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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=FR link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Dear Tom,<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'>To reply to your message, I think I would be ready to participate to the making of such a handbook, if there are other people interested as well.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I think the effort would have to be led by an organization rather than an individual: maybe a university or an NGO. I think we should make sure as many people as possible, and from very different organizations, are involved in this handbook.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><br>Best,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><br>Xavier<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'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'>De :</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'> Stoves [mailto:stoves-bounces@lists.bioenergylists.org] <b>De la part de</b> tmiles@trmiles.com<br><b>Envoyé :</b> vendredi 25 août 2017 16:50<br><b>À :</b> 'Discussion of biomass cooking stoves'<br><b>Cc :</b> npenumetcha@cleancookstoves.org; ndesai@alum.mit.edu; rchiang@cleancookstoves.org<br><b>Objet :</b> Re: [Stoves] New Handbook for Biomass Cookstove Research, Design, and Development<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'>There has been a proposal on the list to write an alternative reference to include topics and projects not included in the MIT study, alternative interpretations of methods like WBT, and proposed methods which may be different than those in development by the ISO Committee, etc. Who will lead this effort? Who will outline the “handbook”? Who will write the chapters? Who will edit the handbook and send the chapters out for review by qualified peers? Who will edit the final version? <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'>Distribution and discussion is easy. Writing the content is the challenging part. A place to start is the excellent reply Crispin made to a question I posed some weeks ago. Who is willing to build on this and develop a document that is useful to the target audiences? <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'>Tom<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'>From:</span></b><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'> Stoves [<a href="mailto:stoves-bounces@lists.bioenergylists.org">mailto:stoves-bounces@lists.bioenergylists.org</a>] <b>On Behalf Of </b>Vahid Jahangiri<br><b>Sent:</b> Thursday, August 24, 2017 9:57 AM<br><b>To:</b> Xavier Brandao <<a href="mailto:xav.brandao@gmail.com">xav.brandao@gmail.com</a>>; 'Discussion of biomass cooking stoves' <<a href="mailto:stoves@lists.bioenergylists.org">stoves@lists.bioenergylists.org</a>><br><b>Cc:</b> <a href="mailto:rchiang@cleancookstoves.org">rchiang@cleancookstoves.org</a>; <a href="mailto:npenumetcha@cleancookstoves.org">npenumetcha@cleancookstoves.org</a>; <a href="mailto:ndesai@alum.mit.edu">ndesai@alum.mit.edu</a><br><b>Subject:</b> Re: [Stoves] New Handbook for Biomass Cookstove Research, Design, and Development<o:p></o:p></span></p></div></div><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><div id=divtagdefaultwrapper><p><span style='color:black'>Hi Xavier, <o:p></o:p></span></p><p><span style='color:black'><o:p> </o:p></span></p><p><span style='color:black'>Thank you for your message. <o:p></o:p></span></p><p><span style='color:black'><o:p> </o:p></span></p><p><span style='color:black'>My initial comment surrounds WBT as it can be very misleading for organization who are not stove experts and base their program decisions based on this protocol. WBT is very limited in terms of usability and some of the methodology is not even technically correct especially if it is being conduced at a lab, not at the field. In addition, working with regional testing centers have been extremely frustrating. <o:p></o:p></span></p><p><span style='color:black'><o:p> </o:p></span></p><p><span style='color:black'>I have not had a chance to look at MIT study but it would be great to discuss with various players on how we can collectively work together in preparing the next research studies. <o:p></o:p></span></p><p><span style='color:black'><o:p> </o:p></span></p><p><span style='color:black'>Most important issue is that we have impact for the users and in order to do so, we have to be objective. <o:p></o:p></span></p><p><span style='color:black'><o:p> </o:p></span></p><p><span style='color:black'>I am open to advancing the discussion with everyone. <o:p></o:p></span></p><p><span style='color:black'><o:p> </o:p></span></p><p><span style='color:black'>Thank