Stoves-Cookers

The Stoves Discussion list has been sharing information to improve cooking stoves since 1996. We use this site, to keep track of the many types of stoves, their designs, and the progress that has been made to improve them, and spread efficient cooking stoves in world wide.

Use the stoves menu to narrow the list of stories to the type of stove you are interested in.

  • Art Donnelly, December, 2010

    Mas que Cafe (on YouTube)

    (Produced, shot and edited by Majo Calderon & Carlos Herrera
    http://www.biodieseldiaries.com )

  • D. Ariho, P. Tumutegyereize and K. Bechtel, Uganda December 2010

    The Project was concerned with the evaluation of the energy efficiencies of commonly available biomass
    fuels in Uganda in a “Champion-2008” Top Lit Updraft (TLUD) gasifier stove. Selected biomass fuels included; Eucalyptus wood from plantations, maize cobs (agro-waste), papyrus, spear grass, noncarbonized briquettes (agro-waste and sawdust) and off-grade jatropha seeds. Moisture content
    measurement of biomass fuels was determined using oven-dry method. The energy efficiencies of the
    biomass fuels in the “Champion-2008” TLUD gasifier stove lied between 12 and 19%. Maize cobs had the highest energy efficiency of 18.40% and spear grass had the lowest of 12.64%. Maize cobs and papyrus were not significantly different from Eucalyptus wood. Non-carbonized briquettes and off-grade jatropha seeds had a higher operation time compared to the rest of the selected biomass fuels though faced with a problem of higher starting time but able to perform when started. The results obtained indicate that a variety of biomass fuels in Uganda can perform well in the “Champion-2008” TLUD gasifier stove, thus the need for adoption to combat deforestation problem.

    See the attached report
    http://www.bioenergylists.org/files/BIOMASS FUELS IN A TLUD GASIFIER STOVE.pdf (in pdf) for more detail.

  • From Art's Preface:
    Buenas,
    Just a quick note from Costa Rica. Our Estufa Finca (a large TLUD) team is two weeks into preparing for a 10 week pilot project. Working with SALTRA and a program at the Universidad Nacional de Costa Rica, we will be installing 50 , locally produced stoves with migrant coffee bean pickers.

    I want to side with Paal on this very important point. Our stoves can have the best looking numbers in the lab. But if people won't use them it doesn't make much difference does it. The stove design we are using has been jointly developed by myself, my Central American partners (esp. the women who are building them APORTES), but most esp. by listening very carefully to the people who we hope to benefit. Much of the feed back has been in regard to the fuels issue. These people do not have access to chips or pellets, we are not going to get them to make briquttes, etc... so instead we have given them a fuel chamber easy to load with sticks, sugar cane bagasse, etc. and powerful enough to cook for the typically large extended families. This process stared in August 2009, there are currently 20 of our stoves being used in CR and Nicaragua, the feedback has been very positive. The pilot project is simply a continuation of that process. We are going to be using the KPT version 3.0 protocol, with some customization to monitor 30 stoves. All of us on the team are looking forward to adding more TLUD based stoves to our line. But this approach is showing us what will get used in the real world.

    File attachments: 
  • Harry Stokes, IIEA and Project Gaia

    The International Institute for Ecological Agriculture (IIEA) and Project Gaia
    invite you to attend

    Seminar Announcement (in pdf)


    The Appropriate-scale Alcohol Fuel Production Seminar:

    Global Solutions for Cooking, Refrigeration, Electricity and Transport

    (see pdf for detail).

