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Kirk,<br>
<br>
Nice work!!!! Kevin Adair is doing some venturi additions also.
<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>
<div class="moz-cite-prefix">On 10/7/2015 5:09 PM, kgharris wrote:<br>
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<div><font size="2" face="Arial">Roberto,</font></div>
<div> </div>
<div><font size="2" face="Arial">Nice. I would like to see test
results for particulates. It should be very clean. It looks
like it is loosely based on Crispins flame tube design with
holes added in the tube where the Venturi low pressure area
is. The holes are at the bottom of the burner, so there is
better draft and a good burning area above. If I understand
correctly Crispin is using the tube differently, to
concentrate the heat and increase the dwell time for the flame
in that hot environment. His secondary air is all added
before the flame tube. Your design looks more compact and
perhaps would be a better choice for a TLUD. </font></div>
<div> </div>
<div><font size="2" face="Arial">There is a limit to how much gas
the burner can handle. When the foil is removed and more
primary air is added the burner is overloaded with gas and a
tall diffusion flame forms. I have been trying to handle this
problem by adding more mixing capability, and have had some
improvment, but further work is needed. The problem with the
mixing tubes I am using is that along the edges of the
combustor, the air exiting the tubes exits at an angle instead
of straight out. This holds the gasses below the burner along
the edges, and adds to blowing them to the center, overloading
the center of the mixer and wasting air at the edges of the
combustor. This would not be a problem with your design. You
might be able to use two or three of theses mixers side by
side to gain a clean higher fire power. </font></div>
<div> </div>
<div><font size="2" face="Arial">The concentrator ring is intended
to mix the wood gas and air, and the Venturi mixer is intended
to mix the wood gas and the air, so you have a duplicate
mixing system. I am not saying good or bad, just something I
notice. </font></div>
<div> </div>
<div><font size="2" face="Arial">I see Julian has expressed some
doubts about the Venturi concept. Good for him. I would be
very happy if someone with adiquate equipment and technical
ability proved or disproved the TLUD Venturi concept, either
way. I perhaps will have to bite the bullet and buy a
manometer with the ability to measure down to .001 inch of
water column. My rather primative home made manometer did
show a slight pressure drop at the mixer, but not enough to
get any measurments. Our local college science department
didn't seem to be interested.</font></div>
<div> </div>
<div><font size="2" face="Arial">Attached are some photos of the
primary control valve I am currently using very successfully.
It looks like something similar might work for you.</font></div>
<div> </div>
<div><font size="2" face="Arial">Good work Roberto, </font></div>
<div> </div>
<div><font size="2" face="Arial">Kirk</font></div>
<blockquote style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT:
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<div style="FONT: 10pt arial">----- Original Message ----- </div>
<div style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color:
black"><b>From:</b> <a moz-do-not-send="true"
title="roberto.poehlmann@gmail.com"
href="mailto:roberto.poehlmann@gmail.com">Roberto Poehlmann</a>
</div>
<div style="FONT: 10pt arial"><b>To:</b> <a
moz-do-not-send="true"
title="stoves@lists.bioenergylists.org"
href="mailto:stoves@lists.bioenergylists.org"><a class="moz-txt-link-abbreviated" href="mailto:stoves@lists.bioenergylists.org">stoves@lists.bioenergylists.org</a></a>
</div>
<div style="FONT: 10pt arial"><b>Sent:</b> Tuesday, October 06,
2015 5:53 PM</div>
<div style="FONT: 10pt arial"><b>Subject:</b> [Stoves] TLUD
pellets stove with a venturi burner.</div>
<div><br>
</div>
<div dir="ltr">
<div>Hi,</div>
<div><br>
</div>
<div>This is a video of one of my prototypes of a TLUD pellet
stove.</div>
<div><br>
</div>
<div>The difference with a "normal" TLUD burner, is that it
has a 3 inch tube with secondary air holes after the
concentrator ring.<br>
</div>
<div>On top of the the tube, i put a cone to expand the path
of the gases, to shorten the flame, and to have a little
internal chimney for draft.</div>
<div><br>
</div>
<div>One advantage of this burner, is that you can also burn
all of the charcoal made at the pyrolysis stage, with a nice
secondary blue flame (if you wish) .</div>
<div><br>
</div>
<div><a moz-do-not-send="true"
href="https://youtu.be/uXMeGcZEYX0">https://youtu.be/uXMeGcZEYX0</a><br>
</div>
<br clear="all">
<div>
<div class="gmail_signature">Greetings<br>
Roberto Poehlmann</div>
</div>
<div class="gmail_signature">Valdivia, Chile.</div>
</div>
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