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<div class="moz-cite-prefix">Crispin,<br>
<br>
<blockquote type="cite">Some TLUD's heat pretty much all the wood
at once (they vary). </blockquote>
Please describe in detail. I want to know what you call a TLUD
in this case.<br>
<br>
Paul<br>
<br>
<br>
<br>
<pre class="moz-signature" cols="72">Paul S. Anderson, PhD aka "Dr TLUD"
Email: <a class="moz-txt-link-abbreviated" href="mailto:psanders@ilstu.edu">psanders@ilstu.edu</a> Skype: paultlud Phone: +1-309-452-7072
Website: <a class="moz-txt-link-abbreviated" href="http://www.drtlud.com">www.drtlud.com</a></pre>
On 6/12/2013 11:04 AM, Crispin Pemberton-Pigott wrote:<br>
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<p class="MsoPlainText">Dear Dale<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">I believe it is easiest to burn wet wood
in a continuous feed fashion. I have had some recent
experience in Indonesia trying burn wet (pretty damp) wood in
a TLUD. Some TLUD's heat pretty much all the wood at once
(they vary). When that happens there is a huge burst of
moisture in the emissions. This is visible on the HPT data
quality check chart as depressed∑O<sub>2</sub> and ∑CO<sub>2</sub>
lines (they should depress in synch). The evaporation of all
the moisture early makes for problems later because then the
wood it so dry it won’t stop self-pyrolysing. In other words
if combustion conditions favour wet wood, later they do not
favour dry wood remaining.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Tom has some experience, as does
UK-Andrew in burning pretty wet biomass. The essential point
is to keep the primary combustion zone hot enough to run the
fire and still evaporate all that moisture. Heat recycling is
by far the easiest way to do that.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Good to hear from you. Any recent
experiments to repot? I have missed your great lab work.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Regards<br>
Crispin<o:p></o:p></p>
<p class="MsoPlainText"><span style="mso-fareast-language:EN-CA"
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span style="mso-fareast-language:EN-CA"
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span style="mso-fareast-language:EN-CA"
lang="EN-US">+++++++<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="mso-fareast-language:EN-CA"
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoPlainText">Have we ever looked at the question of
how to design a stove to burn wood that is higher in
moisture? It would seem that this is very important practical
issue, and that a stove that could burn wet wood would be very
popular. What makes a stove burn wet wood well or poorly?<o:p></o:p></p>
<p class="MsoPlainText">The only time I remember someone saying
something about this was Crispin, who I believe said recently
that preheating the primary air makes it possible to burn
wetter wood. This would be easy with a batch stove, harder
with continuous feed. Other than that, I can think of a
couple things that might help burn wetter wood. <o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Dale Andreatta <o:p></o:p></p>
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