There are some wonderful comprehensive overviews of clean cooking stoves on the internet.
These are a few great resources.

The GiZ Energypedia Cooking Energy Technologies and Practices https://energypedia.info/index.php/GIZ_HERA_Cooking_Energy_Compendium

and an excellent comprehensive report of Microgasification Technology compiled by Christa Roth
Micro Gasification Cooking with Gas from Biomass (pdf)

Global Alliance for Clean Cookstoves Catalog of Clean Stoves
http://catalog.cleancookstoves.org/
and the Partnership for Clean Indoor Air report on clean cooking stove types (pdf):
www.pciaonline.org/files/Test-Results-Cookstove-Performance.pdf

HEDON (Household Energy Network) Stoves Database:
http://www.hedon.info/Databases

Dr TLUD - Comprehensive TLUD resource
http://www.drtlud.com/

Find out more about the Eco-Kalan project here: http://www.eco-kalan.com/

February 3, 2014

Dear Friends,
On December 27-28, 2013, the Eco-Kalan Project Team led by Monica Sison and the Philippine Army (302nd Infantry Achiever Brigade in Tanjay, Negros Or.; 303rd Infantry Brigade in Murcia, Negros Occ,; and 62nd Infantry Battalion in Sagay) went on a relief mission to Purok San Pedro Beach in Barangay Old Sagay, Negros Occidental, Philippines*:

a) to distribute relief food supplies and clothing collected by Monica from a Catholic school where she is teaching, the Social Action Team of the Catholic Diocese of Dumaguete, and ONCAN (Oriental Negros Children Advocacy Network); and

b) to train 150 persons in the set up and use of the eco-Kalan from Barangay Old Sagay who were worst hit by Typhoon Haiyan (locally called Yolanda). These trainees would become the demonstrators at eco-Kalan presentations in their barangay in the New Year. Of the 150 persons selected by Barangay Old Sagay officials, only 35 were from Purok San Pedro Beach.

Purok San Pedro Beach is a coastal village where fishing is the main livelihood. It is also the poorest of the typhoon devastated areas in Old Sagay. Since Typhoon Haiyan (Yolanda) hit the eastern Visayas on November 8, 2013, little aid has reached this purok. The typical relief food package given to a family was 3kg of rice, 2-3 little cans of sardines and 2-3 packs of noodle soup -- a single day's meager provision for a family of 2 adults and 4 little children. Poor families extended the number of days they ate from this food aid by cooking the rice as lugaw -- i.e., rice boiled in lots of water.

Preferential access were given to the 150 trainees from the different puroks throughout Barangay Old Sagay by means of a ticket to relief food and clothing, eco-kalans and to food cooked from an uncovered eco-Kalan kitchen. This was perceived as an unfair distribution of relief aid in Purok San Pedro Beach where there are many poor and hungry children. I was still in Canada when I saw the photos of the December 27-28, 2013 relief mission to Old Sagay, one of which was that of a little boy holding out a tiny piece of paper purporting it was his ticket that entitled him to a meal. I realized then that the barangay approach to giving relief aid had to change to the purok level. It was then when I decided to establish a covered eco-Kalan kitchen and feeding center in Purok San Pedro Beach with the capacity to feed its entire population of about 2,000.

On January 9, 2014, with support from the 302nd Infantry Brigade, the Eco-Kalan Project sent a Philippine Army truck loaded with building materials for the construction of a covered Eco-Kalan Kitchen and Feeding Center in Purok San Pedro Beach. Purok officials, the Eco-Kalan Project and the 302nd Infantry Brigade agreed to the inauguration of the kitchen and feeding center and presentation of eco-Kalans to the entire San Pedro Beach community and neighboring Punta Roma for January 25, 2014. Photos and the YouTube video of the inauguration will be posted by mid-February 2014.

A similar installation and inauguration of an Eco-Kalan Kitchen in Lacawon Island in Cadiz Viejo, Negros Occidental is scheduled for February 10, 2014.

Warm regards,
Rebecca Arrieta Vermeer
Eco-Kalan Project in the Philippines
Felipa Beach, Mangnao
Dumaguete City, Negros Oriental

*Philippines→provinces→cities & towns→barangays→puroks

PBS put together a nice video about the efforts to improve cooking stoves around the world:

There's more information on their web page: http://www.pbs.org/newshour/bb/building-cleaner-cookstoves/

Nancy Hughes and Gustavo Pena were highlighted with StoveTeam International. http://www.stoveteam.org/

Radha with the Global Alliance for Clean Cookstoves did a nice job outlining development challenges.