    Monday, November 29 - Thursday, December 2, 2010

    Embassy Suites, Atlanta, Georgia, USA

  • Christa Roth and Christoph Messinger, August 2010

    Existing Charcoal Stove

    Existing Charcoal StoveImproved Charcoal Stove

    Improved Charcoal Stove

    Improving the Charcoal Stove for Haiti, Stove Camp 2010 (see the Stove Camp Summary for challenge details)

    Main points mentioned at the end of the Stove Camp Workshop

    1. We need a high turn down ratio.

      To bring water and foods fast to the boil, we need high power in the heat-up phase.
      However, thereafter we commonly need low power for simmering. The stove
      therefore needs to offer the opportunity to turn down the power output drastically.
      Options:

      1. Regulation of primary air supply (e.g. closing door)
      2. The gap between pot and charcoal is increasing over cooking time (shape of char container provides more depth = increased gap to the char)
      3. c) The amount of char available at the end of cooking is reducing (conical shape of char container = less char over time available)
    2. We need to reduce heat losses to the bottom and to the side of the stove.

      A char container radiates heat to all sides – not just to the pot. To reduce the amount
      of char used, it is important to reduce the heat losses to the other directions.
      Options:

      1. Bottom of stove: rebounding plate (with holes) in between primary air supply
      2. intake and charcoal container. Thus primary air is channeled through the
      3. heated rebounding plate, taking some heat back into the char container.
      4. Side of the stove: double wall with air in between for insulation.
    3. We need to maximize heat harvest from a given amount of charcoal.

      Charcoal burning is mainly influenced by the amount of air available in the char
      container.
      Options:

      1. A vertical spacer in the center of the charcoal container (Lanny Henson’s pig tail”) seemed to increase the availability of air for charcoal combustion.
      2. Additional draft (e.g. forced air) may increase heat generation per time unit. However, this may also increase CO emissions and reduce efficiency of char use.
      3. Secondary air to burn off the CO in a gap between the charcoal and the pot may provide additional heat. However, for this to be beneficial it may not impact on the surface area available for direct radiation from the charcoal to the pot and should not cool down the air in the gap (well preheated secondary air).
    4. We need to maximise heat transfer to the pot.

      Generating as much heat as possible out of a given amount of charcoal is one step.
      But another important step is to make sure that most of this heat actually is
      transferred into the cooking pot.
      Options:

      1. “Sunken pot” concept seems to provide best results in terms of heat transfer (Henson stove). Unfortunately, in real life this might not be possible in many work environments.
      2. Best heat transfer is NOT achieved if the pot rests on the char. Optimum is about 1inch away from the char, not closer than that. For Simmer, this could increase to 2-3 inches.
      3. A skirt is highly important to shield the gap area between the pot and the char against the influence of wind. The gap between pot and skirt should bedetermined.

    Christa’s Summary of the stove camp

    Observation and necessary action Derived Design Principles
    Charcoal radiates heat to all
    sides: as much can radiate
    towards the bottom of the stoves
    as can radiate upwards towards
    the pot.

    Action:
    Avoid loss of radiating and
    conducting heat from charcoal
    that is not directed towards the
    pot.

    • Add space between the charcoal grate and other stove parts: Lift the charcoal grate slightly off the bottom of the stove and increase the space to the sides of the stove.
    • Limit the places where the hot grate can conduct heat to other stove parts.
    • Add a deflector plate between charcoal chamber and the stove bottom to radiate heat back upwards.
    • Insulate the stove bottom to prevent heat loss through the bottom.
    • Insulate sides of the stove.
    • Regain heat through air circulation (air cooling of stove) by passing air through heated stove parts thus preheating air entering the combustion system. This can be by passing primary air through the deflector plate below the grate and/or secondary air through a gap between double side walls of the stove.
    Charcoal combusts in function of the available oxygen. Thus heat generation is a function of
    air supply to the charcoal grate.

    Action: get the right amount of air to the charcoal grate. To little will choke the combustion, too much will cool the flue gases.

    If power of the stove is too low, increase air supply by

    • making more holes in the grate.
    • adding a ‘Henson pig-tail’ vertical air-pass through the charcoal bed.

    Do not pile the charcoal up too high, as this will restrict air flow through the charcoal bed (this is influenced as well by the shape and particle size of the charcoal chunks).

    The combustion of charcoal goes from oxidizing C to CO, then in
    a subsequent step from CO to CO2.

