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Here is an example (hard to see of course because it is a still taken from a video) of the spinning of the flame caused by the shaped grate at the bottom.
The fire is circular because it is spinning rapidly, though pushed to the side by the way the fuel happened to be sitting. The spin adds turbulence without a fan and assists in keeping the flame away from the combustion chamber wall.
Here is a really cool picture of a Vesto burning walnut shells in TLUD mode.
Finally, here is a photo of a Vesto cutaway showing the inside parts in their correct positons.

Dear Marc and Ron and All interested in air flows

This is a response to questions about air and Marc’s tube.

Here is an old photo of secondary air entering the combustion chamber of a Vesto pushing the flame to the centre. This accomplishes the following:

Keeps the fire away from the wall, reducing the temperature it has to survive (a lot)
Keeps the flame going
Not allowing it to spread to one side away from the smoke on the other side that might otherwise ‘get away’.
Provides turbulent mixing of flame, hot secondary air and smoke
Allows for preheating to a significant degree (250-500 C)

The fire is circular because it is spinning rapidly, though pushed to the side by the way the fuel happened to be sitting. The spin adds turbulence without a fan and assists in keeping the flame away from the combustion chamber wall.

Here is a Vesto burning switchgrass pellets operating as TLUD, showing that there is nothing special about a TLUD in the sense of it having to operate in a particular fashion. The air flow through the fuel is reduced by the fuel and it operates as a TLUD. The secondary air is send across the surface to keep a deck of flame going at the height of the holes. This obviates the need for adding a circular disk at the top to ’keep the flame going’. Adding a ‘concentrator’ as Paul calls it takes more material and moves the fire too far away from the heat of the pyrolysis bed leading to unwanted flame-outs from time to time. A major issue with all pyrolysing TLUD’s. It is simply not necessary. Just keep the fire near the fuel. This also provides additional vertical space for the flame to finish burning before getting to a cold pot surface.

Finally, here is a photo of a Vesto cutaway showing the inside parts in their correct positons.

The primary air controller is the ring with holes in it. When the handle is moved to the side the holes are closed.Air Max

Open Space is a concept to give freedom to the people. Within minimum given place, people would have access to Fire to cook (good stove), have access to food, water for drinking, source for light (apart from stove, some light from solar powered lamps), place for communication and networking with others and a place for reading books, news papers, etc. These type of "Open Spaces" would be kept in public places, especially for the poor people to access all the above facilities..

Open Space was designed by Dr. N. Sai Bhaskar Reddy..being facilitated under the theme "Be-Cause".. for the urban poor people...
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The ETHOS conference will be January 25 - 27, 2013 in Seattle and it looks like we have another great conference. The conference will include

- Update on the Global Alliance and their activities
- Standardizing Reporting on IWA Indicators
- Stove Performance Inventory, Sharing Public Data, and Establishing Common Data Formats
- Update on ISO Process
- Updates on Protocol Developments.

Its not too late to get your abstracts in and give talk. Please send your abstracts directly to Dean and I.

For more details, to register, and to submit your abstract the conference web site is http://www.vrac.iastate.edu/ethos/conference.php.

More information and registration: http://www.vrac.iastate.edu/ethos/conference.php

Forum on Clean Cookstoves and Fuels will be held in Phnom Penh, Cambodia from March 18-22, 2013.

Proceedings are Posted

  • A Progress Report
  • Presentations and notes from plenary, breakout, and intensive learning sessions
  • Posters displayed during the poster session
  • Photos taken throughout the week
  • An updated participant roster

Link to the Forum Proceedings: https://unfoundation.box.com/CleanCookingForum2013

Forum on Clean Cookstoves and Fuels were held in Phnom Penh, Cambodia from March 18-22, 2013.

The Forum will focus on methods to drive innovations in research, market development, standards and testing, policy development, and other topics. The first day (March 18th) will feature in-depth topical workshops topics such as gender, finance and health. The following three-days (March 19-21) will include sessions with thematic tracks in areas such as project development, fuels, standards and testing, financing, research, and capacity building.

For more information see

or email: forum@cleancookstoves.orgNike Air Force 1 07 White Bicycle Yellow White AH0287-106 – Buy Best Price Adidas&Nike Sport Sneakers

A loaded kinyanjui type barrel kiln carbonizing maize cobs
free fuel!
a full kin of maize cob and branch charcoal made in less the a day
the maize cob charcoal cooks with high heat and little smoke.

Four very good reasons why to make your own charcoal from dry maize cobs.

  1. They are FREE!! (minimal processing required and are widely available as a farm waste product)
  2. Maize cob charcoal is very easy to make and leaves few charcoal fines. (no need for expensive briquetting)
  3. They are easy to light and burn very hot with little ash and are perfect for cooking a quick meal.
  4. Using maize cob charcoal means ZERO reliance on tree's and forests, LPG gas or unreliable and expensive electricity supplies for your cooking fuel needs. And with a Cookswell Jiko you can bake, boil, roast and toast all of your favorite foods

Air Jordan 1

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fuel briquette, bird seed briquette

Multiple uses for fuel briquettes..This is in from Nora Feldmar who, as part of her advanced degree in Holland, is introducing briquettes to an active Gypsy community in Hungary:

cheers all,

Richard Stanley

I have been looking into hand and foot powered tools and machinery for working sheet metal and light gauge sections. Attached is the presentation I've put together so far. It is a work in progress.

read the full pdf:
http://stoves.bioenergylists.org/files/metal_working_tools_and_machines.pdfAdidas Yeezy shoes

Quad 2 Stove

Paul Anderson, Centre for Research in Energy and Energy Conservation (CREEC)

The Centre for Research in Energy and Energy Conservation (CREEC) is a not-for-profit organization which works “to enhance access to modern types of energy through research, training and consultancy”.

The CREEC offers independent stove testing services, and has recently tested the Quad 2 Stove.

For the full test report and method see the pdf:

The center tested the Quad 2 Stove and found that:
The Quad stove boils 5L of water in 27 minutes. To boil and simmer 5L of water, it uses 636g of dry wood and has an energy use of 11713kJ. It has a thermal efficiency of 42% during the high power phase and 41% during simmering. It has a turndown ratio of 1.4, an indication that the stove’s firepower can be controlled for different cooking regimes. Its fuel use is considered to achieve significant, measurabe health and environmental goals according to the Lima Consensus Tiers of stove ranking.

With regards to safety, the stove scored 77.5% and is rated GOOD and is considered a Substantial Improvement according to the Lima Consensus Tiers of stove ranking.


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Understanding Stoves Book Cover

Understanding Stoves is book about stoves written by Dr N Sai Bhaskar Reddy. This book is declared as 'Open Knowledge', Published by MetaMeta, Netherlands

http://www.metameta.nl/ link found in Home PageΑνδρικά Nike

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