And there were a fair number of stoves that were included in the broadcast but not mentioned by name. I saw Envirofit, Burn Design Lab, Prakti and a few others represented. Let me know which ones I missed. :-) at erin@trmiles.com

Christa Roth has updated the GIZ HERA Micro-gasification Manual
https://energypedia.info/wiki/File:2014-03_Micro_gasification_manual_GIZ...

It is extensively revised, and features good -clear descriptions of essential cooking stove topics, e.g. choosing appropriate fuels, cooking stoves and technologies.

She highlights all of the major micro-gasifier cooking stoves, and includes a new section on biochar, with good, clear graphics and descriptions for how to use biochar.

An essential reference for everyone's cooking stove library, and this is all work supported by the German people through GiZ, we appreciate their support of Christa's amazing work.

Paal Wendelobo was an absolutely dedicated champion of clean cooking stoves, and the people that rely on them.

From his son:
"For almost 30 years, Paal brought attention to health and environmental issues connected to cooking and household energy for development countries. Paal found other people, later friends, with similar ideas and thoughts in this stove community. Despite arguments about stove design, function, and whom had the better stove. No doubt he was a pioneer, teacher but also he was a student."
"His simple Peko Pe stove invited people think new. He was also a pioneer of TLUD stoves."

He died with family a few days ago, and we'll miss him.

for more about the Peko Po Biomass stove: http://www.pekope.com

Great half hour television program explaining Rice Hull Gasifier Stoves, and their potential in Vietnam.

It includes a good comparison of different stove types and designs, and interviews with people using the stoves.

Same video, the Vietnamese version:

Notes from Paul Anderson
Gustavo has presented a very nice video of the use of a tall TLUD gasifier under a DUAL purpose stove frame (frame = stove structure without the heat source) that first boiled 5 liters of water in 12 minutes, and then converted into a plancha stove with chimney, cooking papusas (related to tortillas). Total cooking time 1 hour 45 minutes on one batch of wood chips/chunks (5237 grams) that yielded 1300 g of char. 25% weight yield of char. Probably could have operated an additional 10 minutes with pyrolysis fire and a slightly lower percentage yield of char.

Note: That is approximately 4000 g of fuel of pyrolytic gases (including moisture content that was probably near 15%). Any ash content (probably 1% of the raw fuel) remained in the char.

For a comprehensive resource for TLUD stoves, see Paul's web site: http://www.drtlud.com/

The stove was developed by Adrian Padt and Aidan Oosthuysen, and Richard Pocock, and uses a familiar Rocket design surrounded by a wire cage to improve the stove's stability and reduce burns. It's a smart looking stove, it saves women time and energy in gathering firewood, and it has lower emissions than the solutions it is typically replacing.

Lighting instructions:

The Rocket Works Stove, web site http://www.rocketworks.org/

• The Rockt Works stove is a high efficiency wood burning stove, designed to accommodate multiple fuels when required.
• It is smokeless after initial combustion, thereby reducing the likelihood of carbon monoxide poisoning and reducing the emission of black carbon particles.
• The outer cage remains cool to touch even after hours of cooking, due to our innovative design.
• It is made from high quality, heat resistant stainless steel allowing for years of regular use.
• It can boil 5 liters of water in 15 minutes using as little as 250g of wood, which is significantly less than traditional cooking methods.
• Its thermal efficiency is 45%, for the Large Pot High Power, performed by the SeTAR Thermal Efficiency Test.
• Its emissions are the best in its class.

Basic Specification:

• Mass: 2.95Kgs
• Height: 270mm
• Diameter : 240mm

Lighting instructions in English:

ublished on Dec 20, 2013

December 20, 2013

Dear Friends,
A few weeks after Typhoon Bopha (locally Pablo) struck eastern Mindanao in December 2012, I was introduced electronically to a Filipina doing graduate studies in Saskatoon, Saskatchewan, Canada.. This young Filipina was fundraising for her home province of Davao Oriental in Vancouver but I was only able to contact her after she returned to Saskatoon. When she learned about the Eco-Kalan, she lamented at the thought of "so much rice donated to the typhoon victims but nothing to cook it with". Her lament has echoed in my mind ever since and has made me more determined to bring the Eco-Kalan stoves to victims of disasters wherever possible, not by ourselves, but with other organizations that can provide security, reliable transportation, food, drinking water, clothing and building supplies.

