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<body bgcolor="#FFFFFF" text="#000000">Dear Paul<br/><br/>Why do you think the Peko Pe is not in (mass) production in Uganda? Is it not a low cost and effective stove? <br/><br/>What is the thermal efficiency of the Quad, and can you give me the numbers that were used to calculate the result(s)? I am interested to see the fuel loading and alla that. Burn rate...<br/><br/>Thanks<br/>Crispin<br/><br/><hr/><div><b>From: </b> Paul Anderson <psanders@ilstu.edu>
</div><div><b>Date: </b>Tue, 23 Oct 2012 10:50:21 -0500</div><div><b>To: </b><crispinpigott@gmail.com></div><div><b>Cc: </b>Stoves<stoves@lists.bioenergylists.org>; Hugh McLaughlin<wastemin1@verizon.net>; James S. Schoner<jss@bitmaxim.com>; pwever@chipenergy.com<pwever@chipenergy.com></div><div><b>Subject: </b>Continuous feed of fuel -- Re: [Stoves] Very small stoves ...</div><div><br/></div>
<div class="moz-cite-prefix">Crispin and other Stovers,<br>
<br>
Subject line changed because the theme has changed. Some earlier
messages about this new thread are below (they were under the old
thread.)<br>
<br>
Vertical fuel feed by gravity is a key part of the "Dasifier" of
more than a decade ago (and described on the web). But it had
forced (induced) draft.<br>
<br>
I learned from Agua Das about it, and later was able (with a few
key changes) to make it natural draft, but not a perfect product.
I showed that at ETHOS 2006, and I have made smaller ones, even
down to the size of a one-gallon can. This evolved into the AVUD
gasifier as described in "Micro-Gasification: What it is and why
it works" published in Boiling Point. And that is the essence
behind the continuous feed biomass furnace of Chip Energy, with
mechanical feeding and forced air.<br>
<br>
My point is this: We (the generic "we" meaning many of us) know
how to do many of these things. But there simply is not enough
time and certainly no serious funding to press forward with these
efforts. I am now working to get the US$16 Mwoto Quad TLUD-ND
into mass production in Uganda. To do what we are discussing
about natural draft continuous feed small stoves is another
equally large or larger project, and to work on it could seriously
endanger all of my efforts in Uganda with TLUDs. In Uganda I
must do "business". Stove development and experimentation does
not get any financial support.<br>
<br>
From all that I can see (during 11 years working on small
cookstoves), there is not sufficient support for small innovative
efforts. So my focus has been on the TLUD technology, not the
small AVUD methods. <br>
<br>
Sorry that this ended up being a "Lament". There are just too
many things to do. And the early days on the Stoves Listserv we
would talk about such things as fuel feeding for small stoves, and
we did experiments. But now the pressure is for making millions
of stoves that exist, and pressure to NOT be distracted by
designing of stoves that should or could exist but do not have
proven track records. That is just the way that it is.<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>
On 10/23/2012 9:54 AM, Crispin Pemberton-Pigott wrote:<br>
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<blockquote
cite="mid:464351171-1351004066-cardhu_decombobulator_blackberry.rim.net-109431334-@b13.c10.bise6.blackberry"
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The Mayon Turbo Stove is the first commercially available stove I
saw that used a tap to feed and there are some complaints about
the need for attention to keep it going, partly because of the
rice hull fuel being so light and low power. The possibility of
using another feed method is attractive. <br>
<br>
So I am looking for a way to use the burning of the fuel right at
the hopper outlet to do the job of releasing fuel now and then or
'often'. It doesn't look good at the moment but it might! Never
assume anything. <br>
<br>
Alex I am booking to see you mid Nov as I have to collect a piano
from the Carrying Place area. <br>
<br>
Regards<br>
Crispin back in Jakarta
<hr>
<div><b>From: </b> Paul Anderson <a class="moz-txt-link-rfc2396E" href="mailto:psanders@ilstu.edu"><psanders@ilstu.edu></a>
</div>
<div><b>Date: </b>Tue, 23 Oct 2012 09:29:01 -0500</div>
<div><b>To: </b>Discussion of biomass cooking
stoves<a class="moz-txt-link-rfc2396E" href="mailto:stoves@lists.bioenergylists.org"><stoves@lists.bioenergylists.org></a></div>
<div><b>Cc: </b>Crispin
Pemberton-Pigott<a class="moz-txt-link-rfc2396E" href="mailto:crispinpigott@gmail.com"><crispinpigott@gmail.com></a>; Hugh
McLaughlin<a class="moz-txt-link-rfc2396E" href="mailto:wastemin1@verizon.net"><wastemin1@verizon.net></a></div>
<div><b>Subject: </b>Re: [Stoves] Very small stoves and reheating
food</div>
<div><br>
</div>
<div class="moz-cite-prefix">Crispin and Alex and all,<br>
<br>
Successful "dribble" or "trickle" feeding at very low cost will
be a great addition to small stove technology. <br>
<br>
Of course gravity is the least expensive. But "assisted
gravity" might be relatively low cost. I am thinking of a
small tapper or vibrator that can be set to giggle the fuel
chamber periodically or when some sensor sends a signal. <br>
<br>
Alternatively there could be some shape of rod that is inside
the fuel chamber. There are many ways to
giggle/wiggle/twist/tap/lift/drop to have minor movement of the
rod to assure the gravity flow of the fuel in the hopper.<br>
<br>
Alex is doing it the right way: Start with uniform fuels like
pellets or quality (screened) wood chips. When a method works
there, then start looking at the more difficult fuels to make
flow.<br>
<br>
Paul<br>
<br>
<pre class="moz-signature" cols="72">Paul S. Anderson, PhD aka "Dr TLUD"
Email: <a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="mailto:psanders@ilstu.edu">psanders@ilstu.edu</a> Skype: paultlud Phone: +1-309-452-7072
Website: <a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="http://www.drtlud.com">www.drtlud.com</a></pre>
On 10/22/2012 7:48 PM, Crispin Pemberton-Pigott wrote:<br>
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<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Dear
Paul<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Not
too fast there… that is what is exciting about Alex
English’s dribble feeder (I am calling it because that is
what it is doing). He is successful so far with wood
chips, pellets and by extension, any small fuel like nut
shells, coffee hulls etc.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I
am going to have a gander in November. It is the first <i>small</i>
gravity feeder that I have seen work well. There is no
reason it won’t work with rice hull if we get a bit
clever.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">You
fan (geddit)<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Crispin<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:#1F497D"
lang="EN-US">++++++<o:p></o:p></span></b></p>
<p class="MsoNormal">It is the words "feed ... continuously"
fuel that is a problem. The pellet stoves (heaters) are
acceptable and successful because the continuous feeding
of fuel is automated. No such luxury with inexpensive
stoves for economically poor people.<br>
<br>
Paul<br>
<br>
<o:p></o:p></p>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
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