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<div class="moz-cite-prefix">On 24/10/2012 4:56 AM, Crispin
Pemberton-Pigott wrote:<br>
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<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Dear
Alex</span></p>
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Crispin,<br>
<blockquote cite="mid:04c401cdb1c5$765889c0$63099d40$@gmail.com"
type="cite">
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<p class="MsoNormal"><span
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<p class="MsoNormal"><span
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<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I
get </span><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">≈</span><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">3
kW for that burn rate. Is that correct? Ideal for single pot
cooking.</span></p>
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</blockquote>
That is close to a minimum, so not ideal for focused single pot
cooking. Works well for heating and cooking together. <br>
<blockquote cite="mid:04c401cdb1c5$765889c0$63099d40$@gmail.com"
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<p class="MsoNormal"><span
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<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">To
develop your comment to Richard about the air flow, cover or
not, I understand from Tom Reed that the superficial
velocity is the marker for a fire occurring systematically
in the hopper or not. If the air flow through the fuel is
above some limit, the heat will not rise in the hopper. Yes?</span></p>
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Pellets allow for a very even or consistent flow of air with no
channeling. This does cool the pellets but at this SV (superficial
velocity), without the concurrent pellet flow, the fire would creep
up into the fuel supply, towards the air. I suppose there is an SV
that would extinguish the fire. The pressure drop across the fuel at
this burn rate is around 0.02"WC. <br>
It may not change much at higher burn rates. There are four air
introductions, under chimney 'suction' if one is changed the others
also change. I use a funnel in funnel approach which limits the
pellet column depth for pressure drop and allows a much larger bin
above. This also buts a brake on thermal conductivity through the
structures. The larger bin could have a sealing lid. In fact I use a
lid to reduce air flow, SV, when burning wood chips.<br>
<br>
I like SV because it allows me to throw around technical terms
superficially and not include numbers:) <br>
<br>
<br>
Alex<br>
<br>
<blockquote cite="mid:04c401cdb1c5$765889c0$63099d40$@gmail.com"
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<p class="MsoNormal"><span
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<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Regards<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Crispin<o:p></o:p></span></p>
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