ETHOS Meeting, Seattle, January 11-12, 2003 Stoves, Fuels and People
ETHOS Meeting, Seattle, January 11-12, 2003
Engineers in Technical Humanitarian Opportunities of Service
Northwest College, Kirkland, Washington
 |
 |
 |
 |
|
Discussions
|
Congratulations
Don O'Neal, Helps International Shell Foundation Sustainable Energy Program Grant 2002 |
Outdoor Stoves Demonstrations
|
Serious Lectures
Hot Debates |
 |
 |
 |
 |
A group of thirty stoves enthusiasts met for a weekend to compare ideas, demonstrate stoves and concepts and plan collective volunteer activities toward stove development and dissemination. Participants included students, individuals and organizations involved in stoves development. Many thanks to Mark Bryden and his family and to Northwest College for hosting the event.
Research from the past year was presented on stove materials (University of Dayton, Ohio), heat exchange models (Iowa State University), air and temperature experiments (Aprovecho). Alternative designs were described and demonstrated. Field experience from Mexico, Central and South America and Africa was described (Aprovecho, Biomass Energy Foundation, GTZ/ProBEC, Helps, Juntos, Peace Corps, Prolena, Rotary International, Solar Energy Asscociation, Trees Water and People, Unafamilia). Stories were told. Needs and interests were identified and work groups were formed for 2003.
A report of the plans and activites will be presented on the ETHOS website. The photos below show some of what was discussed.
 |
 |
 |
| Field Tools and Fuels were much discussed | Improved Volatile and Char Combustion in stoves and burners | Combustion of Volatile Gases with a Charcoal Byproduct in gasifiers |
 |
 |
 |
| Combustion Chambers included the Rocket Elbow in many forms | A Rocket with Air from A Screen Below | and natural and forced draft metal gasifiers |
 |
 |
 |
| Materials included different kinds of insulating firebrick, one that could be cut with a handsaw | Fired mixtures of clay and pumice or organic matter | Strength and durability was tested for fired brick components |
 |
 |
 |
| UC Dayton's Anna Andrekanic | and Melissa Cruz reported | on strength testing |
 |
 |
 |
| Modular stove segments were cut and cast | permitting rapid prototyping like a rocket chamber built to the stack dimensions of Prasad (1991) | or fit with a skirt to accept a pot |
 |
 |
 |
| Metal Stoves included this Juntos natural draft gasifier | a forced air Turbo gasifier with fan | and a rocket stove for heating a round xumal or for Nixtamal pot (estufa Nixtamal) |
 |
 |
 |
| Here is a self feeding stove for sticks | and an idea for a self feeder for bulk fuels like hulls, husks or sawdust | small sticks are constantly fed for good control |
 |
 |
 |
| Corncobs, paper and wood pellets were gasified | Fuel and temperature control were discussed | and demonstrated by Damon Ogle |
 |
 |
 |
| to produce varying amounts of gaseous combustion | Primary (underfire)and secondary (overfire)air and the importance of radiant heat | from both char and volatile combustion lead to combustion efficiency |
 |
|
 |
| Adjustments were made to air for gasifying for turn-it-down , | or turn-it-up measurements | while stoves were fed with sticks |
 |
 |
 |
| Foods included beans brought to boil in a pot then | kept in a quilt (or "haybox") for an hour | and sampled by everyone |
 |
 |
 |
| Split pea soup was cooked in a pan on a turbo | Tom Reed explained and demonstrated Principles of gasification | Flame type and color was discussed |
 |
 |
 |
| Field applications were discussed by all:
Damon and Rogerio Miranda |
Patrick Flynn | Peter Scott |
 |
 |
 |
| Jim Wilmes (Unafamilia) | Tom Reed and Don O'Neal | Larry Winiarski |
 |
 |
 |
| Ron Larson | Lisa Buttner and Bryan Willson | Dean, Rob Bailis, Dana |
|
|
 |
| Paul Anderson, Tami, Rob | Jerry Frisch, Larry Winiarski | Mark and Tom |
|
 |
 |
| Wilfred Pimental, Stuart Conway, Jim, Ken Goyer . . . | and panels: Dissemination (Rogerio,Larry, Lisa, Don, Stuart, Tom) | ISU's Doug McCorkle, Greg Sommer report on heat transfer modelling |
 |
 |
 |
| Then Dean got out his CO meter | filled bags with hot air | sealed the bag |
 |
 |
 |
| and made "pseudo scientific" measurements | which were much debated | by health and emissions experts |
 |
 |
|
| Dana Charron on health | Tami Bond on aerosols | and many people who were not photographed (my apologies) |
 |
 |
 |
| while stoves were fed | . . . and fed | . . .and fed |
Many thanks to all the participants. As they say ,"We will see you all here online and in . . ." ETHOS Summer Camp 2003 in June (in Oregon) and in Central America.
Everyone is invited. Look for announcements on the stoves and ethos email lists.
Tom Miles
February 1, 2003
Photo by Rob Winiarski