<div dir="ltr"><div class="gmail_default" style="font-size:small">Here is a <a href="https://docs.google.com/document/d/167i50oweyfe23bRMnDSeJwlu0eM4IgTek6IO2C6JPes/edit?usp=sharing">report from Zambia</a> indicating that the rock bed and second metal grate improve the efficiency of the Zambian mbaula (all-metal) charcoal jiko by 41%. Cooking time is also greatly reduced. While these testers have no training, their results are consistent.</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">This is such a simple modification that dissemination could be very rapid. I hope some of you can try this. </div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Oct 10, 2019 at 1:37 PM K McLean <info@sun24.solar> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_default" style="font-size:small"><div dir="ltr"><div class="gmail_default">Listmates,</div><div class="gmail_default"><br></div><div class="gmail_default">Has anyone tried this?</div><div class="gmail_default"><br></div><div class="gmail_default"><div class="gmail_default">We seem to have significantly increased the efficiency of charcoal jikos by putting a bed of rocks on the jiko's grate and putting second metal grate on the rock bed. The charcoal goes on the second metal grate. 2-3 cm rocks work. It works in all metal jikos and clay jikos that we've tested. </div><div class="gmail_default"><br></div><div class="gmail_default">Our testing is early and unscientific, but consistent. 25-50% less fuel used. Here are three reports. The Sierra Leone report has good photos at the bottom.</div><div class="gmail_default"><span id="gmail-m_7143231675533950200m_4206997578200011798gmail-m_-5379600863218226737gmail-m_-1297279476715938052gmail-m_1825955397064429865gmail-docs-internal-guid-10e1cdb9-7fff-27f8-efcc-c921a0e5cc06"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><a href="https://drive.google.com/file/d/12MvBKjxq6PCGCcCHAjSYSeVXXvl7jWjD/view?usp=sharing" style="text-decoration-line:none" target="_blank"><span style="font-size:10pt;font-family:Arial;background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;text-decoration-line:underline;vertical-align:baseline;white-space:pre-wrap">Sierra Leone</span></a></p><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><a href="https://drive.google.com/open?id=1zQIY49E1vrfjYl7t5V_shvw70d67QirGWUrbW51tDxo" style="text-decoration-line:none" target="_blank"><span style="font-size:10pt;font-family:Arial;background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;text-decoration-line:underline;vertical-align:baseline;white-space:pre-wrap">Uganda</span></a></p><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="text-decoration-line:underline;font-size:10pt;font-family:Arial;background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"><a href="https://drive.google.com/open?id=1MPwHCwKEVqJvuybKB5Yj39nr8fbcopBP" style="text-decoration-line:none" target="_blank">Kenya (very few rocks)</a></span></p><p style="line-height:1.38;margin-top:0pt;margin-bottom:0pt">(The report authors are untrained and not native English speakers. Especially the Kenya report contains many errors. Please focus on the consistent final conclusion that a rock bed and second metal grate significantly reduce firewood usage.)</p></span><br></div><div class="gmail_default">This may be a very low cost, very easy way to greatly improved the efficiency of charcoal jikos. I'd like to hear if there is already a body of work on this. Here is my rough drawing:</div><div class="gmail_default"><br></div><div class="gmail_default"><div><div><img src="cid:ii_k1kzflrt1" alt="20191010_133359.jpg" width="397" height="529"><br></div></div></div></div></div></div><div><div dir="ltr"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div><br></div><div>Thank you,<br></div><div>Kevin</div><div dir="ltr"><i><br></i></div><div dir="ltr"><i>Kevin McLean, President</i></div><div dir="ltr"><div><i>Sun24</i></div><div><i><a href="https://sun24.solar" target="_blank">https://sun24.solar</a> <a href="https://docs.google.com/document/d/1ZryS7gQ1q3zKLZPM2KcXdtIHbOYQp4PbloPqMvrlZ5Y/edit?usp=sharing" target="_blank">Sun24 Cookstoves Overview</a><br></i></div><div><i>Tampa, Florida, USA</i></div><div><i><span title="Call with Google Voice"><span title="Call with Google Voice"><span title="Call with Google Voice">+1 (813) 505-3340</span></span></span></i></div><div><br></div><div> <img src="https://docs.google.com/uc?export=download&id=13teZQbnv_6ek6JkEy-4n0yyUVTrl3M2W&revid=0B8zNcWsuiuj3N2RuVFFYL3EvdElxR1lDcm9QQVlaL0F4VnVFPQ" width="200" height="200"> <img src="https://docs.google.com/uc?export=download&id=11k6wcaMcCbykOoLu-Qo4n6Kbdhplk_er&revid=0B8zNcWsuiuj3ejdsRjRXQWU2OW4rVUpwMUx0Q0U0eXgxcStBPQ" width="200" height="200"></div><div><br><i><span title="Call with Google Voice"><span title="Call with Google Voice"><span title="Call with Google Voice"><br><br></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></div></div></div></div>
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