Our site is dedicated to helping people develop better stoves for cooking with biomass fuels in developing regions.

For additional detail and information, join the Cooking Stoves Mailing List, browse the archives, read about current projects and ask other cooking stove builders, designers, and organizations disseminating improved stoves around the world.

Dean Still, August 2010

One fine rainy morning two fine fellows from StrawJet (http://www.strawjet.com) , an Oregon company that makes equipment to bundle agricultural waste in Malawi, wandered into the lab and asked if it’s
possible to make a stove that uses bundled corn stalks to cook food. I said that I thought it was possible and after some conversation and testing of prototypes StrawJet put up a $250 prize to encourage Stove Camp participants to make it so.

Burning corn stalks leaves quite a bit of ash that does not fall apart but keeps its shape.
For this reason stoves must be adapted to deal with a lot of solid ash. Two types of stoves
were tested: 1.) A Jon Anderson Rocket Stove with lots of draft and a grate and 2.) Two
large TLUDs built by Paul Anderson and Art Donnelley that were vertically loaded.


Participants voted for the best stove that, in their opinion, was most effective. Jon
Anderson won the 2010 Cat Piss Award for a tall Rocket stove made entirely from found
materials that successfully burned the bundled corn stalks. The hope is that a pilot test
could be conducted in Malawi. If so, we’ll pass along the results.

Jon and his wife Flip have been in Haiti recently for three months helping folks to build
these kinds of Rocket stoves. They are beautiful, dedicated people, who like many folk at
Stove Camp, deserve real praise and adoration. I’m happy to send them some of both and
congratulations for making a wonderful stove!

Stoves Camp 2010, Cottage Grove Oregon

Stoves Camp ParticipantsStoves Camp Participants

Fifty two high energy participants attended Stove Camp this year at Colgan’s Island, camping near the river, making and testing stoves, and listening to Fred’s Big Band harmonize so beautifully. Fred and his volunteers cooked breakfast every morning and dinners at nighttime parties on Rocket and TLUD institutional stoves.


Nick Salmons from International Lifeline Fund made a very successful Haitian charcoal stove that was voted “Best in Class” by his peers!

Stove Camp provides a venue for a gathered scientific community to advance knowledge of biomass cook stoves. Participants made new stoves and tested them daily for fuel use and emissions. Every morning the test data was shared and new stoves were constructed.

This year, a great deal of progress was made on charcoal stoves for Haiti. Camp participants, some of whom have worked in Haiti,designed a two-hour Water Boiling Test for Haiti, which uses a Haiti pot
and mimics a typical cooking task, cooking rice and beans. Charcoal stoves were constructed that used less fuel and produced less carbon monoxide compared to traditional Haitian stoves.

See the attached Stoves Camp Report for details of the tests, the interesting findings about the optimum charcoal to use for each stove, and pictures of the stoves tested.

The aim of this test was to finalise the design of the Anila stove, which had been produced in India ready for distribution to households to gather feedback from them about usability.
This is for the project:

Without wanting to change the design too much from the original plans, the following changes were deemed necessary –

Patrick Bringardner, Project Gaia, August, 2010

A recent assessment conducted by the Women’s Refugee Commission in Haiti found that the price of charcoal has risen by 40% (WRC and WFP 2010). Helping subject populations to develop the capacity to produce liquid biofuels may offer one important solution to energy poverty in Haiti’s displaced communities and contribute to its long term development of energy self-sufficiency.

Clean Cook StoveClean Cook Stove

Project Gaia has been working in Haiti to promote ethanol and the CleanCook Stove - an alcohol based stove - as an alternative to stoves that burn solid biomass (i.e. wood, charcoal, and briquettes.) Ethanol is as clean as LPG, cheaper than charcoal, safer than kerosene and has greater potential than trash briquettes. In Africa, Project Gaia has accumulated over 2 million days of cooking with the CleanCook Stove without a single accident of any significance.

