<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: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 12 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>At ETHOS 2011 Sam Bentson and Ryan Thompson of Aprovecho made an interesting presentation on their test of charcoal burning stoves. they did 5 Liter Water boiler Tests for about 7 stoves. Each stove was tested 7 times. Stoves included as Jiko, Lao Bucket (GERES, Cambodia), Okela(?), Recho Mirak (Haiti), Mali, and Prakti (india), Pulumusa, Stovetec (Aprovecho) and Jikopoa (Burn Design Lab). <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Christoph Messinger from GIZ noted that their average fuel consumption of 200 g per test was half what he had experienced (400g ) in the field in Southern Africa with charcoal stoves. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>The reason for the low fuel use may be apparent when their presentation makes it onto the ETHOS website. <o:p></o:p></p><p class=MsoNormal>http://www.vrac.iastate.edu/ethos/proceedings.php<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>In the meantime has anyone seen a difference this great between the lab and the field? <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I wondered if part of the difference may be partly due to the quality of the fuel, i.e. differences in volatile and ash content. Aprovecho used lump hardwood charcoal from Bimart (Royal Oak). Are there any studies of the proximate analysis (volatile carbon, fixed carbon, ash. MC) of charcoals in developed and developing countries? <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Tom <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Tom Miles<o:p></o:p></p><p class=MsoNormal>tmiles@trmiles.com<o:p></o:p></p><p class=MsoNormal>www.trmiles.com<o:p></o:p></p><p class=MsoNormal>sotves.bioenergylists.org<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>