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I have built the ELSA stove that's
documented here, https://www.youtube.com/watch?v=55r5DmvT3XE .

I started with a stainless steel trashcan that had seen better days. I
unrolled it and glued on ELSA stove blueprints from the web. Then I cut out
the shapes with a 24 tpi bimetal blade in a jigsaw.

I don't have an anvil, or the sheet-metal "curling" tool (is there a name
for it?) that is shown in the video. I bent the metal over some angle-iron,
and I made the tool from some stainless tubing I bought at the hardware
store.

I couldn't get the stove to light until I used the lighting cylinder, which
is shown in the video, for some extra draft. I used brown packing paper as
tinder, and wood pellets as fuel.

Small scale biochar production and use was discussed at the annual conference of the Engineers in Technical and Humanitarian Opportunities of Service (www.ethoscon.com)

An estimated 2.5 billion people worldwide cook their meals with biomass. ETHOS is an international group of individuals and organizations that promote improved cooking stoves for health, safety, and household energy. The Toplit Updraft or TLUD stoves are efficient and can produce biochar as a co-product of household energy.

Participants were interested in how biochars can be used to remediate soils and improve agriculture. Norman Baker, Sequim, showed how a 55 gallon TLUD can be used to make biochar for growing vegetables and improving nutrition. Paul Anderson (drtlud.com) described 12,000 TLUD stoves in India that product 10 tons of biochar each day. Users receive cash from selling the biochar to a German company, atmosfair gGmbH, which recovers carbon offsets for the energy savings and char to help fund the energy efficient cooking stoves. Art Donnelly, Seachar (seachar.org) demonstrated a new biochar making stove and described how biochar from cooking stoves has been used by coffee workers in Costa Rica. ETHOS participants are among the 1600 partners of the Global Alliance for Clean Cookstoves (cleancookstoves.org)

IFB stainless liner school rocket stove
IFB stainless liner school rocket stove skirt detail

On a recent trip to Haiti, I completed the first prototype of a new school rocket stove. This one has a 26 ga 330 stainless steel firebox liner, 2½" insulating firebrick walls, and galvanized steel outer shell. The skirt is 304 stainless inside, 1" ceramic fiber in the skirt floor and walls, and galvanized steel outer. The mouth and firebox are 6½" x 6½". The pot is 40 qts with the top diameter about 1/4" larger than the diameter near the bottom, and is imported. The locally available spherical bottom pots made skirt construction extremely difficult. We hope to someday produce this stove in quantity at a combined vocational school/stove factory.

steam pan charcoal stove
steam pan charcoal stove side bottom view
steam pan charcoal stove bottom with perforated lollipop air control
perforated lollipop air control closed

In my continuing quest to use readily available manufactured materials for stove construction, here is the steam pan charcoal stove with "perforated lollipop" air control. It is a 1/6 size steam pan (roughly 6" x 7" x 4" deep) inside a 1/2 size (roughly 10" x 12" x 6" deep) with 1" ceramic fiber board insulation between. The charcoal chamber is lined with expanded stainless steel to extend the life of the inner pan and improve air flow. Army surplus D rings are used for pot supports. Threaded rod for legs. It can be easily disassembled for repair. It has a small charcoal capacity like the BURN's Jikokoa (formerly Tank).
I plan to eventually build a two burner version in a full size steam pan.b

ammo box stovetop oven outer with insulation and stainless lining
ammo box stovetop oven inner with gasket and stainless splash plate
ammo box stovetop oven with door removed
ammo box stovetop oven complete

On my trip to Haiti in March 2016, I finished the ammo box stovetop oven. It is made with two ammo boxes, ceramic fiber board insulation, some stainless steel sheet, and various hardware. The oven chamber is 13" x 13" x 5". I plan to add split firebricks on the floor for use as a pizza oven. It fits on a household rocket stove but could be used over virtually any heat source.

Manufacturing is helping improve the lives of women and girls in East Africa with its efficient charcoal-burning Jikokoa™ stove and opportunities for women to participate in its workforce. The stove itself represents a step-change in the design and efficiency of charcoal-burning cookstoves. As well as being an aspirational household product, it cuts down on smoke and soot by more than 60% compared to the widely used Kenya ceramic jiko. But it’s not just women using the stoves who benefit. With all manufacture now done in a new state-of-the-art factory in Kenya, BURN emphasises that all jobs are open to both men and women at all levels – just over half of its workforce are women.

