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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">Dear Ron<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">Acceptable results from a stove test, relating to char are:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<ol style="margin-top:0cm" start="1" type="1">
<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">Mass of char produced divided by the mass of fuel fed into the stove.<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">The energy in the char produced divided by the energy in the fuel fed into the stove.<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">The mass of recoverable portion of the char divided by the total mass of char produced.<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">The energy in recoverable char divided by the energy in the total char produced.<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">The ratio of the carbon mass in the total char produced to the total carbon mass in the fuel fed into the
stove.<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">The ratio of the carbon mass in the recoverable char to the total carbon mass in the fuel fed into the
stove. <o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">The ratio of the carbon mass in the recoverable char to the total carbon mass in the char produced.<o:p></o:p></span></li></ol>
<p class="MsoListParagraph"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">With respect to the energy efficiency, defined as fuel energy and work performed, producing char is not ‘work’, it is a byproduct of the work done (cooking).
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">If one wanted to report the fraction of energy not contained in the char produced that as made available to the cooking function, that would be a legitimate calculation.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">Unfortunately the WBT does not do this. The ‘deduction’ is of an indeterminate fraction of the energy in the char produced: either included with the ash (an over-estimate
as per WBT3.1) or an underestimate in the case of the tester recovering some portion of the total char and deducting the energy contained in it, either by estimation or measurement.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">One cannot rate the performance of a stove for regulatory purposes based on estimations of an indeterminate fraction of something.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">Comprehensive proposals have already been made for the determination of a two-stove cooking system which uses char produced as fuel in a second combustor. I realise
this is not what you intend with your char-sequestering proposal, but others have enquired about how such stove-pairs would be rated.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">The recent discussion about char produced in Indonesia would be a good example of supplying fuel in a two-stove system.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">Regards<br>
Crispin<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="FR" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Dear Ron,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="FR" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><i><span lang="FR">« Sorry but this test procedure will give only bad answers whenever there is anything more than an insignificant amount of charcoal. » </span></i><i><span lang="FR" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p></o:p></span></i></p>
<p class="MsoNormal"><span lang="FR" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">What do you define as a « bad answer »? Do you have an example of the CSI giving a « bad answer »?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="FR" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="FR" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">I thought there were no good or bad answers. Only valid or invalid ones.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="FR" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Results are results. Should they be thrown away if they don’t go your way, if they don’t show your technology in a good light? Shouldn’t you rather
be busy tweaking the technology rather than tweaking the results?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="FR" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="FR" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Best,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="FR" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="FR" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Xavier<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="FR" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="FR" style="font-size:10.0pt;font-family:"Tahoma",sans-serif">De :</span></b><span lang="FR" style="font-size:10.0pt;font-family:"Tahoma",sans-serif"> Ronal W. Larson [<a href="mailto:rongretlarson@comcast.net">mailto:rongretlarson@comcast.net</a>]
<br>
<b>Envoyé :</b> mercredi 20 décembre 2017 01:22<br>
<b>À :</b> Discussion of biomass; Xavier Brandao<br>
<b>Cc :</b> Crispin Pemberton-Pigott; kgharris<br>
<b>Objet :</b> Re: [Stoves] Going back to 3-Stone Fire [Was Re: Chinaandcookstoves]<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="FR"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="FR">Xavier, list et al:<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="FR"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span class="apple-tab-span"><span lang="FR"> </span>
</span><span lang="FR">Sorry but this test procedure will give only bad answers whenever there is anything more than an insignificant amount of charcoal. The word charcoal is mentioned twice on p 6 - but no suggestion that it be measured. (or maybe I didn’t
skim carefully enough and you can tell me where to look.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="FR"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span class="apple-tab-span"><span lang="FR"> </span>
</span><span lang="FR">I’m surprised that there have been no updates since 2012. Are you sure you sent me to the right place?<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="FR"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="FR">Ron<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="FR"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="FR"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="FR">On Dec 19, 2017, at 4:16 PM, Xavier Brandao <<a href="mailto:xav.brandao@gmail.com">xav.brandao@gmail.com</a>> wrote:<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="FR"><o:p> </o:p></span></p>
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<p class="MsoNormal"><i><span lang="FR">« If not using something very much like the present WBT (similar duration, similar pot sizes, water quantity, etc), what do the opponents recommend? »</span></i><span lang="FR"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="FR"><a href="https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdrive.google.com%2Fdrive%2Ffolders%2F0B5rmmRmIsdlnQlRQX3A1cXVOQ3M&data=02%7C01%7C%7C98f0bbd74d274735693408d54c920762%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636499112420743635&sdata=SVfy9m9k8H9q8yC22fcmi5O3OlgjffYqJKbk%2FGGhbnQ%3D&reserved=0"><span style="color:purple">https://drive.google.com/drive/folders/0B5rmmRmIsdlnQlRQX3A1cXVOQ3M</span></a><o:p></o:p></span></p>
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