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<div class="moz-cite-prefix">Dear Stovers and especially to
Crispin, (and to the Biochar Listserv for separate discussion
there)<br>
<br>
Crispin's comments below are enlightening and I hope that my reply
can clarify the question.<br>
<br>
On 9/5/2013 1:15 AM, Crispin Pemberton-Pigott wrote:<br>
</div>
<blockquote cite="mid:073401cea9ff$63992aa0$2acb7fe0$@gmail.com"
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<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US">Dear
Paul A<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US">Open
fires can make and use char. This is not something new or
unusual. </span></p>
</div>
</blockquote>
True, and they utilize CONCURRENT making and burning of the char in
the same location. <br>
<br>
What is necessary is a change of mind-set that acknowledges the
distinction when the MAKING of the char is clearly separate in both
time and space from the BURNING of the char. THAT is unusual and
relatively new in discussions of stoves.<br>
<br>
That distinction is of fundamental importance!! Until that is
realized and accepted as being truly distinctive (not found in
normal fires and normal cookstoves), there will be insufficient
appreciation of its importance. It clearly takes a long time to
get this message across.<br>
<br>
<blockquote cite="mid:073401cea9ff$63992aa0$2acb7fe0$@gmail.com"
type="cite">
<div class="WordSection1">
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US">What
is unusual is a stove that makes a lot of char that cannot
burn it. </span></p>
</div>
</blockquote>
"Cannot" is incorrect.<br>
<br>
It is precisely the making of the char AND THE ABILITY TO
INTENTIONALLY BURN IT SEPARATELY (OR SAVE IT) that is what is so
important. <br>
<br>
And it is not that it CANNOT burn it, but that a proper TLUD stove
would burn the char ONLY after all of the char was created, not
during the creation of the char.<br>
<br>
And then the issue is that the produced char should NOT be burned in
the same device because:<br>
A. High heat from char burning (as in a forge) is not good
for the materials of the stove body.<br>
B. The burning of the char (at the bottom of the stove under
a pile of char) is rather too far from the use of the heat, so that
heat is not being optimized. <br>
Therefore, users are encouraged to either burn the char in a
different stove, or to extinguish the char and consider using it as
biochar.<br>
<br>
And perhaps (still needing scientific study) that distinctive
characteristic is a crucial factor that permits properly made and
operated TLUD stoves to be so low in emissions. <br>
One hypothesis is that the "ash content" of the raw biomass is
mostly held in the char (not release during the pyrolysis stage).<br>
Second hypothesis is that the "batch" of fuel is rather stationary,
being different from the frequently movement of the fuel pieces in
stoves that have fuel sticks pushed into the sides.<br>
<br>
<blockquote cite="mid:073401cea9ff$63992aa0$2acb7fe0$@gmail.com"
type="cite">
<div class="WordSection1">
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US">It
is unusual enough that is has the likes of me and Jim
scrambling around to find ways to properly report their
performance. <o:p></o:p></span></p>
<div>
<p class="MsoNormal"><span style="color:#1F497D"></span><br>
</p>
</div>
</div>
</blockquote>
The enthusiasts for TLUD pyrolytic char-producing stoves are
extremely grateful for Jim and Crispin and others who are seeking "<span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US">to
find ways to properly report their performance</span>". Sorry if
you are scrambling.<br>
<br>
I see no need to confuse this discussion with references to other
innovative stove technologies that may or may not have similarities
with the TLUD micro-gasifier technology. Let those stoves be
discussed on their own merits and in separate messages.<br>
<br>
Paul<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>
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