More about the 2015 International Ashden Award Winners
http://www.ashden.org/awards/2015/international

Easy Oven Retained Heat Cooker
Easy Oven Retained Heat Cooker w/ Rocketworks Stove

Jo Kennard in Australia has developed a retained heat cooker the Easy Oven, and has developed an excellent table of recommended cooking times and recipes to go with it.

Inspired by traditional Haybox cookers, and made from modern materials, the EasyOven saves between 86% - 90% of energy used while cooking meals, keeps food hot (or cold) for up to 3 hours. It was field tested during the Christchurch earthquakes and the Brisbane floods, and it is at home both in rural kitchens and in suburban potlucks. For More information see http://www.easyoven.com.au

sink charcoal stove
rebar inverted pyramid charcoal stove

The inverted pyramid rebar stove is ubiquitous in Haiti. Lots of radiation and convection away from the pot. No air control. Pot is often placed directly on the charcoal which quenches the charcoal and interferes with good radiative heat transfer.
I cut up a scrap stainless steel kitchen sink, built a sheet metal outer box, put in 1" of ceramic fiber board insulation, and added legs and pot supports. The inverted pyramid grate will have the legs shortened and be placed inside the "sink". A slide gate with sets of progressively smaller holes will be added to the "drain" for air control.

Small gas cooker using pellet biocarbon
Medium gas cooker burning pellet biocarbon
Medium gas cooker with pot and  'Vietnam Magic Fire'
Close up of Medium gas cooker"Vietnam Magic Fire'
pellet biocarbon
Shaped "anthill" biocarbon Briquette

After over 30 years of doing theoretical and experimental research, the authors of this document (Newtech Co., Ltd. in Quy Nhon city, Binh Dinh and Tan My Kim Co., Ltd. in Ho Chi Minh city, Vietnam), until now, have completed all not only modern but also cheap & user-friendly technology solutions which can help the poor all over the world do cooking by gas generated at their home without buying any drops of liquefied gas.

These technologies solutions can be developed in a country or in a big city or small town in any countries in the world, even it is in America, Europe, Australia and especially in Asia and Africa.

The authors believe that the modern but simple technology solutions stated hereby will start an era of a great revolution in cooking for billions of the poor all over the world and they hope that such technology will satisfy all poor persons.

The authors are very willingly to transfer these technologies to the countries in accordance with the international law in order to be together with such countries to help the poor all over the world.

Published on Mar 31, 2015

AIMS of the Eco-Kalan Project
To Improve the Health, Environment and Economics of Poor Communities

March 30, 2015

Dear Friends,
In the current video, I share with you the exciting developments from the partnership between the Eco-Kalan Project with the Negros Oriental Visayan Forum, the 79th Infantry Battalion and the 302nd Infantry Brigade of the Philippine Army in a livelihood program based on the Eco-Kalan and the Bingka Oven.

Since the Oct. 4, 2014 demonstration at Felipa Beach on Cooking with the Eco-Kalan and Baking with the Bingka Oven to members of SUMAPI Dumandan (http://youtu.be/RUYq7i1gQj4 ), we have learned and accomplished the following:

On December 14 -15, 2014, the Eco-Kalan Project and its partners
- set up an Eco-Kalan-C kitchen with Bingka ovens fired with wood and coconut shell charcoal and a traditional oven fired by wood for comparison; and
- officially launch the Eco-Kalan & Bingka Oven as a livelihood program for SUMAPI Dumandan under the Visayan Forum's umbrella.

In reviewing the interviews with SUMAPI members, guests and attendees at the launching, I learned about the limitations in the supply of coconut shell charcoal; restrictions in the production and supply of wood charcoal; and the seemingly unavoidable smoke when using wood as fuel for the Bingka oven. Smoke during baking can tarnish the appearance and taste of the baked product making it unmarketable.. And yet, wood is most often the fuel of choice when coconut shell or wood charcoal are not available or when wood is free for the picking.

I decided to make a clay stove which can function as a TLUD (gasifier) stove in phase 1 of the burn and as a charcoal stove in phase 2. That gave rise to the Whirly Pinay-S (2 kg wood capacity) and the Whirly Pinay-L (4 kg wood capacity) based on Kelpie Wilson's tin can Whirly Girl TLUD (Top Lit Upward Draft) stove. Our March 17, 2015 test runs with the large bingka oven using firewood in the improved Whirly Pinay (longer secondary air slits) produced clean, untarnished bingkas in all the 4 batches.

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