[Stoves] Foyers a bois institutionnels au Cameroun

[Crispin Pemberton-Pigott]

Dear Xavier

How about making a loose frame of 50 x 50 x 5 angle iron shaped like a Top
Hat that is a little bit loose, and dropping that into the top of the
combustion chamber to protect the brickwork?

As they knock it around, it will rattle a bit but that is not a problem. It
could be easily replaced and would last a long time. If the bricks get
loose, they would be help in position by the frame.

There is little point putting in something 2mm thick. And welding it into
place makes maintenance more difficult. 

You can get 'unequal' angle iron. For example 51 x 76 x 6 mm. Put the long
side hanging down. The reduction in the gas path cross section is not
important for such a distance.

I just heard from someone investigating stove emissions in Ulaanbaatar.
There is coal vendor who burns only wood at home! She usually does exactly
what you describe: she puts a large round log vertically in her TLUD Silver
stove (cast iron with refractory lining) and lets it burn down over 8 hours.
Claims it heats more evenly than TLUD coal. That is debateable but save that
for another discussion.

Regards
Crispin


+++++++++++

>....Putting heavy logs from the top can remove the top bricks at first,
then dismantle the brick combustion chamber over time. We found bricks on
the ground near the stoves. That's why I thought a sheet metal plate could
be welded on top of the first layer of bricks, in order to protect the
bricks.

Cheers,

Xavier