you,<o:p></o:p></span></p><p><span style='color:black'><o:p> </o:p></span></p><p><span style='color:black'>Vahid <o:p></o:p></span></p><p><span style='color:black'><o:p> </o:p></span></p><p><span style='color:black'><o:p> </o:p></span></p><div id=Signature><div id=divtagdefaultwrapper><p><span style='color:black'>Vahid Jahangiri <o:p></o:p></span></p><p><span style='color:black'>Deputy Director <o:p></o:p></span></p><p><span style='color:black'><a href="http://www.lifelinefund.org">www.lifelinefund.org</a> <o:p></o:p></span></p><p><span style='color:black'>+12029975389 <o:p></o:p></span></p></div></div></div><div class=MsoNormal align=center style='text-align:center'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'><hr size=5 width="98%" align=center></span></div><div id=divRplyFwdMsg><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> Xavier Brandao <<a href="mailto:xav.brandao@gmail.com">xav.brandao@gmail.com</a>><br><b>Sent:</b> Wednesday, August 16, 2017 7:14:04 PM<br><b>To:</b> 'Discussion of biomass cooking stoves'<br><b>Cc:</b> <a href="mailto:psanders@ilstu.edu">psanders@ilstu.edu</a>; <a href="mailto:ndesai@alum.mit.edu">ndesai@alum.mit.edu</a>; <a href="mailto:dsweeney@mit.edu">dsweeney@mit.edu</a>; <a href="mailto:npenumetcha@cleancookstoves.org">npenumetcha@cleancookstoves.org</a>; <a href="mailto:rchiang@cleancookstoves.org">rchiang@cleancookstoves.org</a>; <a href="mailto:lcordes@cleancookstoves.org">lcordes@cleancookstoves.org</a><br><b>Subject:</b> RE: [Stoves] New Handbook for Biomass Cookstove Research, Design, and Development</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'> <o:p></o:p></span></p><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'> <o:p></o:p></span></p></div></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'>Dear all,</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'>I think the initiative and effort to write about the state of stove R&D and research is great. We need to analyse, and provide simple and clear design advices to stove practitioners.</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'>This handbook is supposed to show the current cookstove R&D state-of-the-art. But still, I think this is not the right picture.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'>Or at least it is only a small part of the right picture.</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'>Many important researcher works and names are left out of this paper.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'>I can not imagine a paper claiming to describe recent R&D wook on cookstoves not mentioning Crispin Pemberton-Pigott nor his work even once. Not even one single time. He is simply absent of the document.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'>Dean Still, in the meantime, is mentioned 18 times.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'>No one on this list will deny what Crispin did and is doing for stove research, he has to be somewhere in the document.<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'>I cannot understand that in August 2017 the MIT and GACC still publish, again, a document that, again, vouches for the WBT. p 7 in the « 1.3 PERFORMANCE TESTING » chapter, only the WBT is mentioned! How is that possible? What message are we conveying to new designers? What about the past conversations about the WBT since the beginning of the year? What about Ranyee admitting (like other</span>s<span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'> do) that we have « moved beyond » the WBT?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'>How can people not think again that the GACC has actively worked to publicize and promote the WBT, at the detriment of all the other protocols?<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'>As Samer mentioned in his message to Neeraja Penumetcha, this paper mentions almost uniquely U.S. stove researchers (p 4-5 of the document), at the detriment of all the other researchers. How can it remain silent about the astounding work from for example Europe, Central Asia, China, Indonesia? How can it not even mention the state-of-the-art topics that were discussed at length on this List?</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'>Looking at the « TABLE 3: RECENT BIOMASS COOKSTOVE R&D PROJECTS THAT WERE SURVEYED FOR THIS REPORT » one can only note that all the organizations are from U.S.A. All of them. How can that not be considered like ethnocentricity?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'>Is the state-of-the-art in the cookstove sector the recycling of old and largely criticized work of the Aprovecho dating from 2007-2009?