The most common question which arises during our discussions with policy makers and social entrepreneurs is:** “Would the supply of ethanol be sustainable? And where would the supply come from after donations were at an end?” **

This is the key sustainability question and the reason why we are so interested in Haiti. Not only was Haiti once a leading sugar producer and a distiller of beverage ethanol for export as well as the local market, but also Haiti exists on trade routes over which billions of liters of ethanol flow each year on their way to a fuel market in the United States. This ethanol, mostly from Brazil, generally the most competitively priced in the commodity market, will provide a source of fuel for Haiti—cheaper than kerosene—as Haiti builds up its own local production (Ethiopian Petroleum Enterprise Data). In fact, the Brazilian Government has pledged to donate over 100,000 liters and an additional 400,000 liters over the next two years.

Haiti was once a powerful agricultural economy, producing for its own needs. In 1983 Haiti harvested 70,000 hectares of sugarcane. Today it harvests less than 17,000 hectares (Figure 1: Decline in Sugar Cane Production (UN Data World Statistics Pocketbook)). Haiti’s dependence on export markets has increased its vulnerability through its reliance on basic sustenance items it once produced locally. Today it supplements most of its own food staples with imports – a precarious equilibrium. Other than charcoal, most other fuels are imported.

In regards to domestic ethanol production, Haitians are no strangers to the distillation of alcohol. Thousands of small mills and distilleries make beverage-grade ethanol in Haiti. In Léogâne alone, over 200 small distilleries were in operation before the earthquake (ESMAP 2007). Many of the existing distilleries in Haiti, those shut down or still in operation, could be repaired and refurbished to produce fuel grade ethanol. Project Gaia has been in contact with an operating distillery in the vicinity of Léogâne that could upgrade to produce hydrous ethanol fuel and put this fuel into the market in a matter of months.

Many opportunities exist for small scale distilleries. In Haiti, some small ethanol enterprises are already active thus presenting the perfect opportunity for value chain development through the support of SMEs (small and medium enterprises). The number of sugarcane transformation workshops throughout the country is an estimated 5,612 (ESMAP 2007)

Haitians rightly believe that Haiti’s way back from dependency is through agriculture and a renewed attention to domestic needs and markets. Therefore, by developing ethanol as a household fuel, it will profoundly benefit Haiti because Haitians can produce biofuels from their own agricultural crops. Moreover, Haitian families will finally have access to cooking fuel that is safe, clean, affordable and sustainable. A way back to economic - and human - health for Haiti is to produce ethanol for its domestic energy market.

Contributed by Crispin Pemberton Pigott


the described features are incorporated in the Saral Stove and Sampoorna Stove - as noted in the patent

Katene Kadji, is now manufacturing the Sewa Stove in Bamako, Mali.

The new Sewa Improved Charcoal Stove has a ceramic liner, and a painted metal exterior, with jiko style pot rests that put the bottom of the pot low enough to improve heat transfer to the tobt

The carbon finance company E+Carbon is using carbon credits to help Katene Kadji to be able to offer the stoves for 2,500 CFA francs (5.33 USD) as opposed to the original retail price of 3,500 CFA (7.47 USD).

There is a current case study of the Sewa Stove at the Gold Standard web site:
http://www.cdmgoldstandard.org/fileadmin/editors/files/1_case_studies/Mali_Cookstoves_Case_Study.pdf

There's more in the Hedon site:
http://www.hedon.info/View+Article?itemId=10411

The stoves design and principles are explained with simple sketchs. Many stove designs are existing, but most common designs are presented here.

**I am looking to get some Anila stove units in India for some small-scale trials http://biocharinnovation.wordpress.com/ - if you can help please get in touch asap with sarah.carter [at] ed.ac.uk**

Testing of the Sampanda stove in Cambodia 12.07.2010
Sarah Carter, UK Biochar Research Centre

See http://www.bioenergylists.org/content/testing-andersons-tl for a similar test on Anderson's TLUD, and http://www.bioenergylists.org/content/testing-everythingni for testing of EverythingNice stove, and Anila stove http://www.bioenergylists.org/content/testing-anila-stove.

