Thermal conductivity for insulation calculation 1

[Furnman]

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.

 

[IRstuff]

There's an online calculator for some materials; pretty interesting. Valery Ochkov is a long time user of Mathcad.

Or, you can cut to the chase and download Prof. Ochkov's data table for the calculator:

http://twt.mpei.ac.ru/TTHB/HEDH/Tab-5-5-6-Thrm-Cond-Solids.html

TTFN

FAQ731-376
Chinese prisoner wins Nobel Peace Prize

 

[Furnman]

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.

 

[IRstuff]

I see that I left off the calculator's link,

http://twt.mpei.ac.ru/MCS/Worksheets/HEDH/Tab-5-5-6-2-Therm-Cond-Solids.xmcd

. If you look at thermal conductivities, you'll see all sorts of variation, indicating no single equation describing all materials.

TTFN

FAQ731-376
Chinese prisoner wins Nobel Peace Prize

 

[Ofen54]

Thank you.