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Thermal conductivity for insulation calculation

Thermal conductivity for insulation calculation

Thermal conductivity for insulation calculation

(OP)
I use a multitude of refractories and insulation. The manufacturer of the materials has thermal conductivity information on the data sheets for certain temperatures. How do I calculate the thermal conductivity at temperatures other than what is on the sheet?

Example: HD Board: 0.570 BTU-in/hr-ft2-°F @ 500 °F
                   0.800 BTU-in/hr-ft2-°F @ 1000 °F

I want to calculate for 100°, 200°, etc.

RE: Thermal conductivity for insulation calculation

(OP)
Thanks IRstuff. I'm not sure this is my answer. When I use a refractory board for example, the data gives me certain thermal conductivity values for a certain temperature. If in the example above, which is K-Fac 19, I want to calculate for temperatures of 600°, 700°, 800° and 900°F what formula would I be looking for? Is this something I can only get from the vendor of the insulation? I'm stumped.

Thanks for your assistance.  

RE: Thermal conductivity for insulation calculation

Thank you.  

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