Fuller, Robert, Aye, Lu and Shakya, B.D. 2004, Thermal evaluation of a low cost wood burner, in ANZSES 2004 : Solar 2004 : Life, the universe and renewables, Australian and New Zealand Solar Energy Society, [Perth, W.A.], pp. 1-10.
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ANZSES 2004 : Solar 2004 : Life, the universe and renewables
Australian and New Zealand Solar Energy Society
Place of publication
Small-scale producers of dried products in rural areas of developing countries must often rely on sun drying to dry their crops, but this can be unreliable and produce an inferior product. There is therefore a need for simple and inexpensive combustion devices that can be fabricated and used locally. A wood burner has been constructed from a "200 litre" steel drum and has then been evaluated experimentally. The thermal efficiency of the burner was found to be 31% in two trials. An energy balance, calculated for three trials, was within + 16%. Approximately one third of the energy available in the wood was lost in the flue gases, either as sensible heat or unburned volatile gases. Excess combustion air through the burner was calculated and measured to be approximately 400% of the stoichiometric requirements. A significant amount of energy was required to heat the thermal mass surrounding the burner, indicating that a lightweight insulated structure would be more suitable in most circumstances.
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