<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'>ARC new products are mentioned many times (p 13, 18, 40, 41, 42). <o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'>Other stove models, technologies, projects, research could, should have been mentioned, at least once, for example:<o:p></o:p></span></p><ul style='margin-top:0cm' type=disc><li class=MsoNormal style='color:windowtext;line-height:115%;mso-list:l0 level1 lfo1'><span style='font-size:11.0pt;line-height:115%;font-family:"Calibri","sans-serif"'>Servals TLUDs - <b>India<o:p></o:p></b></span></li><li class=MsoNormal style='color:windowtext;line-height:115%;mso-list:l0 level1 lfo1'><span style='font-size:11.0pt;line-height:115%;font-family:"Calibri","sans-serif"'>Paul Olivier stoves - <b>Vietnam</b><o:p></o:p></span></li><li class=MsoNormal style='color:windowtext;line-height:115%;mso-list:l0 level1 lfo1'><span style='font-size:11.0pt;line-height:115%;font-family:"Calibri","sans-serif"'>China-made improved cookstoves - <b>China</b><o:p></o:p></span></li><li class=MsoNormal style='color:windowtext;line-height:115%;mso-list:l0 level1 lfo1'><span style='font-size:11.0pt;line-height:115%;font-family:"Calibri","sans-serif"'>Vesto and other New Dawn Engineering stoves - <b>Swaziland</b><o:p></o:p></span></li><li class=MsoNormal style='color:windowtext;line-height:115%;mso-list:l0 level1 lfo1'><span style='font-size:11.0pt;line-height:115%;font-family:"Calibri","sans-serif"'>Rocket Works stoves, Adrian Padt - <b>South</b> <b>Africa</b><o:p></o:p></span></li><li class=MsoNormal style='color:windowtext;line-height:115%;mso-list:l0 level1 lfo1'><span style='font-size:11.0pt;line-height:115%;font-family:"Calibri","sans-serif"'>Silverfire new line of stoves - <b>U.S., China</b><o:p></o:p></span></li><li class=MsoNormal style='color:windowtext;line-height:115%;mso-list:l0 level1 lfo1'><span style='font-size:11.0pt;line-height:115%;font-family:"Calibri","sans-serif"'>Rebecca Vermeer, Eco-Kalan stoves - <b>Philippines</b><o:p></o:p></span></li><li class=MsoNormal style='color:windowtext;line-height:115%;mso-list:l0 level1 lfo1'><span style='font-size:11.0pt;line-height:115%;font-family:"Calibri","sans-serif"'>Roger Samson, Mayon Turbo stove - <b>South</b> <b>Africa</b><o:p></o:p></span></li><li class=MsoNormal style='color:windowtext;line-height:115%;mso-list:l0 level1 lfo1'><span style='font-size:11.0pt;line-height:115%;font-family:"Calibri","sans-serif"'>Practical Action, CHF stoves - <b>Sudan</b><o:p></o:p></span></li><li class=MsoNormal style='color:windowtext;line-height:115%;mso-list:l0 level1 lfo1'><span style='font-size:11.0pt;line-height:115%;font-family:"Calibri","sans-serif"'>CSI Indonesia Pilot stoves - <b>Indonesia</b><o:p></o:p></span></li><li class=MsoNormal style='color:windowtext;line-height:115%;mso-list:l0 level1 lfo1'><span style='font-size:11.0pt;line-height:115%;font-family:"Calibri","sans-serif"'>Prime and Dr Nurhuda stoves - <b>Indonesia</b><o:p></o:p></span></li><li class=MsoNormal style='color:windowtext;line-height:115%;mso-list:l0 level1 lfo1'><span style='font-size:11.0pt;line-height:115%;font-family:"Calibri","sans-serif"'>Ecochina Stove - <b>El Salvador<o:p></o:p></b></span></li><li class=MsoNormal style='color:windowtext;line-height:115%;mso-list:l0 level1 lfo1'><span style='font-size:11.0pt;line-height:115%;font-family:"Calibri","sans-serif"'>Anglo Supra Nova stove - <b>Indonesia</b><o:p></o:p></span></li><li class=MsoNormal style='color:windowtext;line-height:115%;mso-list:l0 level1 lfo1'><span style='font-size:11.0pt;line-height:115%;font-family:"Calibri","sans-serif"'>University of Adelaïde papers - <b>Australia</b><o:p></o:p></span></li><li class=MsoNormal style='color:windowtext;line-height:115%;mso-list:l0 level1 lfo1'><span style='font-size:11.0pt;line-height:115%;font-family:"Calibri","sans-serif"'>CSI project papers - <b>Indonesia</b><o:p></o:p></span></li><li class=MsoNormal style='color:windowtext;line-height:115%;mso-list:l0 level1 lfo1'><span style='font-size:11.0pt;line-height:115%;font-family:"Calibri","sans-serif"'>DUE conference papers - <b>South</b> <b>Africa</b><o:p></o:p></span></li><li class=MsoNormal style='color:windowtext;line-height:115%;mso-list:l0 level1 lfo1'><span style='font-size:11.0pt;line-height:115%;font-family:"Calibri","sans-serif"'>GERES project papers - <b>South-East Asia<o:p></o:p></b></span></li></ul><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'>This list is not exhaustive.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'>Crispin says that his Vesto and Roger Samson’s stove both out-perform a Rocket stove quite handily, with the simmering ‘efficiency’ of a Vesto being above 65%.