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<div class="moz-cite-prefix">Dear Huck and all,<br>
<br>
I am delighted to see your progress and determination. <br>
<br>
I hope that others will comment also. There is certainly room for
alternative thoughts to what I am replying. This all refers to
TLUD-ND, that is, the Natural Draft units. And we are not
focusing on the issue of costs of materials and labor to
accomplish Huck's design considerations.<br>
<br>
1. The Troika design is essentially a Champion TLUD (as
represented by the units from Servals in Chennai) but with legs
that serve as handles. The air flows are basically the same in
both designs.<br>
<br>
2. With fuel chamber diameters under 8 inches (20 cm), a single
entry point for the primary air has seemed quite adequate for the
primary air to spread around the entire grate area. And a
single position is MUCH easier to control than if there are
multiple points of entry.<br>
<br>
3. Secondary air is both easy and tricky. Easy because it seems
to be somewhat "self-regulating" with the only control factor
being the gap (or a set of holes) at the top of the fuel chamber.
We need good mixing of SA with the combustible gases, with efforts
to have very clean combustion. <br>
<br>
However, SA is tricky because (as Crispin has recently measured at
Servals) an EXCESS of secondary air can reduce efficiency by
diluting the flame and therefore lowering the temperature of the
gases that reach the pot. But too much reduction is an
invitation to have poor combustion. <br>
<br>
Therefore, I would recommend efforts to control the secondary air
in relation to the gap or holes under the concentrator disk, and
not spend money on limiting the entry of the air into the bottom
of the annulus between the two cylinders.<br>
<br>
For this topic, I hope that the work of Kirk Harris and Jock Jill
and Julian Winter and others will be considered for incorporation
into you designs.<br>
<br>
4. Of course, so many things change when even a little forced air
(FA) is applied. And that is why I have favored SINGLE entry
points for the primary air and the secondary air. Force air will
be increasingly more available, and its impacts are highly
advantageous in TLUD stoves.<br>
<br>
##### The importance of sharing this discussion and the resultant
experiments and final outcomes is SOOOOO important. The past
decade of constant advancement and increasing recognition of TLUD
microgasification has been based on sharing. In general, the
smaller the entity, the more open is the sharing. Because some
substantially bigger participants with grants have been active, we
can hope for their contributions also, eventually. But for now,
we rely on the individual efforts of increasing numbers of TLUD
practitioners. <br>
<br>
And I thank you all!!!!!!<br>
<br>
Paul<br>
<pre class="moz-signature" cols="72">Doc / Dr TLUD / Prof. Paul S. Anderson, PhD
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 10/8/2014 10:48 PM, Huck Rorick wrote:<br>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Hi Paul,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">For our
housing project in Cameroon we have been using Serval’s
version of your champion TLUD as a model. We would be
undertaking to make several different stove models locally
including something similar to the Champion. I was looking
at one possible modification and wanted to get your
feedback.<o:p></o:p></span></p>
<span style="font-size:12.0pt"><o:p></o:p></span>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:12.0pt;font-family:"Arial","sans-serif";color:#400040">Huck
Rorick</span><span
style="font-size:12.0pt;font-family:"Times New
Roman","serif""><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Arial","sans-serif";color:gray">Executive
Director<br>
Groundwork Institute<br>
2640 Silvercrest Street<br>
Pinole, CA 94564<br>
Phone: 510-222-4111<br>
email: </span><span style="font-size:12.0pt"><a
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href="mailto:huckrorick@groundwork.org"><span
style="font-family:"Arial","sans-serif";color:blue">huckrorick@groundwork.org</span></a></span><span
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Roman","serif";color:gray"><br>
</span><span
style="font-size:12.0pt;font-family:"Arial","sans-serif";color:gray">Website:
</span><u><span
style="font-size:12.0pt;font-family:"Arial","sans-serif";color:blue"><a
moz-do-not-send="true" href="http://www.groundwork.org"><span
style="color:blue">www.groundwork.org</span></a></span></u><span
style="font-size:12.0pt;font-family:"Arial","sans-serif"">
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<p class="MsoNormal"><o:p> </o:p></p>
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