[Stoves] Modified traditional Mongolian stove - pictures

[Ronald Hongsermeier]

Dear Crispin,
If it's okay with you, I can put the page and pictures in a .zip, 
tarball or 7zip file for anyone who has bandwidth-challenged connections 
or other problems reviewing the pics.
Merry Christmas!

Ronald von Nebendemkaltenkachelofen:/


On 22.12.2010 17:50, Crispin Pemberton-Pigott wrote:
>
> Dear Friends
>
> For a limited time I have placed some photographs with long file names 
> showing how to modify a traditional Mongolian coal stove. This 
> modification seems to reduce fuel use in the field by at least 20%, CO 
> by 50% and PM by 80%. If you are in an area that burns coal and needs 
> space heating (north Asia for example) you may want to have a look and 
> download all the photos (7 meg) for use later. Space is limited so 
> they will be replaced with other developments as time passes.
>
> It costs $1 locally to make the adaption, which is saved within 2-3 
> days depending on the weather.
>
> We found locally a stainless steel tube 63 x 1.5mm wall. It is cheap 
> enough to be a viable large scale option. The modification takes a 28 
> cm long pipe cut at 45 degrees on both ends.
>
> In the photos this is substituted with a rolled sheet of galv sheet 
> showing that it can be done with scrap steel if nothing is available.
>
> If there is interest a page can be developed for the BioEnergy site 
> explaining the same thing in more words.
>
> The files are at:
>
> www.newdawnengineering.com/library/stoves/shatlil 
> <http://www.newdawnengineering.com/library/stoves/shatlil>
>
> It shows how to modify the stove using bricks and clay (plus a piece 
> of pipe), how to light it using the End-Lighting Cross-Draft 
> technique, and how to refuel it. There are actually two ways to refuel 
> it -- the one shown is refuelling through the fuel door. It can also 
> be refuelled by opening the top of the stove to achieve the same thing.
>
> The power is variable, not just by changing the amount of fuel in it. 
> The combustion chamber can be narrowed with ordinary bricks. The stove 
> can be run in 5, 7, 11 and 13 kW configurations. For example tonight 
> it is -28 C and a small stove will be used wide open to give the 
> needed heat. In a week it might be -12 at night so the stove used 
> drops in 2 long bricks and continues to fill the (now narrower) fuel 
> area.
>
> In all cases the coal is ignited at the end where the outlet to the 
> chimney is located and the fuel piled towards the door. This layout 
> accomplishes a sort of sideways TLUD that can be refuelled without 
> creating smoke at the end or having to reload at the very end of the 
> burn. Hot coals and anything else that can burn is raked to the 
> chimney end and some wood tossed on top. Flames develop. New coal is 
> added between the fire and the door and the process continues.
>
> Two stoves have been made as a trial with a larger heat exchanger and 
> a slightly widened combustion chamber to make it easy for women to 
> install standard bricks (women do most of the stove bricking and 
> maintenance).
>
> The process of burning increases the burn time by about 100% and 
> moderates the kW so the gers (yurts) are heated more or less 
> constantly instead of a huge fire followed by rapid collapse.
>
> This work is supported in many ways by the Asian Development Bank, 
> World Vision, XacBank Mongolia, Dalkia, Mon-Energy, and other 
> organisations and individuals. Support is in the form of laboratory 
> testing, advertising, demonstrations, field testing and gathering 
> feedback.
>
> Regards
>
> Crispin
>
>
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