Stove Designs

Aprovecho / ProBEC Ashden Awards Video available On-Line
Jeremy Roth, Aprovecho

160 grams of charcoal boils and simmers 5 liters/CF04 Stove
Lanny Henson www.lanny.us July 2, 2006

The CF04 Stove boiled and simmered 5 liters using only 160gr of charcoal and wood.

After several modifications to 4 different prototypes, it only took 150 gr of lump charcoal with 11% moisture and 10gr of wood to boil 5 liters of 83 degF/28.3 degC water in 45 min. That is 32 grams per liter to boil and simmer. At 1 hour after boiling the water was still simmering at 100 degC and after 2 hours the water was 205degF/96 degC. At this point I shut the air control and capped the pot module to stop the airflow and retain heat.

At 3 hours the water temp was 190 degF/87.8 degC and was 178 degF/ 81 degC at 4 hours.

Fuel Efficient Wood Stoves and Hayboxes: Efficiency of Combustion, Operator Expertise, and Heat Transfer Efficiency (1996)
By Dean Still, Jim Kness, Bradley Billetsen, Gabriel Cox, Michael Espenan, Jean Baptiste Nael, Danielle Nicholas, Meera Subramanian, Daniel F. Zettler
Aprovecho Research Center, July 3, 1996

Good summary on stove efficiency by Aprovecho in 1996.

28.06.2006
Today CEDESOL signed a contract with the GTZ for the first 1,000 improved stoves in their project titled “Stoves for a Better Life: Implementation of a Strategy using Ecological and Improved Stoves for Residences.”

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CO/CO2 Ratio in the Charcoal Stoves Tested at Aprovecho (pdf)
Dean Still, Aprovecho Research Center, June 23, 2006

The following graph plots the levels of CO and CO2 during one test each of the charcoal burning rocket stove and Jiko-type charcoal stove from Ghana. A higher level of CO2 suggests a higher burn rate of fuel.

It can be seen that even though the CO level for the rocket drops below 10 ppm, the CO2 level remains high suggesting a high firepower continues. The Ghana charcoal stove has a lower level of CO2 with a considerably higher level of CO.

Big Improvements For Small Cooking Stoves: The Benefits of Heat Recycling
Crispin Pemberton-Pigott, New Dawn Engineering, January 2004

ETHOS CONFERENCE 31 Jan to 1 Feb 2004

These days so much is known about combustion that efficient and nearly complete
combustion can be basically taken for granted, even if the knowledge has not been put into
practice. Combustion geeks now focus to making incremental improvements in the removal
of unwanted combustion products, largely PICs and CO.

Comparing the Charcoal Burning Rocket and Jiko Stoves (pdf)
Dean Still and Nordica MacCarty, Aprovecho Research Center, June 22nd, 2006

The charcoal Rocket Stove was compared to the Jiko-type charcoal stove sent from Ghana. 600 grams of Kingsford charcoal was placed in the stoves under the Aprovecho emissions hood. One test was performed on each stove for preliminary studies. The stoves are compared in the following graph for carbon monoxide emissions during a cooking task (to boil 5L of water and simmer 30 minutes).

Building Solar Cookers in Hands-on Course (pdf)
Second report filed by Ethos/CEDESOL team - Summer 2006 CEDESOL

This is the second in what we hope to be a series of "weekly" reports by the ETHOS team working with CEDESOL in Bolivia this summer (northern hemisphere). Their first report is located at http://bioenergylists.org/en/node/527

Reducing Indoor Air Pollution through Improved Cookstoves Dissemination: The Case of Patsari Stoves in Rural Mexico
in PCIA Bulletin Issue 7, June 2006

Ollas Solares
Iniciativa Mexicana de Aprendizaje para la Conservación

Ollas Solares
Iniciativa Mexicana de Aprendizaje para la Conservación

Instructional Video "Building a VITA Stove"
Jeremy Roth, Aprovecho Research Center, June 13th 2006

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The Garlington Wood Gas Stove
Ray Garlington 2003

[img_assist|fid=478|thumb=1|alt=The Garlington Wood Gas Stove]

Center Fire Stove 01 Cooking Test
Lanny Henson, June 12, 2006

In the last cooking test, the Center Fire Stove 01 needed only 750
grams/1.65 lb of pine chips to cook 8 pounds/3.63 kilograms dry weight of pintos. That is 14 liters of volume with water or 104 servings-35 gr/ 1/2 cup cooked volume (1/4 cup dry weight) servings.

CO Emissions from a Charcoal Rocket Stove
Dean Still, Aprovecho Research Center, June 12, 2006

CO Emissions From a Charcoal Rocket StoveCO Emissions From a Charcoal Rocket Stove

Crispin Pemberton-Pigott, New Dawn Engineering, Swaziland, June 12, 2006

3 Laterit and Charcoal Dust3 Laterit and Charcoal Dust

Dear Friends

I fired two of the rings today for a brief time, perhaps 3 hours at temperature. No particular care was taken regarding the slow initial temperature rise.

Pema Pot Skit
Jigme Rangdrol June 10, 2006

Pema Pot SkirtPema Pot Skirt

There seems to be actual agreement that pot skirts make combustion stoves better.
It is clear however that the bulk of deployed stoves do not have pot skirts.
Therefore an inexpensive pot skirt that could be made in the third and fourth world for those deployed stoves would have some usefulness.

The mass production of insulated bricks for Six Bricks Rocket Stoves means that there are many broken bricks. Everyone wants these broken bricks.

The Sprocket Rocket was the idea and creation of Mary, one of our stove promoters and teachers. Seated here on the right she is demonstrating how to wire together SixBricks.

The half bricks are wired together in the same fashion.

