[Stoves] RE`: Dung cakes

[Crispin Pemberton-Pigott]

Dear Andrew

Great set of pics.

This is a good example of how not to burn dung:

[cid:image002.jpg at 01D2E5E4.102881C0]
Note that the fire is 'pushing' through the dung . It is really important, to get the smoke to burn, that the fire be behind the fuel, and work its way forward to the door/entrance.

Here is another bad example:

[cid:image006.jpg at 01D2E5E4.102881C0]

Fire lit at the door, drafting through all the fuel which will try to burn all at once. Result? Lousy draft, terrible combustion and way too much heat for a short time followed by very low heat at high excess air.

Here is a stove fueled wit dung and lit at the end (where the gases exit)
[cid:image008.jpg at 01D2E5E4.102881C0][cid:image012.jpg at 01D2E5E4.102881C0]
The result is much cleaner burning with a lot of free heat provided by the now-consumed smoke.

Look through the small hole in the left photo. That is a dung cake broken into 4 pieces. They are larger than a dinner plate and about 60mm thick in the centre. That is common in Central Asia.


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