<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">List, cc Kevin</div><div dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><br class=""></div><div dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><span class="Apple-tab-span" style="white-space:pre"> </span>This is to encourage this list to view the two “Sun24” links given below. Because I was so impressed when I viewed those, I had a nice phone conversation with Kevin yesterday. A few things I learned:</div><div dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><span class="Apple-tab-span" style="white-space:pre"> </span> Kevin is a retired lawyer. Retired for only a year, but already in contact with stove-knowledgeable NGOs in many countries. Through them, he is offering - for free - improvements in 3-stone use of doubled efficiency, and improved emssions. Working also with some low-cost rocket designs. Not yet working on TLUDs - but knowledgeable about them, and supportive at the right price. Has stove modifications measured in multiples of 10k, I think (in only a few past months).</div><div dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><br class=""></div><div dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><span class="Apple-tab-span" style="white-space:pre"> </span>His emphasis on major stove improvements at zero cost (better air delivery), with local NGO support, is something we have been mostly missing in our stove development efforts. Emphasis zero cost - described at these two sites given below.</div><div dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><br class=""></div><div dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Ron</div><div dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Mar 28, 2019, at 9:24 AM, K McLean <<a href="mailto:info@sun24.solar" class="">info@sun24.solar</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class=""><div class="gmail_default" style="font-size:small">Sun24 and its partners operate at the primitive end of the cookstove spectrum.</div><div class="gmail_default" style="font-size:small"><br class=""></div><div class="gmail_default" style="font-size:small">We have found that both rocks (or broken clay bricks) and a clay grate improve open-fire wood cookstoves' efficiency. Here are examples of rocks and a clay grate in a three-stone cookstoves:</div><div class="gmail_default" style="font-size:small"><div class=""><span id="cid:ii_jtsqp0pr0"><Rocks in 3-stone.jpg></span><div class=""><span id="cid:ii_jtsqp0r91"><Clay disc grate in 3-stone stove.jpg></span><br class=""></div></div></div><div class="gmail_default" style="font-size:small"></div><div class="gmail_default" style="font-size:small"><a href="https://drive.google.com/file/d/183kPF5DrwIR5mdDhE7xC9AaNJLaorGZt/view?usp=sharing" class="">SNV tested</a> the rocks and clay grate in its open-fire stove. Here are SNV's results:</div><blockquote style="margin:0 0 0 40px;border:none;padding:0px" class=""><div class="gmail_default" style="font-size:small"><div class="gmail_default"><span class="gmail-il">Rocks</span> vs unmodified open fire</div></div><blockquote style="margin:0 0 0 40px;border:none;padding:0px" class=""><div class="gmail_default" style="font-size:small"><div class="gmail_default">+30% Thermal efficiency</div></div></blockquote><blockquote style="margin:0 0 0 40px;border:none;padding:0px" class=""><div class="gmail_default" style="font-size:small"><div class="gmail_default">-27% Wood fuel used</div></div></blockquote><blockquote style="margin:0 0 0 40px;border:none;padding:0px" class=""><div class="gmail_default" style="font-size:small"><div class="gmail_default">-53% CO </div></div></blockquote><blockquote style="margin:0 0 0 40px;border:none;padding:0px" class=""><div class="gmail_default" style="font-size:small"><div class="gmail_default">-57% PM </div></div></blockquote><div class="gmail_default" style="font-size:small"><div class="gmail_default"><span class="gmail-il">Clay</span> <span class="gmail-il">grate</span> vs unmodified open fire</div></div><blockquote style="margin:0 0 0 40px;border:none;padding:0px" class=""><div class="gmail_default" style="font-size:small"><div class="gmail_default"><div class="gmail_default">+52% Thermal