When Typhoon Haiyan (or Yolanda) made landfall on Leyte on November 8, 2013, we immediately advised the Emergency Response Team at the Negros Oriental Governor's Office; the Department of Social Welfare and Development in Dumaguete; and the our main partner, the 302nd Infantry Brigade of the Philippine Army, of the Eco-Kalan Project's interest to join relief missions to typhoon ravaged communities. Tacloban, Leyte and the northern islands of Cebu were quickly saturated with NGOs and security became a problem so our Project accepted the assignment to Cadiz and Sagay on northern Negros Island where little or no aid had been received. The Eco-Kalan team met with local barangay officials for Cadiz Viejo, Lacawon Island and Old Sagay to assess the needs there and took photos for documentation. We also made plans for an Eco-Kalan demonstration and distribution of relief food and clothing in Cadiz Viejo for Lacawon and Cadiz typhoon victims on December 7; and later in December for Old Sagay victims to allow time for the reconstruction of a covered area on school ground. At each Eco-Kalan demonstration, an Emergency Eco-Kalan-C Kitchen is set-up with 10 stoves; and 150 householders are trained in the set-up and use of the Eco-Kalan. These trainees become the demonstrators at the Eco-Kalan presentations in January 2014 for 670 households from Lacawon Island and Cadiz Viejo; and for the 500 or more of the 2,082 affected households in Old Sagay,depending on donations we receive, . Lacawon Island will be given 5 Eco-Kalan-C to set-up an Emergency Kitchen of their own. The Emergency Eco-Kalan-C Kitchen is an essential and necessary component of our demonstrations and presentations as nothing appeals more to the poor and hungry than the delicious aroma of the food we cook on the stove they are given.

Regarding the pots and woks we use in the Emergency Kitchen, the Barangay Councils for Cadiz Viejo, Lacawon and Old Sagay have requested the donation of a 48-L pot ($55) for the beans; a 33-L pot ($47) for the rice and a 25" diameter wok ($63). All three utensils can be purchased in Dumaguete for US$165 and could be presented to the 3 communities at the January 2014 Presentation. I will be happy to receive your donations.

The Eco-Kalan Project is most grateful to the 302nd Infantry Brigade for creating a place for the Project in relief missions to Typhoon Haiyan (Yolanda) victims; for packing hundreds of eco-kalans; and for transporting these stoves and kitchen equipment and supplies from Dumaguete on the southern tip of Negros to the Sagay base of the 303rd Infantry Brigade on the northern tip of Negros Island. We give thanks to our new partner, the 303rd Infantry Brigade for security and transportation service and assistance at demonstration events in Cadiz and Sagay. We are deeply touched by the generosity of the Dumaguete citizens who sent donations of food and clothing to all Yolanda disaster areas and thankful to our partner, ONCAN (Oriental Negros Children's Advocacy Network) for ensuring that the affected communities of Cadiz Viejo, Lacawon Island and Old Sagay receive a share of the donations.

I believe we, stovers, have a vital role in humanitarian relief missions. It is my hope that many more of us will be drawn to this type of activity.

Warm regards,

Rebecca Arrieta Vermeer
Eco-Kalan Project in the Philippines
Dumaguete City, Negros Oriental

Potential Energy http://www.potentialenergy.org/ stoves are the stoves original designed in the Berkley labs for Sudan (the Darfur region). They are an energy efficient stove designed with the cook's needs in mind.

They have recently added an orange 'cool mesh' to the outside of their metal stove to help protect the stove user (and their children) from burns. The second photo is of a stove field test, where ladies in Africa can see for themselves the advantages and disadvantages of several designs.

The Berkley stove is created out of metal and then shipped to local artisans who assemble the stove in the field. This video shows part of the process.

I agree that burning wood and other fuels like that is not what the rural people of the world should be saddled with forever. They need the kind of cooking fuel I have.

But for now, we can really help them have healthier lives and less menial labor. There is no contradiction between helping out now with better wood stoves and knowing that their governments, central and local, must do more as quickly as possible to improve their access to good energy, water, housing and all the rest.

We are happy to bring our stove to the Maasai. We have 100% "sustained adoption" and the attached photo shows why. Yes, someday they will be much better off, we hope, and not need this sort of thing. But for now, to see Rhoda, cooking some beans with her grandchild on her lap, safe and smoke free, is a motivating image that makes us proud and happy.

Bob Lange
Maasai Stoves and Solar

http://www.forstoves.com/what-we-do/maasai-stove/
and http://internationalcollaborative.org/about-us/impact/

The use of biomass fibers used as binders of a charcoal matrix --all done at ambient temperatures and at pressures generated by a simple hand press (12 to 15 bars) -and there are many such options– is certainly a viable alternative to boiling up starch or sugar on one end or purchasing the mechanized press and consuming the energy to generate the higher temperature/pressure for lignin melting. I will being the samples to the stoves camp to show what kind of densities can be achieved by infilling a properly processed fiber matrix with such as charcoal fines but I find it puzzling that this alternative now active in 67 nations globally, escapes mention.

