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<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Dear Paul and Julien<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">I am responding to Paul’s comments on Julien’s earlier message.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal">On Dec 7, 2017, at 6:51 AM, Paul Anderson <<a href="mailto:psanders@ilstu.edu">psanders@ilstu.edu</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">> 1. The thermal mass is estracting heat, meaning cooler gases inside the chamber, with risk of insufficient temperature for ignition at the top, especially when nearing the end of pyrolysis.<o:p></o:p></p>
<p class="MsoNormal" style="margin-right:36.0pt"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-right:36.0pt">Before anyone worries about heat going into the stove body, please perform the trivial calculation about
<i>how much</i> heat we are talking about. Just because heat goes into a stove body does not mean a) it is significant, b) that it happens at a time that affects performance of the cooking experience, c) that it is not returned later in the session (which is
cooking behaviour-dependent.) Yes, there is heat invested in the stove and usually it is a loss, but the other features of the stove may not only recover that heat through other energy paths, it may make the stove far more accessible by being cheap and easy
to make from local materials.<o:p></o:p></p>
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2. The concrete (or ceramic) inner cylinder does not have any of the side holes (24 in the metal version). Such holes allow for some "pilot light" effect after the char level is below a hole.
<o:p></o:p></p>
<p class="MsoNormal" style="margin-right:36.0pt"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-right:36.0pt">Dr Nurhuda’s very successful TLUD stove had such pilots sprinkled around the fuel chamber. The Vesto uses three holes only, and the purpose is to maintain pilot lights to ensure the flame never goes out. They
are placed in a way that guarantees a small portion of char is burned and there is never a need to relight because of a gust of wind.<o:p></o:p></p>
<p class="MsoNormal" style="margin-right:36.0pt">Regards<o:p></o:p></p>
<p class="MsoNormal" style="margin-right:36.0pt">Crispin<o:p></o:p></p>
<p class="MsoNormal" style="margin-right:36.0pt"><o:p> </o:p></p>
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