Some people use insulated bricks only for the top half.files/images/sprocket5_0.jpg

Here is a top view showing the sprocket sitting on three stones with six insulated half bricks on top of the sprocket. I

Charcoal burning in the Sprocket Rocket.

Like the SixBricks Rocket Stove, the owner can finish her stove any way she likes.
files/images/sprocket8_0.jpg

The Sprocket Rocket (pdf) (Uganda)
Ken Goyer June 4, 2006

Ken Goyer describes the "sprocket rocket" charcoal stove and its use in Uganda.

This is a bicycle sprocket. I was visiting a camp near Lira and this woman came along holding this sprocket. She said that she was planning to make a Sprocket Rocket and that she had paid 1000 shillings (about 54 cents) for it.

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Lanny Henson June 4, 2006

This modular stove is built from used metal containers.

It has a center fire burner module, a sunken 8-liter pot module, and an insulated/ chip drying top cap.
The burner and is made from an institutional food can. It takes all the ware and stress from the fire protecting the rest of the stove body.They are easy to build and can act as fuel cartridges to store fuel for quick and easy use.
The burner module, under development, adds secondary combustion air to the top of the burner.

Lanny Henson's Center Fire Stove 01Lanny Henson's Center Fire Stove 01

El Proyecto Patsari diseñado por Omar Masera (CIEco, UNAM) y Rodolfo Díaz (GIRA) ganó el PRIMER LUGAR EN LA CATEGORÍA DE SALUD Y BIENESTAR los Premios Ashden Awards para la Energía Sostenible.

Depues GuerreroDepues Guerrero

El Proyecto Patsari diseñado por Omar Masera (CIEco, UNAM) y Rodolfo Díaz (GIRA) ganó el PRIMER LUGAR EN LA CATEGORÍA DE SALUD Y BIENESTAR los Premios Ashden Awards para la Energía Sostenible.

Depues GuerreroDepues Guerrero

Manual clay ring forming machine for making the combustion chamber of a small single-pot Rocket Stove.
New Dawn Engineering
Crispin Pemberton-Pigott June 2 2006

Lanny Henson May 27, 2006
www.lanny.us

Henson Center fire, simple tin can wood gas burner cartridge module.

Lanny Henson, May 26, 2006
www.lanny.us

Center fired cartridge burner modules for wood and charcoal.

UNA GUÍA SIMPLE PARA CONSTRUIR LA ESTUFA JUSTA
Aprovecho Research Center

Cómo construir una estufa con chimeneas de uso eficiente
de combustible de nueva generación.

La estufa Justa fue desarrollada a través de los esfuerzos coordinados de centroamericanos,
la organización Árboles, Agua para la Gente, el Club Internacional
de Rotarios y el Centro de Investigación “Aprovecho”.

Texto: Peter Scott
Ilustraciones: Tony Wiley, Brian Thomas y Ethan Hughes
Traducción al castellano:
Amado Lascar & Jesús Sepúlveda
Para mayor información sobre la estufa Justa o para obtener asistencia en el diseño de una estufa propia para su comunidad, por favor contáctenos:
Aprovecho Research Center

Stove Camp 2006 August 18

Construcción de la Estufa Justa (English and Spanish)
Jim Wilmes, Una-Familia, Trees Water and People

Step By Step Instructions for building a Justa stove by Jim Wilmes, Unafamilia, volunteer for Aprovicho and Trees Water and People

Lasting Impacts of a Solar Cooker Project in Bolivia (pdf)
Melanie Szulczewski, Ph. D., Solar Household Energy, Inc. April 2006
Photos and editing by David Whitfield x Director - CEDESOL Foundation cedesol@gmail.com

[img_assist|nid=377|title=Cedesol Solar Cooker|desc=|link=node|align=left|width=400|height=300]

Under the auspices of the French NGO Bolivia Inti, alternative energy experts David and Ruth Whitfield introduced solar cooking to many villages in Bolivia between 2000 and 2003. After demonstrating solar cookers in public forums, they then trained those people expressing interest in how to make and use solar cookers.-

Lasting Impacts of a Solar Cooker Project in Bolivia (pdf)
Melanie Szulczewski, Ph. D., Solar Household Energy, Inc. April 2006
Photos and editing by David Whitfield x Director - CEDESOL Foundation cedesol@gmail.com

[img_assist|nid=377|title=Cedesol Solar Cooker|desc=|link=node|align=left|width=400|height=300]

Under the auspices of the French NGO Bolivia Inti, alternative energy experts David and Ruth Whitfield introduced solar cooking to many villages in Bolivia between 2000 and 2003. After demonstrating solar cookers in public forums, they then trained those people expressing interest in how to make and use solar cookers.-

Here is a series of photos of the open source paraffin stove being made by New Dawn Engineering. Not shown are the external tank and hose which can be any suitable size or material. It is an FSP stove by type, which is a 'gravity stove' operating at a slightly elevated pressure but without a pump or compressed tank.

This stove is self-extinguishing if tipped over and features a high flame temperature, low CO emissions, excellent stability and robust construction. All the parts are separately replaceable. The frame is mild steel flat bar and the other parts are stainless steel save the screws. The CO/CO2 ratio is particulary low at less than 0.05%. The heating power is 600 to 1800 watts varied by the brass control valve. The pot rests can be changed by the user. The basic unit without the top deck can be bolted under other devices like baking ovens or water heaters.

The fuel consumption is about 6 or more hours per litre on high and 12 hours turned down to 'half'.

Prototype Staff House Kitchen Assembly Kit Stove with Pot Rests
Christa Roth, GTZ/IFSP Mulanje, Malawi, May 19, 2006