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<div name="BB10" id="BB10_response_div_BBPPID" dir="auto" style="width:100%">Dear Nikhil </div>
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<div name="BB10" id="BB10_response_div_BBPPID" dir="auto" style="width:100%">You ask good questions. </div>
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<div name="BB10" id="response_div_spacer_BBPPID" dir="auto" style="width:100%">Africa is the place but not exclusively. I have a document showing the sums. </div>
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<div name="BB10" id="response_div_spacer_BBPPID" dir="auto" style="width:100%">It has been certified by the SNV lab in Cambodia using their modified water boiling test which was developed by GERES to try to correct some problems in the WBT4. </div>
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<div name="BB10" id="response_div_spacer_BBPPID" dir="auto" style="width:100%">The comparison is made with the performance of a three stone fire. The TSF is still very popular. </div>
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<div name="BB10" id="response_div_spacer_BBPPID" dir="auto" style="width:100%">The technology is not limited to three stones. They are experimenting with adding rocks (which increases breathing through the coals on the bottom) is all manner of stoves. </div>
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<div name="BB10" id="response_div_spacer_BBPPID" dir="auto" style="width:100%">Consider the rocket stove. It suffers from a high char production rate (as a fraction of fuel fed) and the change really improves performance in terms of high power, lower fuel needed
and lowered emissions. </div>
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<div name="BB10" id="response_div_spacer_BBPPID" dir="auto" style="width:100%">Charcoal stoves seem to be improved if they are not the latest designs. At present we don't have to know why the rocks work, it is enough that they do. </div>
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<div name="BB10" id="response_div_spacer_BBPPID" dir="auto" style="width:100%">There is a very high retention rate. That alone indicates that it makes a perceptible difference and that it is beneficial. </div>
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<div name="BB10" id="response_div_spacer_BBPPID" dir="auto" style="width:100%">I talked to two users and they agreed it saves a lot of fuel. About half, she said. </div>
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<div name="BB10" id="response_div_spacer_BBPPID" dir="auto" style="width:100%">Until future notice, all stoves should be tested with stones added under the fuel. See what happens. Maybe it's good. Maybe it's always good. </div>
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<div name="BB10" id="response_div_spacer_BBPPID" dir="auto" style="width:100%">Let's see. Nothing could be cheaper. </div>
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<div name="BB10" id="response_div_spacer_BBPPID" dir="auto" style="width:100%">As to what would Berkeley do, they will sell stove use monitors. </div>
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<div name="BB10" id="response_div_spacer_BBPPID" dir="auto" style="width:100%">Regards </div>
<div name="BB10" id="response_div_spacer_BBPPID" dir="auto" style="width:100%">Crispin </div>
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<div id="from"><b>From:</b> pienergy2008@gmail.com</div>
<div id="sent"><b>Sent:</b> November 8, 2019 2:33 PM</div>
<div id="to"><b>To:</b> crispinpigott@outlook.com</div>
<div id="reply_to"><b>Reply to:</b> ndesai@alum.mit.edu</div>
<div id="cc"><b>Cc:</b> cec1863@gmail.com; stoves@lists.bioenergylists.org</div>
<div id="subject"><b>Subject:</b> Re: [Stoves] Pebble bed three stone fire</div>
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<div dir="ltr">Crispin:</div>
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<div dir="ltr">Cute. Glad. Please give some context when possible: <br>
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1. Where? <br>
2. Is this measured and certified under ISO protocols using WBT? If so, it can be compared with the tens of other products. <br>
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Taking your "3 million" at face value, SNV success is to be celebrated. I don't really know how many of the "3 billion" people do all their cooking and water heating with literally "three stones" - nobody knows, pretense notwithstanding - but it is always good
to find such examples of innovation. Unfortunately, I have had no first hand experience of cooking with wood on three stones. <br>
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Just think - if rocks can reduce emissions, the price of aDALY could be driven down to $0.05 per capita per year! What would Berkeley do? <br>
<br>
N</div>
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<div><font face="georgia, serif">------------------------------------------------------------------------<br>
Nikhil Desai</font></div>
<div><span style="font-family:georgia,serif; font-size:small">(US +1) 202 568 5831</span><font face="georgia, serif"><br>
<i>Skype: nikhildesai888</i><br>
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<div dir="ltr" class="gmail_attr">On Thu, Nov 7, 2019 at 9:38 AM Crispin Pemberton-Pigott <<a href="mailto:crispinpigott@outlook.com">crispinpigott@outlook.com</a>> wrote:<br>
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Dear Friends </div>
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This is a photo of the three stone fire with a set of stones in it, and a clay grate as an aeration device. </div>
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In the past 8 months about 3 million people have adopted this as a fuel saving and emissions reduction "device". </div>
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The retention rate (continued use) is in the high 90's % range. It's effect is obvious and basically free. </div>
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This is a demo presented by SNV after the ISO meeting. </div>
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Regards </div>
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Crispin </div>
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