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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>Crispin,<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>These stoves you mention sound great. (I have been very interested in using chimneys to get some of the benefits of fan assisted stoves.)<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Where can I see one, or plans for one? Any other practical details?<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Huck<o:p></o:p></span></p><p class=MsoNormal><a name="_MailEndCompose"><span style='color:#1F497D'><o:p> </o:p></span></a></p><div><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";color:windowtext'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'> Crispin Pemberton-Pigott [mailto:crispinpigott@outlook.com] <br><b>Sent:</b> Thursday, October 9, 2014 9:09 AM<br><b>To:</b> 'Discussion of biomass cooking stoves'<br><b>Subject:</b> Re: [Stoves] modification to Champion TLUD<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'>Paul, I forgot to point out that none of the TLUD’s approved for subsidy in Mongolia this year have fans. They all have a chimney between 90 and 127 mm in diameter. I think it is important to emphasize this point is people are still wandering around saying only fan stoves can be really clean which is simply not true.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'>A few of the stoves submitted to the CSI-Indonesia are natural draft stoves, not all TLUD’s and are as clean as a Philips fan stove (I mention that because it has been held up, multiple times, as the limit of ‘current’ combustion technology). One stove does not require chopping the fuel into small pieces, can be continuously fed, does not have a fan and is fully controllable. It also meets the cooking power requirements of the community where it will be sold.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'>Regards</span><span lang=EN-CA><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'>Crispin<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'>Dear Paul and All<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'><o:p> </o:p></span></p><div><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'>I am seconding the comments:<o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:12.0pt'><span lang=EN-CA style='color:#1F497D'>></span><span lang=EN-CA>For this topic, I hope that the work of Kirk Harris and Jock Jill and Julian Winter and others will be considered for incorporation into you designs.</span><span lang=EN-CA style='color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'>and<o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:12.0pt'><span lang=EN-CA><br></span><span lang=EN-CA style='color:#1F497D'>></span><span lang=EN-CA>4. Of course, so many things change when even a little forced air (FA) is applied. And that is why I have favored SINGLE entry points for the primary air and the secondary air. Force air will be increasingly more available, and its impacts are highly advantageous in TLUD stoves.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'>There is still much to know about how these stoves can be optimised first for combustion, then heat transfer, then controllability.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'>I can happily report that stoves which are TLULD’s have been submitted to the CSI-Indonesia stove pilot that are able to be controlled without a fan, across the range of power needed by the users in Central Java. That has been shown with the CSI-WHT which is a test method that replicates average user behaviour. That means we have already commercially available TLUD’s which have sufficient cooking power, sufficient power control and low enough emissions to meet user and programme needs. This is no small achievement.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'>I caution the tinkering community which has brought us to this stage, directly or indirectly, not to assume that anything new to you is new to everyone. That is not a criticism. That is a caution to be a bit circumspect about claims to novelty. There are companies working on these problems and they are not sharing much. Paul points out that some have received grants to work on this. That doesn’t mean the results are public or even published.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'>Remember that 3 years ago I reported there were TLUD stoves in Mongolia burning cleaner than the ambient air in terms of PM2.5. This is no small feat. I share what I can but I can’t cover everything that is going on. There are 6 qualifying stove this year in Ulaanbaatar. They are all <i>much</i> clean than a Philips fan stove, and that is the minimum to get into the programme – about a 95% reduction against the baseline stove burning the mandatory test fuel. All this is taking place without reference to the informal sector stove community (us, for the most part). There is a lot going on. The producers are all in Turkey, China and Mongolia.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'>So going forward, if you want to build controllable and clean burning stoves, please check what is already being made available and try to extend or replicate those achievements. It is not necessary to have a fan to reduce emissions by 90 or 95%. It is necessary to understand well how things can burn and how to make fuels burn that well.<o:p></o:p></span></p></div><p class=MsoNormal><span lang=EN-CA style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'>Regards<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'>Crispin<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'><o:p> </o:p></span></p></div></body></html>