Stove: Sampanda stove. Produced by the [Samuchit Enviro Tech Pvt Ltd](http://www.samuchit.com/) in India.
Test: A water boiling test (time to boil 2.5 litres of water, in a pan without a lid)
Location: The Iron Workshop, Siem Reap. A well ventilated building – 2 surrounding walls, and a roof. Wind conditions were low, but blustery at times.

I learned to make TLUDs from Dr. Paul Anderson when he came to do a stove & biochar demonstration for Biochar Ontario in June 2009. Since my primary interest was in producing biochar, I went home and began building a larger version of the “Champion” TLUD stove from a 55 gallon drum and a 25 gallon drum (pictured above.) I have been following this list since then and on “Dr. TLUD’s” urging, I thought should begin sharing with this community what I have been learning.

The “Large TLUD”

Essentially a "beefed up" version of the Champion TLUD Stove, my large TLUD has worked beautifully from the first trial run. The pyrolysis process is extremely clean in terms of visible emissions and can produce 25 – 30 liters (6 – 8 gallons) of biochar per run depending on feedstock. To halt the pyrolysis process to retain the biochar I have always used a watering can to quench the glowing coals. Two to four gallons of water usually does the trick.

Using this stove, I have pyrolyzed a number of different types of feedstock including: scraps of spruce lumber, pine needles, pine cones, pine bark, corn cobs, chicken litter, and hardwood sawdust pellets. The successful pyrolysis of the various feedstock has always depended on (no surprise here) having dry feedstock with pyrolysis times ranging from one to two + hours (again, depending on feedstock.)

Until recently I had been using a hardware store woodstove thermometer on the top of the stove.
I estimated pyroloysis temperatures to be in the 350-450 C range. I began using a 12vdc computer cooling fan to shorten run times and boost temperatures closer to 500 C. I recently acquired a temperature data logger and found, to my surprise, that temperature quickly shot to over 800 C with the fan. Even without the fan, temperatures in and above the pyrolysis front were between 600 and 750 C. The data from the first run with the data logger is attached. *Note:T1 is the thermocouple near the top of the inner fuel barrel just below the top of the feedstck and T2 is the thermocouple about 2 inches above the bottom of the inner fuel barrel.

My next steps are to monitor temperatures while experimenting with choking the primary air to different degrees and as I gain better control of pyrolysis temperatures, to (further) experiment with various types of feedstock. I am also working on a simple system to use the pyrolysis heat to dry feedstock.
I will post my results here.

Gustavo Peña, June, 2010

Buenos dias aqui te mando información sobre mis modelos, el primer modelo que elaboramos fue con la colaboración directa del Dr. e Ingeniero Larry Winiarski diseñador de la cámara de combustión Rocket, el Ing. Winiarski es muy conocido entre los que trabajamos con estufas ecológicas, puedes buscar los 10 principios de la combustión en internét, el problema que algunos de los que nos apasiona trabajar en el tema, no respetamos ni la mitad de estos pricipios y el resultado es catastrófica, hay muchas estufas no solo en mi país el salvador sino en el mundo entero que tienen una apariencia muy bonita, pero solo es maquillaje y lo peór de todo es que muchas organizaciones las construyen porque es mas un negocio para sus organizaciones que beneficio a la salud y al medio ambiente, gracias a los conocimientos del Ing. Winiarski a su ayuda personal y al apoyo financiero de StoveTeam International www.stoveteam.org he logrado desarrollar varios modelos que puedes ver en youtube aqui te mando los link y si necesitas mas información con gusto se las proporcionaré. Aquí te mando también el último modelo que acabo de desarrollar es la Ecko3 (por los tres quemadores) y los resultados de laboratorio de la cámara de combustión rocket

ecocina y salud el salvador
http://www.youtube.com/watch?v=R6Q_j2S1KUg

ecocia paso a paso
http://www.youtube.com/watch?v=2fmp23SdS2Y

reportaje en un canal americano
http://www.youtube.com/watch?v=STt1I8gRkp0

cocina escolar
http://www.youtube.com/watch?v=7AFq0PbYQcM

conina de 2 quemadores
http://www.youtube.com/watch?v=_IyVcH0FH_0

Pages

Subscribe to Improved Biomass Cooking Stoves RSS