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<div class="moz-cite-prefix">Dear Stovers, <br>
<br>
I received an direct inquiry for assistance. I think my reply
might be useful for others, so I have removed identifying
information and am sending the reply to all and a Blind Copy to
him.<br>
<br>
Dear (Friend),<br>
<br>
I have read your description (below) and viewed the photos (not
attached here, but similar to a large Ourja stove).<br>
<br>
I believe (am quite sure) that you might be starting the stove in
it TLUD mode with fuel ignited at the top, with fan assistance.
But then you are continuing to burn the char that was created, and
you are probably adding more fuel to get the 3 hour duration.<br>
<br>
Once the pyrolysis is finished, and the fire / heat is at the
bottom, it is no longer operating as a TLUD stove. Your stove is
essentially burning the char, with the assistance of forced air.
You have created a forge, with air being blown on the hot char.
That will destroy your stove (as you have described). That is NOT
a TLUD problem. <br>
<br>
Ceramic or cast iron are probably your only materials for a
solution.<br>
<br>
Note that the Ourja stove (by BP and now by First Energy) is quite
similar to your design, but smaller for residences. The Ourja
stove has a cast iron cup in the bottom. And it is glowing red
hot at the end of the cooking because it is a charcoal burning
stove (with forced air) that has made its own charcoal via the
TLUD process, and then produces more charcoal when additional
biomass fuel is slowly place on top of the hot char bed where it
will pyrolyze.<br>
<br>
Sincerely,<br>
<br>
Dr TLUD<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 2/10/2013 1:14 AM, Friend wrote:<br>
</div>
<blockquote
cite="mid:CAJXPp3EL+2MQy4EfuUi4ZH9b6EoAUM1eib76kVmzJi4BUDDnjQ@mail.gmail.com"
type="cite">
<div dir="ltr">Dear Dr Paul Anderson,
<div><br>
</div>
<div> Thankyou for your reply.</div>
<div><br>
</div>
<div>I am from (developing country). i am doing R&D on
Biomass smokeless stove from last 1 year . i have designed
stove for commercial application.</div>
<div>i have placed few stoves in hotels for testing last month .
i am facing lots of problem in combustion chamber. within a
month the bottom layer of the combustion chamber has
completely melted. </div>
<div><br>
</div>
<div>
<div><font face="arial, sans-serif">It is Top lit up
draft(TLUD) forced draft biomass cook stove with 2
fans,one for primary and another for secondary air. the
combustion chamber which we have used is SS 304 (3mm
thickness). the pellet capacity is 9 KG , which burns for
2 hours - 3 hours . </font></div>
<div><font face="arial, sans-serif"><br>
</font></div>
<div><font face="arial, sans-serif"> Please help me in
designing better stove . i need your help . will be
waiting for your reply.</font></div>
<div><font face="arial, sans-serif"><br>
</font></div>
<div style=""><font face="arial, sans-serif">Thanks &
Regards</font></div>
<div style=""><font face="arial, sans-serif">(Friend)</font></div>
</div>
<div class="gmail_extra"><br>
<br>
</div>
</div>
</blockquote>
<br>
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