    CO is a toxic gas and has still considerable energy value. Ensuring a complete combustion
    will increase energy output and reduce toxic emissions.
    Action: avoid CO emissions.

    Charcoal radiates heat but there is also considerable convection of hot flue gases.
    Action:
    Optimize transfer of created heat into the pot.
    Avoid obstructions between the radiating charcoal bed and the bottom of the pot (increase
    the view factor of the charcoal seeing the pot).
  • 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!

  • 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

  • Art Donnelly, SeaChar.Org June, 2010

    It was not quite 9 months ago, when I sent out an email to a small group of collaborators, with a Subject line that asked the question: "How do we get biochar stoves to Central America?" Of course, like the punch line to the old vaudeville joke, the answer is "lots of hard work". I could not have imagined 9 months ago was how rewarding all that work would feel. I want to share that feeling with all of you.

    I recently returned to Seattle from Costa Rica's famed coffee producing area the Santos Zone. This was my second trip since mid- January. I have been continuing my work as a technical consultant to a clean stove/biochar project. Proyecto Estufa Finca (Farm Stove) was initiated by organic coffee farmer Arturo Segura http://www.solcolibri.com/ and the members of the local citizens group APORTES.

  • Jock Gill, May 2010

    With one can: I can make a stove I can cook a meal I can make biochar I can be carbon negative I can start to change the world

    This iCan is made from a 7" tall pineapple juice canThis iCan is made from a 7" tall pineapple juice can

    I took a 7" tall pineapple juice can, removed the contents, and then marked it thusly:

    1. A line around the can 1/3 from the bottom --- this is the top of the fuel load

    2. A line around the can 1/3 from the top -- this is the line for the secondary air holes

    The middle section is for the wood gas buffer to insure pyrolysis, not combustion.

    Next

    Primary air supply for a 7" tall pineapple juice canPrimary air supply for a 7" tall pineapple juice can

    Marked the bottom of the can off into 8 equal sections. I then used a nail set to make 8 equally spaced holes about half way between the outside of the can and its center. I made a 9th hole in the center. Not too big -- about 1/2 way down the small nail set shaft.

    Then I used the line1/3 down from the top to locate the secondary air holes.
    I made 8 equally spaced holes with the small nail punch and then used the the biggest punch to enlarge the holes to the full width of its shaft.

    At this point I removed the top of the can completely. I left it on for the best structural integrity while I was punching holes.

    Done. The All-in-One TLUD is complete. Very simple. Just 17 holes in the right places in one can.

    More pictures, are also available at: http://www.flickr.com/photos/jockgill/sets/72157624142002304/
    and click here for more story details: http://www.bioenergylists.org/node/2827

  • From Stuart Conway and Rogerio Miranda

    Hola companeros,

    Mandanadose un reporte algo grande, pero de interes sobre el trabajo que hice Rogerio y Winrock introduciendo una estufa tipo Justa pero modificado para Peru, la Inkawasi

    Download the Complete Report PERU HEALTHY KITCHEN_HEALTHY STOVE PILOT PROJECT

  • Testing of the Anila stove in Cambodia 03.05.2010
    Sarah Carter and Vichida Tan, 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.

  • Testing of the Anderson TLUD in Cambodia 27.04.2010
    Sarah Carter and Vichida Tan, UK Biochar Research Centre

    Similar tests have been carried out on the Anila http://www.bioenergylists.org/content/testing-anila-stove and EverythingNice stoves http://www.bioenergylists.org/content/testing-everythingni.