</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'>I think unfortunately, this D-Lab handbook is misrepresenting to outsiders the actual current state of cookstove research.</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'><o:p> </o:p></span></p><p class=MsoNormal style='margin-bottom:10.0pt'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>I put Dan Sweeney in copy of this message. Dan, since you are a member of the Stove List as well, I put you in copy: your contributions would be most welcome.</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'>Others on the list, your opinions would also help in this discussion.</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'>Best</span> regards<span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'>,</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'>Xavier<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'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'>De :</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'> Stoves [<a href="mailto:stoves-bounces@lists.bioenergylists.org">mailto:stoves-bounces@lists.bioenergylists.org</a>] <b>De la part de</b> Paul Anderson<br><b>Envoyé :</b> mardi 1 août 2017 16:19<br><b>À :</b> Discussion of biomass cooking stoves; Doc Anderson<br><b>Objet :</b> Re: [Stoves] New Handbook for Biomass Cookstove Research, Design, and Development<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'>Stovers, (and placed on the ePosts at the <a href="http://www.drtlud.com">www.drtlud.com</a> website for easy access and wider audiences)<br><br>This new publication is definitely worth some of your time to download (free), save, and look at (at least scroll through and "read at your degree of interest"). Good diagrams, and very nice summaries of the issues of stove R&D and design. <br><br>Download the full handbook here: <a href="http://cleancookstoves.org/resources/517.html">http://cleancookstoves.org/resources/517.html</a> <br><br>Of course I focused on the TLUD issues. <br>1. No glaring errors were noted. (Opps, one is noted when I wrote the content below). <br><br>2. There were some understatements that have background stories that would be too detailed for this publication.<br>Example is on Page# 22 (22 of 36 digital sheets).<o:p></o:p></p><p class=MsoNormal>FUEL BATCH SIZE AND RELOADING IN GASIFIER STOVES<br>Users of batch-fueled cookstoves like TLUDs often wish to continue cooking after the initial fuel <br>batch has burned out. Adding new fuel to the stove causes it to switch from operating in a TLUD <br>mode to a conventional updraft gasifier mode (Figure 15).<o:p></o:p></p><p class=MsoNormal>That part is true. But then it goes on about Tryner's work at CSU with observed difficulties (correct) but does not say that that research put in a substantial amount of new fuel all at one time (a major cause of the difficulties). <br><br>The continuing paragraph refers to Aprovecho results with a TLUD-FA stove (incorrectly reference to the Reed-Larson 1996 article about TLUD-ND stoves) and states that performace is not compromised when: <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto'><span style='font-size:10.5pt'>the user can meter in additional fuel through the door in a low-power operating mode. </span><o:p></o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'>Sorry, but in my opinion, there are serious compromises (some increase in emissions including when each new amount of fuel hits the top of the charcoal bed and shortening the stove life because of high temperatures from air directly blowing on hot charcoal in the bottom). Therefore, this refueling is NOT good advice. So, I would say that this is a glaring error that unfortunately will be repeated over and over, with citation to this publication. But that is only my opinion.<br><br>3. A few missed opportunities to make more complete statements:<br> Example: Page # 32 (34 of 36 digital sheets):<o:p></o:p></p><p class=MsoNormal>To achieve more turbulent flow without a fan, natural-draft cookstove designers have added features <br>to the interior geometry that suddenly change the flow path and create turbulence in local <br>mixing zones. <o:p></o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'>Very true. Then comes the example with a side-feed stick-burner stove (rocket type, but not showing the rocket fuel shelf; in fact, I do not recall seeing a full discussion of the true Rocket innovation by Winearski to have the air entering under the burning tips of the sticks).<o:p></o:p></p><p class=MsoNormal>For example, the Envirofit G-3300 has a choke ring, like a large metal washer, in the riser. The <br>choke ring disturbs the flow of air and combustion gases and generates a local mixing zone <br>(Figure 20) (DeFoort et al., 2010.