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Bridgewall Temperature

Bridgewall Temperature

Bridgewall Temperature

(OP)
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.  

RE: Bridgewall Temperature

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
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.

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