<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:x="urn:schemas-microsoft-com:office:excel" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 14 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--></head><body lang=EN-CA link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Dear Friends<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>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.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>It costs $1 locally to make the adaption, which is saved within 2-3 days depending on the weather.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>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.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>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.<span style='font-size:8.0pt;font-family:"Garamond","serif";color:black;mso-fareast-language:EN-CA'><o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>If there is interest a page can be developed for the BioEnergy site explaining the same thing in more words.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>The files are at:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial","sans-serif";color:black;mso-fareast-language:EN-CA'><a href="http://www.newdawnengineering.com/library/stoves/shatlil">www.newdawnengineering.com/library/stoves/shatlil</a><o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>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.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>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. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>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.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>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).<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>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.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>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.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Regards<o:p></o:p></p><p class=MsoNormal>Crispin<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>