Bridgewall Temperature

[padovano]

Dear All, I would like to know how I can go about calculating the bridgewall temperature of a furnace. ( formula, software etc.) This is for safety measure as regards to daily monitoring of the furnace. Thanks.

 

[zmis]

If this is a direct fired process furnace you might be able to assume a constant gas temperature (calculate heat release and flue gas mass) and then add conduction (fourier), convection (sieder-tate) and radiation (good luck).

The simplest method would be to get your hands on empirical correlations such as the Lobo-Evans data and make some assumptions about what's going on internally (flux rate etc).

This link

http://www.revamps.com/Revamps/documents/170.pdf

has a little bit on the subject. I use curves for this and find theoretical calculations to be inaccurate...too many assumptions necessary whereas a bridgewall-flux curve results in accurate data fast.

 

[IRstuff]

A version of Lobos-Evans paper is located here:

http://www.heaterdesign.com/LoboEvans1.htm

TTFN

FAQ731-376