  • Paul Olivier, April 2010

    Today we put in operation for the first time the 250 gasifier with a stove top.
    This gasifier has a single 2-inch pipe that vents housing air to a warmer grate.
    This pipe had no butterfly valve or other restriction.
    We used the same small 80x80 mm fan as in the 150 gasifier.
    This fan had no problem at all supplying air to the reactor and to the 2-inch pipe.
    The burn lasted almost an hour on rice hulls, even though the height of the reactor was no more than 70 cm, the same height as in the case of the 150 stove.
    The warmer grate had sufficient heat from the housing to fry an egg, as indicated in picture 855.
    We obtained a bright blue flame, as shown in picture 865,
    although the camera did not have the right lighting to display it properly.
    The stove top was not properly reinforced when a large pot filled with water was placed on top.
    There was a deflection of a few mm's.
    However this can be easily remedied with two more lateral braces underneath the stove top.
    In conclusion, the 250 gasifier works well and delivers an enormous amount of heat.

  • [MAGH 3G]( http://e-magh3g.blogspot.com/ ) is an adaptation stove. All types of biomass, briquettes and charcoal can be used for cooking. This is an all in one stove.

    It was found that many families have at least two or three types of stoves in rural areas for using types of biomass as fuel. Now with just one stove they have the freedom to use all types of Biomass as fuel.

    There is an option to control primary air, to control air from the fuel feed side opening, and secondary air (while using TLUD adopter). Weighs less than 2 kgs, 9 inches in height and 7 inches diameter. Most convenient for regular use, travel, relief, refugees, etc. Reusing metal sheet, these stoves are completely hand made. The cost of each stove piece is $5 (USD).

    This stove is being facilitated under the "Good Stoves and Biochar Communities" Project, implemented by GEO with the support of GoodPlanet.org This is one of the 40 stoves designed by Dr. N. Sai Bhaskar Reddy, GEO http://www.e-geo.org http://www.goodstove.com/ . For more details visit http://e-magh3g.blogspot.com/

  • TLUD Vesto Grasifier
    Crispin Pemberton-Pigott, New Dawn Engineering, Swaziland, April 2, 2010


    Dear Roger and TLUD Fans (the other kind)

  • Paul Anderson, Paul Oliver, and Alexis Belonio March 2010

    See the Power Point Slide Presentation 4 MB (ppsx)

    or the PDF file http://www.esrla.com/pdf/gasifier.pdf (almost 5 MB)

  • Andrew Ma, March 11, 2010

    Minimalist, most accessible and, lightest wood gas stove I've seen or built so far. (But got a few more ideas). Credit goes to WorldStove and its Everything Nice Stove design.

    Instructions

  • Report on TLUD Discussions at the 2010 ETHOS conference
    By Christa Roth and Kelpie Wilson
    Submitted 8 March 2010

    There was a good showing of TLUD technology at the annual ETHOS Stoves conference in Kirkland, WA, USA on January 29-31, 2010. This report covers some of the discussions about TLUDs that took place at conference sessions.

    Dr. Paul Anderson, a.k.a., “Dr. TLUD”, made the pitch for TLUDs and biochar throughout the conference. He brought a large collection of 20 different TLUDs. Most were simple homemade devices made from “tincanium” (Dr. Anderson’s Friday evening presentation on the wonders of “tincanium” was delightfully humorous). TLUD designers Art Donnelly, Christa Roth, and Hugh McLaughlin all had stoves on display. Anderson had one example of a mass produced TLUD that is manufactured in India.

    About 30 people attended the TLUD community discussion session. To get an overview and discover who had which type of specific interest, the participants were asked to raise hands on which aspects of application of the TLUD principles they were interested in. The following aspects were identified:

    * Applications: is the main focus on cooking, biochar, or a combination of both?
    * What are appropriate sizes? TLUDs exist for 2 cups, 2 liters, 5 l, 20 l up to 5 gallon, 20 gallon, 55 gallon. The interest in producing biochar is driving design of larger TLUDs.
    * Natural draft or forced air. If using forced air, what are the implications of different power sources: grid, Thermo Electric Generator (TEG), battery based electricity
    * Emissions (indoor, outdoor, any)
    * Fuels (types of fuels, sizes and densities)
    * Locations (which continent, urban, peri-urban, rural environments)
    * Materials for TLUDs (ceramics, metal)
    * What price range is acceptable? (developed country, developing countries)
    * What can we as individuals and organizations do to advance TLUD technology?
    * What are the future prospects of TLUD technology?

