The Bean Can Stove
Lanny Henson, August 28, 2006
Note: click images to enlarge
The Bean Can Stove is a $5 cooker including the pot.
The Bean Can stove is made totally from used metal containers, (see material
list) even the cook pot and cost about $5USD.
It is the simplest stove that I have designed requiring only hand tools and no fab parts to build.
It seems to be efficient using only 152 grams of hardwood charcoal and 5 grams of wood for starter to cook 2 lb/907gr of dry pintos. That is 26 servings of 35gr ¼ cup dry ½ cup cooked, total volume 3.5 liters.
The combustion air is controlled by elevating the stove with 3 sticks so air can flow underneath.
I paid little attention to the cosmetics of this prototype. It is ugly but it works!
The soaked beans came to a boil at 33min after striking the match.
Then I removed the spacing sticks to reduce the combustion air for
At 1 hour after boiling I could hear rapid boiling.
At 1.5 hours I could hear slow boiling.
At 2 hours I could still hear low simmering.
The beans are cooked at this point (2 hours after boiling) so I capped the
system to retain the heat.
And at 7 hours after boiling the temp was 150 degF/ 65.6 degC.
I am very pleased with the ease of use and construction and the performance
of this cooker.
Next I plan to change the size of the burner so that the pot can sit lower
in the stove.
Also this design could be adapted to use a different type of cook pot
instead of a paint bucket so I will try that.
Thanks for viewing,
3- 5gal metal pails and 2- lids, used $3.
1- one-gallon paint can with lid, used (the cook pot) $1.
1- 1.13 liter/kg can used (burner) ¢25
1- coat hanger ¢10
1- fluffy ash or loose fill insulation. ¢25
4- sheet metal screws ¢28
Two pails make the inner and outer shell. There is a hole in the bottom
where the burner sits for combustion air.
A center fire tin can burner holds 170 grams of high quality hardwood
charcoal. 5 grams of wood and some candle wax, top lights the burner. 18 gr
of char did not burn. A little too much wax created some smoke.
The lid supports the paint can pot just above the burner
One half off a pail/bucket shields the cook pot.
A lid with exhaust hole helps contain the heat.
Very little heat escaped the system through the exhaust during the cooking
At 2 hours after boiling when the charcoal was consumed, I capped the system
with ½ of a pail which held the heat to 150 degF for 7 hours.