Emissions

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.

ETHOS Lighting of the stoves
CREEC, Aprovecho Sam and others at ETHOS 2015
StoveTec TLUD with a toasting marshmallow
StoveTec Stove - new Colors
Christa Roth sitting near the StoveTec stoves
Peter Scott and others ETHOS 2015
Kirk Harris TLUD
Rocket Works Stove ETHOS 2015

ETHOS Cooking Stoves Conference in Kirkland, Washington January, 2015.
for more about the next ETHOS Conference see http://www.ethoscon.com/

The ETHOS conference brings together people involved in stove design, dissemination, and testing from Universities, Government, and Non Government organizations, and has themes around the topics of improving cook stove design and performance, reducing emissions, and improving stove adoption, but listening to the needs of the people using the stoves. It ends with the 'lighting of the stoves' which is a demonstration of some of the cooking stoves that people have talked about in the conference.

In addition to capturing photos of the stoves, this year I captured a few pictures of the crowd of attendees comparing stove designs, toasting marshmallows, etc.

The big green stove is the InStove institutional rocket stove http://instove.org/

The lovely people taking pictures were from CREEC ( Energy and Energy Conservation ) which presented a great analysis of current cooking stove tests and some insights to improve them. They also noted that fans typically fail in Uganda, and there are no fans available to replace them.
For more about CREEC see http://creec.or.ug

StoveTec and Aprovecho presented some interesting innovations in stove design that they hope to field test in the coming year. The light green stove has an insulated top door for adding fuel to their TLUD style stove. The purple stove is their rocket stove that has been optimized for improved particulate emissions, with an improved set of colors.
For more about StoveTec stoves see http://stovetecstore.net/
for more about Aprovecho and stove testing see http://www.aprovecho.org/lab/index.php

I was happy to get a good picture of Christa Roth of GiZ her handbook of MicroGasification is outstanding, to download a copy go to https://energypedia.info/wiki/File:Micro_Gasification_2.0_Cooking_with_g...

File attachments: 

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/

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:

Institutional Stove Solutions - InStove

Aprovecho's larger stoves - the instiutional stoves group, have now branched out and become

Institutional Stove Solutions (inStove)

http://instove.org/

They are using the same rocket stove, and have perfected a 60L stove for institutional stove.

They are focusing on schools and other institutions, and have attached an autoclave for hospital and clinic use.

They've found a way to do "Stove factory in a Box", and have perfected a way to build the stove with local labor, and with all tools provided in the factory box and requires only a small generator to operate long term.

Umang Maheshwari, Greenway Grameen Infra

The Greenway Smart Stove is an insulated metal stove, that appears to be a rocket style design with bakalite handles and a metal pot rest and fuel rest. You can see more details in the Greenway Smart Stove flyer.

This stove is marketed as an improvement over the mud Chulha, which is familiar in India.

The Low Smoke Chulha has been enabled by Philips Design in close co-operation with NGOs, self-help groups, local entrepreneurs and potential users. Low Smoke Chulha provides a safer home environment for families, reduces the risk of respiratory illness, and supports indigenous ways of cooking. The Low Smoke Chulha is not only smokeless but also helps every household save 10 kilos of firewood each house each day which is 4 tones of firewood a year!

See our page: http://www.lowsmokechulha.com/

Erin Rasmussen, Revised June, 2011

A few months ago Crispin Pemberton-Pigott suggested that we put together a chart of the sizes of various particles that are small enough to inhale and cause problems in the lungs. It was a great idea, and here is the result.

Gustavo Pena, Stove Team International
and Larry Winiarski

This is a Hybrid Combustion Rocket, TLUD stove designed for practical use with the help of Larry Winiarski, and with Gustavo Peña of Stove Team International.

See also:

Tom Miles, ETHOS Conference 2011
Kirkland, Washington, USA January 28th ~ 30th, 2011

The ETHOS Stoves Conference was last weekend, and it included demonstrations by some of the stove makers and manufactures, with the opportunity to talk to the people using and inventing the stoves.

Here are some of the stand-outs from the demonstrations area, click on an image to view it in a larger size.

The Shark Stove presented by John and Flip Anderson. Notice the even cooking on the pancakes, that even heat is partially due the ceramic shark teeth construction just under the cooking surface. This is primarily a stick burning stove with both a plancha (even cooking surface) and pot rests.

Jatropha Seed TLUD (Top, lit, updraft design, using natural draft - no fan) by
Pamoja (http://www.pamoja.net/protree_jatropha.html) and Jet City Stoveworks ( http://jetcitystoveworks.com/ ). Abely demonstrated by David Otto.

Paul Anderson dexterously burning Jatropha seeds (out of doors) in the Woodgas Stove ( http://woodgas.com/bookSTOVE.htm ) designed by Tom Reed. This is a light weight gasifying stove (minus the pot rest in the picture) that uses a small electric fan.
Boiling water in the Charbelle, presented by Peter Scott. The Charbelle is a Charcoal cooking stove designed by the Burn Design Lab ( http://www.burndesignlab.org/our-stoves/ ) for use in Haiti.

This stove features an abrasion and thermal shock resistant ceramic liner surrounded by sheet metal cladding. The stove is currently being mass produced and sold in Kenya. The stove has been very well received, earning top marks from consumers.



Ryan with StoveTec was demonstrating the StoveTec Stove ( http://www.stovetec.net/us/ ) an Ashden Award winning cook stove that can either be used with stick wood or charcoal.

The institutional version of the StoveTec Stove for use in schools and other organizations, has an attached chimney and an a pressure cooker version. The pressure cooker is useful to shorten cooking times, and the fuel consumption, when cooking beans and small grains.

The Nomad PrePac ( http://www.preppac.net/ ) Bio-fuel Camp Stove burning stick wood. This is an ultra-light stove designed to burn small amounts of fuel for camping or for emergency preparedness.

the PEMS emissions testing was happening at ETHOS (of course), Larry Winiarski is in the background in these pictures.

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