    Participants at the TLUD session participants made a list of TLUD features as compared to other stove types such as the rocket stove:

    * Makes biochar
    * Starts fast, boils water very quickly, and burns a long time on one load of fuel
    * Less attention required for fuel input (no continuous stoking of the fuel needed), increasing freedom for the operator/cook
    * Fuel flexible – uses small size waste that cannot be burned in other stoves
    * Cleaner than other kinds of stoves, with low Black Carbon (BC), Organic Carbon (OC) and CO
    * Variety of scales and applications from cooking to metal forging, including barbecue, grilling, frying, heating, lighting
    * Lightweight, portable and modular; can use multiple units to control heat output
    * Easy and cheap to build from tin cans or sheet steel. Dimensional tolerances are not stringent
    * Low temperature operation. Pyrolysis temperatures are below 500 degrees C, resulting in less combustion chamber burnout
    * Suitable for fireplaces that are not allowed to burn open fires any longer
    * Safe for indoor space heating with flue exhaust
    * Can be an inexpensive add-on to existing stoves for specialized applications (e.g. water kettle in addition to a plancha stove) and to take advantage of small sized fuels not suitable for a rocket stove

    A few TLUD problems/challenges were also identified:

    * Lack of turndown ratio
    * Lack of emissions robustness. More emissions on startup and sometimes on shut down.
    * Changing fuel form factor when adding new fuel can cause stalling.

    The group discussed in detail the following ideas for advancing TLUD development:

    **Materials:** light-weight ceramics are not necessarily needed for insulation of the combustion chamber, unlike in a rocket stove, as for TLUDs the temperature in the fuel bed stays at ambient temperature until the pyrolysis front passes through. Then temperatures get higher. The open flames are not within the combustion chamber but above the fuel bed. The hottest parts of a TLUD stove are the concentrator disk and the bottom of the fire chamber, where the remaining charcoal might be burnt creating high temperatures (if the char is not dumped out and conserved for other use e.g. as biochar). Ceramics are cheap to fabricate, e.g. consumable stove components like the concentrator disk or the bottom plate of the fire chamber. Options for modular stove designs containing ceramic parts to be explored further. A huge gap between standard pottery and industrial ceramics was noted.

    **Production and Dissemination:** Stoves should come as a kit: combustion chamber + pot stand/application + snuffer box for the char to be saved.

    **Economics of charcoal:** The saving of char could become more popular if the produced charcoal were attributed more value (carbon offsets for biochar used in the soil, charcoal fines to be processed into charcoal briquettes, water filters etc.)

    **Modular advantages:** TLUDs excel on high power output, e.g. boiling water, but don’t turn down the power so well. The concept of having a different and/or smaller combustion unit for the simmering stage or replacing the continuous heat addition with a retained heat cooker should be explored further. Modular systems could use a number of TLUD burners under a large pot or grill. If cooking lasts a long time, such as firing a grill at a restaurant, you could replace spent TLUDs with new ones to keep the heat going while you recharge spent TLUD’s with new fuel.

    Despite the advantages of the TLUD there are very few stove programs using TLUDs. Here are the ones we know about:

    * The BP Oorja stove, now called FirstEnergy, distributed 400,000 units in India, but there exists little feedback on the campaign.
    * Phillips had a TLUD stove and planned a major roll-out in India to start late 2009, but no up-to-date info is available.
    * Nathaniel Mulcahy of World Stove is manufacturing institutional and household size stoves in Haiti (uses a pyrolytic gasifier technology similar to TLUD); allegedly building over 100 units per day with plans to upscale and add a fuel production unit for grass pellets. This is a very interesting project in the limelight, with high potential to create worldwide awareness. To be observed.