<o:p></o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'>Then there is reference to Natural Draft TLUDs, but only the stationary vane that were pioneered by Kirk Harris (not mentioned) and attributed to Aprovecho.<br><br>What was not mentioned is the "concentrator" (disk or plate) that does precisely the same thing as does a "choke ring"and it is the <br>fundamental innovation of Wendelbo's Peko Pe TLUD (1990s) and Anderson's Champion TLUD (2005). <br> <br>I hope that others will send comments about this publication that is worthy of wide consideration by all "Stovers".<br><br>Paul<o:p></o:p></p><pre><span style='font-size:10.0pt;font-family:"Courier New"'>Doc / Dr TLUD / Prof. Paul S. Anderson, PhD<o:p></o:p></span></pre><pre><span style='font-size:10.0pt;font-family:"Courier New"'>Email: <a href="mailto:psanders@ilstu.edu">psanders@ilstu.edu</a><o:p></o:p></span></pre><pre><span style='font-size:10.0pt;font-family:"Courier New"'>Skype: paultlud Phone: +1-309-452-7072<o:p></o:p></span></pre><pre><span style='font-size:10.0pt;font-family:"Courier New"'>Website: <a href="http://www.drtlud.com">www.drtlud.com</a><o:p></o:p></span></pre><div><p class=MsoNormal>On 8/1/2017 6:36 AM, Neeraja Penumetcha wrote:<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><pre><span style='font-size:10.0pt;font-family:"Courier New"'>Biomass cookstove technology and performance have significantly improved over the last decade. Yet entrepreneurs and designers trying to build a better stove can still face a wide range of challenges. Design features that improve performance can come with higher production costs or usability challenges, for example. Enterprises often have limited resources for research and development, but must produce higher performing, usable, affordable technologies to stay competitive. R&D advancements that help balance these requirements are often not translated into practical guidance that is accessible to stove designers.<o:p></o:p></span></pre><pre><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></pre><pre><span style='font-size:10.0pt;font-family:"Courier New"'>A new handbook aims to help designers and entrepreneurs by translating recent R&D advances into practical approaches for improving biomass cookstove performance, usability, and affordability. The Handbook for Biomass Cookstove Research, Design, and Development, was developed in partnership with MIT's D-Lab and the Global Alliance for Clean Cookstoves, with funding by UK aid from the UK government. Topics including ignition, air, fuel, mixing, and materials are covered through a synthesis of research findings and innovations from several different organizations. These components of the cooking process are all highly interrelated, so the handbook encourages consideration of these components together.<o:p></o:p></span></pre><pre><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></pre><pre><span style='font-size:10.0pt;font-family:"Courier New"'>Download the full handbook here: <a href="http://cleancookstoves.org/resources/517.html">http://cleancookstoves.org/resources/517.html</a><o:p></o:p></span></pre><pre><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></pre><pre><span style='font-size:10.0pt;font-family:"Courier New"'>_______________________________________________<o:p></o:p></span></pre><pre><span style='font-size:10.0pt;font-family:"Courier New"'>Stoves mailing list<o:p></o:p></span></pre><pre><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></pre><pre><span style='font-size:10.0pt;font-family:"Courier New"'>to Send a Message to the list, use the email address<o:p></o:p></span></pre><pre><span style='font-size:10.0pt;font-family:"Courier New"'><a href="mailto:stoves@lists.bioenergylists.org">stoves@lists.bioenergylists.org</a><o:p></o:p></span></pre><pre><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></pre><pre><span style='font-size:10.0pt;font-family:"Courier New"'>to UNSUBSCRIBE or Change your List Settings use the web page<o:p></o:p></span></pre><pre><span style='font-size:10.0pt;font-family:"Courier New"'><a href="http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org">http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org</a><o:p></o:p></span></pre><pre><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></pre><pre><span style='font-size:10.0pt;font-family:"Courier New"'>for more Biomass Cooking Stoves, News and Information see our web site:<o:p></o:p></span></pre><pre><span style='font-size:10.0pt;font-family:"Courier New"'><a href="http://stoves.bioenergylists.org/">http://stoves.bioenergylists.org/</a><o:p></o:p></span></pre><pre><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></pre></blockquote><p class=MsoNormal><o:p> </o:p></p></div></div></body></html>