Richard Stanley

Attached is my BINGKA OVEN fired by an Eco-Kalan-C using charcoal (oling) made from coconut shells. I have used charcoal as fuel as it burns clean. I have used firewood also but the soot that is formed inside the oven tarnishes the looks of whatever is baked in it. In the Philippines, there are many men and women who use the traditional “hornohan” for their home-based businesses of making bingka (sweet rice cake with coconut), tortas (breads filled or plain) and cakes made of cassava, ube, wheat and sweet rice. In most cases, one does not earn enough to pay for the medical costs of treating illnesses such as cancer, eye and skin infections and lung diseases which result from long term exposure to smoke and intense heat. By reducing fuel consumption and exposure to radiant heat and by removing the smoke from the cooking environment and immediate neighbourhood, the BINGKA OVEN can bring better health and higher living standards to poor families in the Philippines.

Estremera Nova, Bunyola, Illes Balears, Spain htttp://www.cuinessolars.jimdo.com

Marc Ayats Plana has been working on TLUD stoves and improved low thermal mass ovens. This TLUD powered low thermal mass oven was inspired by the Anderson's Recho Rocket Oven, and uses a Champion style TLUD heating stove to power the low thermal mass earth oven.

For Marc's excellent writ-up download the pdf TLUD-OVEN Description
These are some quick notes:

He has made some changes to the TLUD style oven

• Increased primary air draft, which can apport enough oxigen to burn the charcoal generated during the gasification process and continue giving heat to the oven. Now the primary air enters around the lower perimeter of the reactor, instead of having a single inlet tube like in the original model.
• Increased the length of the riser, which also sustains the diffuser. This extra extension allows the complete combustion of gases gasification to completely remove the visible smoke in the oven.

• TLUD Reactor. Diameter: 20cm. Total length: 30cm. Fuel Height: 20cm
• TLUD Outskirt. Diameter: 22cm. Diameter central hole: 10cm. Total length: 25cm
• TLUD Riser and diffuser. Diameter: 12 cm. Total length: 30cm. Diffuser: granite piece 2cm thick and 15cm diameter
• Fuel load: 3.38Kg pellets

The Low Thermal Mass oven is based on the Haiti Rocket oven http://www.rechoroket.com
To see more pictures of the TLUD oven and the process of construction go to:
http://cuinessolars.jimdo.com/forns/

In the Oven Temperature graph, you can see the complete temperature profile. Marc did a side by side comparison of both a 20cm reactor TLUD and a smaller TLUD, with 12,5cm reactor.
"Note: the temperatures refers to the inside side of the wall oven, half way between the baking surface and the top hole. Note2: the temperatures were taken by a temperature datalogger and a type K probe."

Marc's Notes and TLUD size comparison are copied here:
Notes about 20cm TLUD test

• 8 minutes to get 200 ° C
• 17 minutes to get 250 ° C
• 1h17minutes to peak at maximum temperature: 298ºC
• In 1h30m from start the flames extinguished and began the char gasification
• In 2h30min from start the temperature dropped definitely below 200 º C
• It has been spent a total of 3.38 kg of fuel. The price of 15kg of pellets is 6 € approx. Therefore, the price of this oven batch was 1.35 €.
• On average, consumption was 22.5 g of fuel per minute.
• No visible smoke appeared at any moment of the process.
• The outside temperature was 32 º C
• Just for testing, 2 loaves of bread were cooked with a total weight of about 1 kg, occupying a total of about 35 minutes. In total, I could have baked around 5kg of bread in the 2.5 hours of operation.
• The bread was cooked optimally. Although, maybe the temperature was a little higher than the desired one in most bread recipes (in general, we can say that bread needs a temperature of 250ºC the first 5-10 minutes but then lows to 180- 200ºC for the rest of the baking process)
• A lot of heat went out of the upper hole of the oven. Maybe this tends to cool the oven.

Comparison between different TLUD sizes

• The power of the TLUD is proportional to the area of the reactor. So, in theory, the 20cm diameter TLUD (314cm2) should give us 256% more power than the 12,5cm diameter one (122,7cm2).
• The experimental results are more or less confirming the theory, as the average temperature and the maximum temperature are about 220% of that of the 12,5cm one.

Table of Experimental Results:

It looks like a TLUD gasifier of the right size can power a low mass oven. Marc notes that more study is needed, but the right combination of oven and TLUD could make an energy efficient clean baking oven for family and/or community use.

