The 2010 ETHOS Conference is being held in Kirkland, Washington, on January 29th ~ 31st, 2010.

The 2010 ETHOS Conference aims to expand its reach from previous annual meetings, encouraging participation of Southern partners, international stoves experts, and development specialists with field experience in the transfer of cooking technologies.

2010 ETHOS Conference & Registration on their website

Jeffrey R. Davis



Fuelage is a fuel and construction material made from grass or possibly other plant material. After the grass or other plant material has properly retted it is wet extruded in the form of a pellet and allowed to dry.


In the fall of 2007 I was experimenting with composting as a source of space heating. This is called the Thermo-Biopile [2] and can be seen in photo 17. The plant material used was switch grass and wood chips. Photo 15 is the grass field before harvesting and photo 16 is the harvest photo. During the summer of 2008 I noticed a black material when the Thermo-Biopile was disassembled. I saved some of this material to test as a feed stock for Fireballs.

You can refer to my other article in order to understand the Fireballing process [5]. The first step was to place this material in a rotating drum with rocks and then after a period of ball milling the rocks were removed and the feedstock was left in the drum to see if it would agglomerate into balls. The consistency of the material would not allow this but it might be possible if another material was added.

It became obvious that this feedstock would be best used in an extruder so I modified a meat grinder that can be viewed in photo 1. The Fuelage is drying in photo 2 and 3. I'm not sure if this material needs to be milled (in this case ball milled) some before before extruding. An extruder could be designed to dewater and maybe mill this material, thus possibly a higher density particle and shorter drying period. Photo 4 is a picture of a dried particle.

Here is an emergency solar cooker that is made from a cardboard box, aluminum foil, and some glue. Simple, but effective design in order to cook using solar energy.


Urban Justa Stove Building Workshop in San Francisco
Charlie Sellers, July 29, 2008

Sebastian Africano was just through the SF Bay area, building stoves on his way to Stove Camp, and I added this post on his workshop to my evolving IAP site:

“How-To Designs” and Lanny Henson presents,
The “Green Pail”/“Hot Bucket” Retained Heat Cooker.
April 20, 2008

Wood Pellet Camping ad Biofuel Stove
Deris Jeneatte, Cleardome Solar, april 2008

Here's a stove and solar appliances for the camping set. Some concepts may apply to cooking stoves.

Hybrid Stove Making Charcoal (YouTube)
Lanny Henson, July 26, 2007

Biomass cooking stove burns wood to charcoal and saves the charcoal. One pound of wood cooks 6 kilos of rice and makes 65 grams of char.

Hybrid Stove Burning Bamboo Pan Cooking

Here is another 3 min video of the Hybrid Stove burning bamboo chips and pan cooking eggs.
Bamboo chips burns well in the Side Supply Burner but the pan only reached medium heat.
The heat from the burner seems to be diffusing and bypassing the pan. Enough heat is being generated by the burner but the pan module lacks focus.
Suggestions to fix pan module?


Below you will find an interesting discussion, concerning the drying of fuel,
that was on the gasification list.


Greg Manning wrote:
The Drying Process I use is simple, the sun and an inclined sheet of heavy
wire screen mounted in a large tiltable frame, chips are loaded onto the
screen, screen is inclined, and about 3 hours later, the chips start to
slide, or tumble down (moisture released, they are now lighter in mass, and
slide down),

Improved cookstoves are used for diplaced persons in Ethopia, Darfur, Uganda and for Hurricane or Flood Victims.

OSHA CO Factsheet
Occupational Health and Safety Administration, US Department of Labor, 2002


Subscribe to USA