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<div class="moz-cite-prefix">On 08/12/2012 12:25 AM, Crispin
Pemberton-Pigott wrote:<br>
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<div class="WordSection1">Dear Crispin,<span style="color:#1F497D"><o:p></o:p></span>
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<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">What
was the diameter of the chamber?</span></p>
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30 cm.<br>
<blockquote cite="mid:0a5501cdd504$783299e0$6897cda0$@gmail.com"
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<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Do
you have a good idea what the burn rate was? </span></p>
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I'll guess 7- 8kw, but that is an estimate based on assumptions.
Sound familiar?<br>
<blockquote cite="mid:0a5501cdd504$783299e0$6897cda0$@gmail.com"
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<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I
realise the calculation of the power output per unit area
will be difficult to get precisely but I’d like some idea.
Operating at a low level sets the low power limit for
stove characterisation and the determination of the Turn
Down Ratio of a stove.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I
am thinking ‘warming’ power for long, low cooking.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Then,
for the same chamber, based on your experience what would
the maximum burn rate be? As the upper limit is
constrained by draft through the system the rate is a
statement about <i>your</i> system, but still, what sort
of controllability did you obtain for the power level?</span></p>
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Perhaps 12 kw.<br>
<br>
For my test burner on natural draft the burn rate (or pyrolysis
front downward movement rate) is 6-10cm/hr. Higher if you can up
the primary air. Josh should be able to tell us what that was for
his forced air tests. I once pushed the BIG-TOP hard with a high
pressure blower but I didn't record the rate. Sounded like a rocket
though. At some point we fluidise the bed.<br>
<br>
Alex<br>
<blockquote cite="mid:0a5501cdd504$783299e0$6897cda0$@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">Thanks<br>
Crispin<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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