References

• http://www.rechoroket.com
• http://www.drtlud.com
• http://www.cuinessolars.jimdo.com

To help encourage more people to start small business bakeries in East Africa we are proudly partnering with to offer comprehensive packages for starting up a small business. They include training on how to use a charcoal oven, baking tins, mixing bowls, business plans, internet registration and even an apron and a hat!

Classes are held just outside of Nairobi past Kikuyu or we can arrange to come to your location (in East Africa).

Learn how to bake healthy cookies, pizza, sweet potato bread, cakes, bread rolls and even roast peanuts to make peanut butter!

Contact cookswelljikos@gmail.com for more information.

Now available internationally from www.cookswell.eu (Cookswell Nederlands) - original, handcrafted Kenyan designed energy saving charcoal convection ovens - bake, roast, toast or steam all of your favorite foods using just a tiny handful of charcoal.

Support local Kenyan innovators and a young Dutch businessman and you can save money, save energy and eat well with a Cookswell Oven.

Eco-Kalan has adapted their Binkga Oven (named ofter the rice cakes that the ovens make) to use both locally available coconut charcoal and stick wood fuel.

The system uses the same oven bottom, and two different covers, one for wood and one for charcoal. Both ovens can bake high quality Bingka rice cakes, but with two different levels of particulate emissions. (Notice the soot on the wood fired oven). However, both ovens are cleaner than the hornohan stove that Eco-Kalan would like to replace.

The Bingka Oven works over a range of cooking temperatures (325 deg. F - 500 deg F) and has can cook both bingka and torta breads (with or without filling). Rebecca is anticipating that it will also work for a wide variety of other baked goods.

They have demonstrated the oven for local parents, teachers, government officials, and others. They have also reached out to people who work with remote communities that in the mountains. The first commercial production will target bakers who are preparing the bingka and torta on the more common and smokey hornohan stoves and anticipate the newer stove will give these bakers the ability to make high quality good with lower costs and improved health.

See the attached files for details.

A Chef from São Paulo, who built a carry on rocket pizza oven, and sell gourmet pizzas on the streets of São Paulo.

And Rogério's Ecostove

For more about the EcoFagoa see http://www.ecofogao.com/

TOASTER SLOT BRIQUETTE STOVE
I have been designing some briquette burning stoves for El Fuego del Sol, which is making square fuel briquettes from paper, cardboard, and sawdust in Port au Prince, Haiti:
https://sites.google.com/a/elfuegodelsol.com/elfuego/
The stoves are loosely based on rocket stove principles. My latest stove is inspired by the toaster. Briquettes are like thick pieces of bread. For good combustion they need to be surrounded by air and slightly separated from each other and the liner wall. This design holds 4 briquettes in two vertical slots of expanded stainless steel. As they burn down, new briquettes are added through insulated swinging door flaps.
Wrapping new briquettes in a sheet of paper before insertion ensures quick ignition and minimal smoke production.
Air comes in the front and bottom and can get to all sides of the briquettes. The insulated doors block much of the radiant heat from the upper briquettes from escaping out the front and keep briquettes from rolling out of the stove.
The liner will be surrounded with insulating bricks and have a galvanized steel outer shell. There will be a pot support frame and sheet metal pot skirt at the top.
The concept should also work well with round briquettes and dung fuel.
The liner will be surrounded with insulating firebrick and a galvanized steel shell. There will be a pot skirt.

Cookstoves Future Summit, November 20 - 21, 2014

http://www.cookstovesfuturesummit.org/

Some highlights include:
The Importance of Scale: Transforming the Way Half the World Cooks in our Lifetime
Moderator – Kathy Calvin, President and CEO, UN Foundation
Gina McCarthy, Administrator, US Environmental Protection Agency
Hanna Tetteh, Minister of Foreign Affairs and Regional Integration, Ghana

Clean Cookstoves and Fuels: A Necessary Ingredient in the Growing Ecosystem for Energy Access
Kandeh Yumkella, Chief Executive, Sustainable Energy for All
Keith E. Hansen, Vice President, Global Practices, World Bank Group
Alexander Aleinikoff, Deputy High Commissioner, UN High Commissioner for Refugees [invited]

Driving a Market for Clean and Efficient Cooking Solutions: The Supply Side
Moderator – Bajjiahtu Abubakar, National Coordinator of Renewable Energy Programme, Ministry of Environment, Nigeria
Jennifer Pryce, Chief Executive Officer, Calvert Foundation [invited]
‘Tokunboh Ishmael, President, Alitheia Capital
Allert van den Ham, Chief Executive Officer, SNV
Carlo Figà Talamanca, CEO, Sustainable Green Fuel Enterprise

For the full agenda, visit: http://www.cookstovesfuturesummit.org/agenda/.