Fuels

Often, cooking stoves solutions are limited by the type of fuel that is readily available to the people using it. This is a quick introduction to various cooking fuels, and all of the information has been generously shared by stoves list participants.

Wood ChipsWood and Wood Chips Pellet Fuels (Wood and Other)Pellet Fuels (Wood and Other) PaperPaper
Biomass BriquettesBiomass Briquettes Stick WoodStick Wood CharcoalCharcoal
StrawGrass and Straw Coconut Palm and HuskCoconut Palm and Husk Palm FrondsPalm Fronds
Solar StovesSolar Stoves

Light introduction to energy scale and efficiency rate

The amount of energy available in a given fuel, is an important factor in stove selection. For example, one Kilogram’s of charcoal is equivalent to 2 kilogram’s of dried wood and 4 kilogram’s of wet/freshly cut wood. One Kilogram of Kerosene is equivalent to over 5 Kgs of wet wood, 3 Kgs of dried wood and 1,5 Kgs of charcoal

Energy Value of Various Fuels
Description Heating Value
(MJ/kg)
Wet Firewood (60% moisture content) 8
Cow Dung 10
Tree Residues (twigs, leaves, etc.) 13
Agricultural Residues (straw, cotton stalks, etc.) 13
Air Dried Firewood (20% moisture content) 15
Densified Briquettes (wheat straw, rice husks, bagasse, etc.) 16
Oven Dried Firewood (10% moisture content) 20
Peat 21
Charcoal 28
Charcoaled Briquettes 30
Kerosene 44
Biogas 45
Liquid Propane Gas 46

(Fuel values from the UNJLC Cooking Fuel Help Doc (pdf) )
For a more technical presentation, also see the Fuel Composition-Conversion and Equivalence Ratio Diagrams

Simply using the table above, there's a temptation to only choose fuels, from the "higher value" end of the list. However, lower value fuels may be simpler to obtain, have smaller transportation costs, and more cultural acceptance among the groups of people best served by a particular stove.

Use the fuels menu (at left) to see a selection of stove designs and projects indexed by the particular fuels you are interested in.

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