    Other than those listed above, there are no projects yet at a major scale. Participants observed that this was a ‘chicken-and-egg’ scenario: Donors only want to roll out ‘already proven technologies’ but nobody apart from major companies like BP or Phillips has the money to do the research needed to prove the technologies. Funding is needed for research to get the combustion chamber to the application stage and to collect user feedback on a major scale.

    The group felt there was a strong need to get more experience on the ground building and cooking on TLUDs. In Uganda this year a TLUD-project with World Bank funding will start. Funding has been secured for 2 years. More projects are needed.

    What participants committed to do:

    * Cook on a TLUD. Several people have been making TLUDs, but very few have been cooking on them. Some people volunteered to use a TLUD for cooking for a given time, like a month, and blog about the experience. More volunteers are needed to do this.
    * Create awareness and knowledge about TLUDS.
    * Paul Anderson committed to put a TLUD handbook on the web.

    Upcoming TLUD events include a Combined Heat and Biochar event in Massachusetts on 9-13 August (contact Paul Anderson for more details) and the annual Stove Camp at Aprovecho, 26 to 30 July. Dean Still, organizer of the Aprovecho Stove Camp has said the camp will focus on the TLUD this year.

  • Jock Gill, March 2010

    Here I show the 4th can used in the P80 design. It is a 1 quart paint can.
    I believe the holes are unnecessary and will try a new can tomorrow. This
    can acts to collect and focus the thermal energy in a 3" diameter column.
    Works very well.

    Can #1 is the 3 lbs Costco burn pot with 4 lbs of softwood pellets.

    Can #2 is Weber charcoal chimney used, in this case, to make charcoal, not
    burn it.

    Can #3 is the second Costco can that will go around the the focusing can an
    support the "gas drip pan" and gas grate.

    So the p80 design has two inner cans and two outer cans. The outer cans stay
    relatively cool and help keep the heat in the system.

    Read more, with pictures

  • Jock Gill, March 2009

    For the most recent updates see: http://www.flickr.com/photos/jockgill/

  • Holey Roket: A Biomass Briquette Stove
    Rok Oblak, Slovenia, June 2009

    See Rok Stoves
    and Fuel Briquette Burning at Stoves Camp 2008

    The Holey Roket technology promotes using biomass briquettes and their hole as the key feature of an efficient cooking system. The flames coming in the combustion chamber are condensed within a small space (scheme) providing higher heat output and therefore better combustion of toxic gasses like Carbon Monoxide (CO).

  • Jock Gill, Pellet Futures / Biochar NE Medford, MA March 4, 2010

    Jock has been adding to this design, for the most recent updates see: http://www.flickr.com/photos/jockgill/

  • Crispin Pemberton-Pigott and Roger Samson, February 2010

    Please click Read More for a set of photos showing the construction of a prototype 125 mm diameter Grasifier Stove burning Switchgrass Pellets provided by Roger Samson (REAP-Canada).

  • Paul Anderson, February 21, 2010

    For the first time at one Internet location, the basics of "Top-Lit UpDraft" (TLUD) micro-gasification are available along with numerous links to source documents. This "TLUD Handbook" is a "draft for
    discussion" and this is the 2010 copy of the Handbook.

    Paul

    Paul S Anderson, Ph.D. -- aka Dr. TLUD ("Dr. Tee-lud")
    Biomass Energy Consultant with BEF, & Partner in Chip Energy.
    Specialist in micro-gasification.
    Office & Res: 309-452-7072
    www.chipenergy.com
    http://stoves.bioenergylists.org/andersontludconstruction

    File attachments: 
  • From Willie to Richard: A Family of Tincanium Stoves
    Paul Anderson,Hugh McLaughlin

    A Power Point Presentation presented at the 2010 ETHOS Conference. It is a bit "tongue in cheek."

    Enjoy!

    Paul
    --Paul S Anderson, Ph.D. -- aka Dr. TLUD ("Dr. Tee-lud")
    Biomass Energy Consultant with BEF, & Partner in Chip Energy.
    Specialist in micro-gasification.
    Office & Res: 309-452-7072

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