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Thermal conductance

Thermal conductance

Thermal conductance

(OP)
I'm determining the overall u-value accross a wall section. In the formula for doing this there is an "alpha". One for the outside and one for the inside. It is the thermal conductance, W/m2*K. Determining the value of this tends to be difficul since it depends on air speed, temp etc, so I was hoping someone in here had a few tips on how to find it. Anything will be appreciated!

RE: Thermal conductance

If you don't know "air speed, temp," how do you expect anyone else to know about your specific design conditions?

TTFN



RE: Thermal conductance

(OP)
I know all of these, but I don't have an equation in which to put them and stir them all into a single number.

RE: Thermal conductance

Unfortunately the equation to be used depends on the conditions (regime)! smile

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