<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: Arial; font-size: 12pt; color: #000000'><style>p { margin: 0; }</style><div style="font-family: Arial; font-size: 12pt; color: #000000"><style>p { margin: 0; }</style><div style="font-family: Arial; font-size: 12pt; color: #000000">Yesipov, Tom; Yury; Manuel; 2 lists<br><br>1. Thanks to Tom for providing (below) most of the answers for Yesipov. <br> It is indeed a surprise to see a "stoves" message from 1998. One first response might be that my e-mail address has changed - and is now rongretlarson@comcast.net - should that have been the intent of Yesipov's message. I would be pleased to answer questions off-list, but would prefer on-list. <br><br>2. A charcoal expert in Russia who might be very helpful is Dr. Yury - whose address is given above. He will know a lot more about the charcoaling industry in Russia that might be helpful. But I hope we can hear more from Yesipov on exactly what he is looking for.<br><br>3. The stoves list still sometimes gives some information on large-scale charcoal making - but Tom Miles has set up a much better list for this sort of inquiry in "biochar-production" (also a Tome Miles lst).. I hope Yesipov and others on "stoves" interested in larger scale char production (such as through the Herreshoff) will join that list.<br><br>4. The quoted 1998 message mentions an "Elsen", who went on to both develop his own clever charcoal-making TLUD stove in Kenya (in about 1998?) - but (as related to this message) independently developed a different char-making approach that we don't hear much about, but I feel should be replicated more. It is (I think is still operating) a BLDD (bottom-lit down draft) - in which a central tall chimney is surrounded by a number (10??) of "pits", connected by tubes to the central chimney. Each "pit" had a grate onto which suitable biomass material (bagasse is a "free" favorite, I think) is piled. Then the system operates in the reverse of TLUDs. Being bottom lit, a small flame at the bottom of the tall central chimney creates an updraft there, which translates to a downdraft at the (ten??) outer-connected grates. As the pyrolysis front travels upward at thesegrates, an attendant who notes the appearance at the top of a "red spot" then loads more fuel (bagasse) at these "red spots". <br> The reversal of the TLUD geometry is beneficial in being able to keep adding fuel - not possible with TLUDs. With a suitable "valve" in the connecting "pipes", any single "grate" can be "turned off" and the resulting char extinguished in some (?) manner.<br><br>5. I have added Kelpie Wilson who asked a question about alternative char-making approaches to which this might be an appropriate answer - in the sense of being able to get more char per person-hour and per equipment dollar. Elsen chose this approach for those reasons.<br><br>6. I have added "biochar-production" as the list most likely to have members having this interest now. (also managed by Tom Miles and his daughter Erin). Maybe someone on that list will have a good response.<br><br>7. The best recent lengthy report I know of on this large scale (non-stove) char production topic is found at: <br> http://www.ecy.wa.gov/pubs/1107017.pdf<br>I have also added the main author, Professor Manuel Garcia-Perez, to acknowledge his good work. He has noted (pp78-81) a commercial group in Australia that is using this approach in a mobile unit - very good news. Others interested in the economics of char-making should also look at his report found at: <br> http://faculty.ses.wsu.edu/WorkingPapers/Yoder/WP2009-25.pdf <br><br>(and there is a separate shorter published peer-reviewed paper)<br><br>8. Please say hello to Dr. Yury for us.<br><br>Ron<br><br><hr id="zwchr"><b>From: </b>"Tom Miles" <tmiles@trmiles.com><br><b>To: </b>"Discussion of biomass cooking stoves" <stoves@lists.bioenergylists.org><br><b>Sent: </b>Thursday, December 22, 2011 10:03:38 AM<br><b>Subject: </b>Re: [Stoves] Herreshof furnace<br><br><style><!--
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</o:shapelayout></xml><![endif]--><div class="WordSection1"><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thank you for your inquiry. </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><br>The message was posted by Ron Larson who moderates discussions on biochar. </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The article on Herreschof furnaces was posted by Auke Koopmans who has lived in Thailand for many years and is now retired from the FAO. </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The FAO article can be found at:</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">http://www.fao.org/docrep/x5555e/x5555e00.htm</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">FAO publication "Industrial charcoal making" FAO Forestry Paper no. 63</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Kind regards,</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><br>Tom Miles</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">T R Miles Technical Consultants, Inc.</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Portland, OR</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">tmiles@trmiles.com</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">www.trmiles.com</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span></p><div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in"><p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> stoves-bounces@lists.bioenergylists.org [mailto:stoves-bounces@lists.bioenergylists.org] <b>On Behalf Of </b>????. ?????? ???? ??????????<br><b>Sent:</b> Wednesday, December 21, 2011 10:59 PM<br><b>To:</b> stoves@lists.bioenergylists.org<br><b>Subject:</b> [Stoves] Herreshof furnace</span></p></div><p class="MsoNormal"> </p><div><p class="MsoNormal">Good day!</p></div><div><p class="MsoNormal">Wanted to know on Your site-forum there is always the author of this article: http://www.repp.org/discussion/stoves/199802/msg00025.html ?</p></div><div><p class="MsoNormal">--</p></div><div><p class="MsoNormal">Yesipov Oleg</p></div><div><p class="MsoNormal">Russia Perm </p></div></div><br>_______________________________________________<br>Stoves mailing list<br><br>to Send a Message to the list, use the email address<br>stoves@lists.bioenergylists.org<br><br>to UNSUBSCRIBE or Change your List Settings use the web page<br>http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org<br><br>for more Biomass Cooking Stoves, News and Information see our web site:<br>http://www.bioenergylists.org/<br><br></div></div></div></body></html>