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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for more Biomass Cooking Stoves, News and Information see our web site:
http://www.bioenergylists.org/
[email protected]
http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org
