engineer Cragyon's Avatar
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    Feb 2013
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    Newark, NJ
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    You could actually use the "Heat Loss Double-Pane Window Equation and Calculator".

    https://www.engineersedge.com/heat_transfer/heat_loss_doublepane_window_13864.htm

    Just set the k to the values needed.

  4. #4
    Associate Engineer
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    Mar 2021
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    Thanks Kelly

  5. #5
    Associate Engineer
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    Mar 2021
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    Thanks Cragson.

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