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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-CA link=blue vlink=blue><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Dear Lloyd<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>That is great news. If you are passing through Waterloo please stop in so we can do a couple of emission tests.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I was working on the weekend to burn one of the worst fuels I have seen so far – a 100mm diameter high density sawdust log with no hole in the centre. Eventually I got it working well and boiled 5.2 litres in 16 minutes. I used a 130mm long piece standing up on end in a Vesto. I also tried drilling a 1 inch hole through the centre but to burn that it needs to be in ‘gasifier mode’. That means starting with a higher primary air flow then closing it. Not as convenient but possible.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Regards<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Crispin<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0mm 0mm 0mm'><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'> stoves-bounces@lists.bioenergylists.org [mailto:stoves-bounces@lists.bioenergylists.org] <b>On Behalf Of </b>Lloyd Helferty<br><b>Sent:</b> 16 August 2011 14:31<br><b>To:</b> Discussion of biomass cooking stoves<br><b>Subject:</b> Re: [Stoves] Jatropha and its future<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Christina (And Jan),<br><br> Just to let you (and everyone) know, I was able to successfully use/burn whole Jatropha nuts in a natural draft Top-Lit- UpDraft (TLUD) stove (made out of tin cans) at the recent CHAB Camp hosted by the Biomass Energy Foundation in Belchertown, MA. I did it outdoors on a windy day.<br> While I did not intentionally inhale the smoke, I do not believe that the smoke of the J-nuts was any more toxic than other types of smoke. Hugh McLaughlin actually explained that the smoke from a Jatropha fire was likely just as toxic as from any other fire -- smoke of any kind tends to be something one should not breathe [hence the warning on cigarette boxes].<br> My little natural draft TLUD produced very little smoke once the secondary airflow was adjusted properly and pyrolyzing the Jatropha nuts, although when it was left unattended it did start smoking a little bit at the end of the burn as the stove attempted to burn through the resulting biochar. (Although if this were running indoors, I would probably be more worried about the CO being produced than any toxicity that might arise from the J-nuts.)<br><br><o:p></o:p></p><pre> Lloyd Helferty, Engineering Technologist<o:p></o:p></pre></div></body></html>