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<body class='hmmessage'><div dir='ltr'>Dear Ron,<BR>To light a proper Natural Draft Gasifier, you just need a proper starter.<BR> <BR>Pellet diped into kerosine will do, or just simple woodshaveings.<BR> <BR>The pellet in a Natural Draft gasfier "does not burn" as such, it just turns into (bio)char and only the gases burns about 5 to 10 cm above the biomass .<BR>No need to ingnite the pellet and face the "problems " or challages as for a Rocket stove.<BR> <BR>This "brand new" technolgy, known for centuries, compared to the open three stone fire - light from the top to avoid any hassard and hazzel, which will solve most issues conserning smoke and toxic emissions.<BR> <BR>Just remember, the more dry and dense fuel, the better...................... <BR> <BR>Otto <br> <BR><div><hr id="stopSpelling">From: rongretlarson@comcast.net<br>Date: Sat, 15 Mar 2014 13:12:02 -0600<br>To: stoves@lists.bioenergylists.org<br>Subject: Re: [Stoves] Pellets in Uganda was Re: Cuber and size of densifying machines.<br><br>Dean et al<div><br></div><div><span class="ecxApple-tab-span" style="white-space: pre;"> </span>Was this poor lighting performance in a Rocket or TLUD or other? Do you (or anyone) think it should make a difference? And would 1/4” pellets of same density have the same problem? If not - what is the reason for a size difference?</div><div><br></div><div><span class="ecxApple-tab-span" style="white-space: pre;"> </span>Anyone using a pellet stove for space heating able to say anything on problems with larger and/or more dense pellets? Are there warnings on the size of pellets for pellet-type space heaters?</div><div><br></div><div>Ron</div><div><br></div><div><br></div><div><br><div><div>On Mar 15, 2014, at 11:18 AM, Dean Still <<a href="mailto:deankstill@gmail.com">deankstill@gmail.com</a>> wrote:</div><br class="ecxApple-interchange-newline"><blockquote><div dir="ltr">Hi Paul,<div><br></div><div>The pellets were about one inch in diameter and very dense. Hard to light and went out easily.</div><div><br></div><div>Best,</div><div><br></div><div>Dean</div></div><div class="ecxgmail_extra">
<br><br><div class="ecxgmail_quote">On Sat, Mar 15, 2014 at 8:37 AM, Paul Anderson <span dir="ltr"><<a href="mailto:psanders@ilstu.edu" target="_blank">psanders@ilstu.edu</a>></span> wrote:<br><blockquote class="ecxgmail_quote" style="padding-left: 1ex; border-left-color: rgb(204, 204, 204); border-left-width: 1px; border-left-style: solid;">
<div>
<div>Dean,<br>
<br>
Please tell us about those pellets: characteristics and source
and used in what stove(s). The experience by Awamu in Uganda
does not agree with your statement. But there could be different
sources and different stoves.<br>
<br>
Paul<br>
<br>
<pre>Doc / Dr TLUD / Prof. Paul S. Anderson, PhD
Email: <a href="mailto:psanders@ilstu.edu" target="_blank">psanders@ilstu.edu</a>
Skype: paultlud Phone: <a target="_blank">+1-309-452-7072</a>
Website: <a href="http://www.drtlud.com/" target="_blank">www.drtlud.com</a></pre>
On 3/6/2014 1:20 PM, Dean Still wrote:<br>
</div>
<blockquote>
<div dir="ltr">Hi Tom,
<div><br>
</div>
<div>In Uganda the pellets were too dense and were hard to
light. Do you know the density of USA heating stove pellets?</div>
<div><br>
</div>
<div>Best,</div>
<div><br>
</div>
<div>Dean</div>
</div>
<div class="ecxgmail_extra"><br>
<br>
<div class="ecxgmail_quote">On Thu, Mar 6, 2014 at 11:02 AM, Tom
Miles <span dir="ltr"><<a href="mailto:tmiles@trmiles.com" target="_blank">tmiles@trmiles.com</a>></span>
wrote:<br>
<blockquote class="ecxgmail_quote" style="padding-left: 1ex; border-left-color: rgb(204, 204, 204); border-left-width: 1px; border-left-style: solid;">
<div lang="EN-US">
<div><p class="ecxMsoNormal"><span style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'>Richard,</span></p><div><span style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'> </span><br class="ecxwebkit-block-placeholder"></div><p class="ecxMsoNormal"><span style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'>You
probably mean 0.6 g/cm3 (37 lb/ft3) which is very
good that’s better than most commercial wood
pellets. For reference the dry density of sawdust is
often about .160 g/cm3 (or 10 lb/ft3). The loose
density of straw is about 0.08 g/cm3 or (5 lb/ft3).
