heat transfer on boilers

[luft]

I am working on modelling the heat transfer on boilers. It involves several tasks, including radiative and convective phenomenons. Can somebody help me to find (at web) references about this subject?

 

[davefitz]

try the book "boilers, evaporators, and condensers" by S. Kakac ( editor).

 

[davefitz]

The book by kakac provides good guidance on boiler heat transfer in all areas. The prediction of the radiant furnace heat transfer is provided in more detail by A.G. Blokh in "heat transfer in steam boiler furnaces" ( 1987). This "russian normative method" is not as sophisticated as modern galerkin numerical CFD methods, but it gives a good estimate of overall furnace absorption and furnace exit gas temperature ( FEGT). You would have to make your own calculated adjustments to estimate the local radiant heat flux as a function of height along the furnace wall, around the perimeter, and the spot peak absorption to a samll section of waterwall due to loss of slag coverage. Of course, there is no a priori mtheod of knowing when and where the slag will fall off, so all tubes must be designed to be suitable for the spot absorption rate.

 

[luft]

Dear Davefitz,
thanks for your suggestion.

Luft.

 

[chicopee]

There are three types of boilers:
Water tube w/ and w/o superheater, economizer and air preheater
Fire tube w/ and w/o ......
Flow-Thru generator
So which type would you be modelling?
There are boiler books by major manufacturers such as Bobcock & Willcox and Combustion Engineering. These books have heat transfer details for combustion chambers, water tubes, superheaters etc. While ASME/NB power and heating boiler codes relate to the manufacturing, design and safety, you may find them useful.

 

[luft]

Dear chicopee,
I am modelling a water tube boiler. Thanks for your answer.

Luft.