Burning Holey Briquettes
Richard Stanley, Kampala, Uganda, September 2003
The following photos are of burning briquettes showing the location of combustion and the insulative value of the biomass. The briquettes are made of various mixtures of sawdust, coffee husks, leaves, etc.
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| The hollow core briquette tends to provide its own combustion chamber insulation. Although shown here at early in the burn cycle, it will on average, retain this insulative property for up to 35 minutes of its 45 minute burn duration |
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| Top view of burning briquette |
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| Side view of burning briquette |
In this open burn situation with no particular attention to primary and secondary air control, combustion chamber insulation or ducting of exhaust, the holey briquette clearly burns, from the inside out and from the bottom to top.
It is as well, in this same setting, difficult to top light and harder still, to burn off the top before burning up the core.
Richard Stanley
Kampal, UgandaNote: See other articles by Richard Stanley