The press roll on a pellet mill exerts about 142
bars (2000 psig). If you can get those densities by
selecting materials, wetting, pressing at 12 bar and
drying you are doing very well. </span></p><p class="ecxMsoNormal"><span style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'><br>
Tom</span></p><p class="ecxMsoNormal"><a name="144c664b24428537_14498c779ba49ea1__MailEndCompose" target="_blank"><span style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'> </span></a></p>
<div>
<div style="border-width: 1pt medium medium; border-style: solid none none; border-color: rgb(181, 196, 223) currentColor currentColor; padding: 3pt 0in 0in;"><p class="ecxMsoNormal"><b><span style='font-family: "Tahoma","sans-serif"; font-size: 10pt;'>From:</span></b><span style='font-family: "Tahoma","sans-serif"; font-size: 10pt;'>
Stoves [mailto:<a href="mailto:stoves-bounces@lists.bioenergylists.org" target="_blank">stoves-bounces@lists.bioenergylists.org</a>]
<b>On Behalf Of </b>Legacy Found<br>
<b>Sent:</b> Thursday, March 06, 2014 10:46 AM<br>
<b>To:</b> Discussion of biomass cooking stoves<br>
<b>Subject:</b> Re: [Stoves] Cuber and size of
densifying machines. (no longer Re: The wood and
char and fuel "debate" )</span></p>
</div>
</div><div> <br class="ecxwebkit-block-placeholder"></div>
<div><p class="ecxMsoNormal">Crispin, what densities are you
seeking. We have seen densities of up to 0.6kg/cm^3
by use of really fine granular material charcoal
sawdust and certain other ag residues as infiller in
hand presses generating only about 12 bars pressure.</p>
</div>
<div><p class="ecxMsoNormal">I have not attempted pellet
production but have no doubt that high pressure is
not needed: Rather its more about attention to
blend particle density and size and variations
between these (sorting coefficients) that makes the
difference density wise. </p>
</div>
<div><p class="ecxMsoNormal">May look into it if anybody is
interested in the fuel pellet world.</p>
</div>
<div><p class="ecxMsoNormal">Richard<br>
<br>
Sent from my iPhone</p>
</div>
<div><p class="ecxMsoNormal">
<br>
On Mar 6, 2014, at 11:38, Crispin Pembert-Pigott
<<a href="mailto:crispinpigott@outlook.com" target="_blank">crispinpigott@outlook.com</a>>
wrote:</p>
</div>
<blockquote>
<div>
<div><p class="ecxMsoNormal"><span style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'>Dear
Friends</span></p><div><span style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'> </span><br class="ecxwebkit-block-placeholder"></div><p class="ecxMsoNormal"><span style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'>I
agree with Dean on this score. The air flow
through the pellets strongly affects the way
they burn if the device is constructed such
that the fuel contributes a significant
element of air control.</span></p><div><span style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'> </span><br class="ecxwebkit-block-placeholder"></div><p class="ecxMsoNormal"><span style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'>These
devices</span></p><p class="ecxMsoNormal"><image002.jpg></p><div><span style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'> </span><br class="ecxwebkit-block-placeholder"></div><p class="ecxMsoNormal">
<span style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'>Are
‘cubers’ in that they are producing densified
lumps that can be put into a stove. But they
will work best in a large stove such as is
used in China for space heating and cooking.
The input material is straw and other stover.</span></p><div><span style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'> </span><br class="ecxwebkit-block-placeholder"></div><p class="ecxMsoNormal"><span style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'>The
mechanism is an eccentric roller running
inside a perforated cage at maybe 60-100 RPM.
As Tom notes, power consumption is about 110
kW.</span></p><div><span style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'> </span><br class="ecxwebkit-block-placeholder"></div><p class="ecxMsoNormal"><span style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'>So
far I don’t think the product is economically
viable as there is a subsidy involved. What we
need is a breakthrough technology that will
make densified fuel without the need for heat.</span></p><div><span style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'> </span><br class="ecxwebkit-block-placeholder"></div><p class="ecxMsoNormal"><span style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'>Regards</span></p><p class="ecxMsoNormal"><span style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'>Crispin</span></p><div><span style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'> </span><br class="ecxwebkit-block-placeholder"></div><p class="ecxMsoNormal"><b><span style='font-family: "Calibri","sans-serif"; font-size: 11pt;'> </span></b></p><div><span style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'> </span><br class="ecxwebkit-block-placeholder"></div>
<div><p class="ecxMsoNormal">Hi Paul,</p>
<div><div> <br class="ecxwebkit-block-placeholder"></div>
</div>
<div><p class="ecxMsoNormal">I have seen the very
small pellets sold for heating stoves in the
US burn very cleanly. Larger sized pellets
did not burn as cleanly. </p>
</div>
<div><div> <br class="ecxwebkit-block-placeholder"></div>
</div>
<div><p class="ecxMsoNormal">Best,</p>
</div>
<div><div> <br class="ecxwebkit-block-placeholder"></div>
</div>
<div><p class="ecxMsoNormal">Dean</p>
</div>
</div>
</div>
</div>
</blockquote>
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