efficiency</div></div></div></blockquote><blockquote style="margin:0 0 0 40px;border:none;padding:0px" class=""><div class="gmail_default" style="font-size:small"><div class="gmail_default"><div class="gmail_default">-47% Wood fuel used </div></div></div></blockquote><blockquote style="margin:0 0 0 40px;border:none;padding:0px" class=""><div class="gmail_default" style="font-size:small"><div class="gmail_default"><div class="gmail_default">-57% CO </div></div></div></blockquote><blockquote style="margin:0 0 0 40px;border:none;padding:0px" class=""><div class="gmail_default" style="font-size:small"><div class="gmail_default"><div class="gmail_default">-58% PM </div><div class="gmail_default"><br class=""></div></div></div></blockquote></blockquote><div class="gmail_default" style="font-size:small">Early user feedback suggests that rocks in traditional charcoal cookstoves also improve efficiency. We are expanding our informal field testing and hope to test in the lab soon.</div><div class="gmail_default" style="font-size:small"><br class=""></div><div class="gmail_default" style="font-size:small">Since rocks and broken clay bricks are free and ubiquitous, we only need to disseminate the idea, not a product. We are rapidly disseminating the idea with success in Kenya, Uganda and India by training women group association leaders to train others who then train at the local level. In Kenya and Uganda we are working with the Catholic and Anglican Churches. In just a couple months and at low cost, we have trained tens of thousands of women to use this simple modification. The trainers' feedback is that the users love it.</div><div class="gmail_default" style="font-size:small"><br class=""></div><div class="gmail_default" style="font-size:small">Here is our occasionally-but-not-frequently-enough updated <a href="https://docs.google.com/document/d/1ZryS7gQ1q3zKLZPM2KcXdtIHbOYQp4PbloPqMvrlZ5Y/edit?usp=sharing" class="">Cookstoves Overview</a>.</div><div class="gmail_default" style="font-size:small"><br class=""></div><div class="gmail_default" style="font-size:small">These cookstove modifications are a transitional first step but they are important.</div><div class="gmail_default" style="font-size:small"><br class=""></div><div class="gmail_default" style="font-size:small">All suggestions are welcome and appreciated.</div><div class=""><br class=""></div><div class=""><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr" class=""><div class=""><div dir="ltr" class=""><div class=""><div dir="ltr" class=""><div class=""><div dir="ltr" class=""><div class=""><div dir="ltr" class=""><div dir="ltr" class=""><div dir="ltr" class=""><div dir="ltr" class=""><div dir="ltr" class=""><div dir="ltr" class=""><div dir="ltr" class=""><div dir="ltr" class=""><div dir="ltr" class=""><div dir="ltr" class=""><div dir="ltr" class=""><div dir="ltr" class=""><div dir="ltr" class=""><div class="">Kevin</div><div dir="ltr" class=""><i class=""><br class=""></i></div><div dir="ltr" class=""><i class="">Kevin McLean, President</i></div><div dir="ltr" class=""><div class=""><i class="">Sun24</i></div><div class=""><i class=""><a href="https://sun24.solar/" target="_blank" class="">https://sun24.solar</a> <a href="https://docs.google.com/document/d/1ZryS7gQ1q3zKLZPM2KcXdtIHbOYQp4PbloPqMvrlZ5Y/edit?usp=sharing" target="_blank" class="">Sun24 Cookstoves Overview</a><br class=""></i></div><div class=""><i class="">Tampa, Florida, USA</i></div><div class=""><i class=""><span title="Call with Google Voice" class=""><span title="Call with Google Voice" class=""><span title="Call with Google Voice" class="">+1 (813) 505-3340</span></span></span></i></div><div class=""><br class=""></div><div class=""> <img src="https://docs.google.com/uc?export=download&id=13teZQbnv_6ek6JkEy-4n0yyUVTrl3M2W&revid=0B8zNcWsuiuj3N2RuVFFYL3EvdElxR1lDcm9QQVlaL0F4VnVFPQ" width="200" height="200" class=""> </div><div class=""><br class=""><i class=""><span title="Call with Google Voice" class=""><span title="Call with Google Voice" class=""><span title="Call with Google Voice" class=""><br class=""><br class=""></span></span></span></i></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div>
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