Dear Ron and List:<br><br>Ron's remark is well taken and I'll add a little more.<br><br>I have been making a LOT of charcoal using the PYROMID method: Stack up a lot wood (as from cutting up a brush pile for instance) in a DENSE pyramid, any size. Use tinder to light the apex of the pyramid at the top. <br>
<br>The reaction zone will quitely ignite layer after layer with the upper layers of charcoal protected from burning by the expanded layer of deoxygenated ("dephlogisticated") gas rising by natural convection. Avoid windy days that would blow the protective gas sideways. <br>
<br>Stand by with a hose of watering cans to wet any char that extends beyond the protection and to put out the whole pile when done. After you think it's out, think again because small embers can hide and come alive again. <br>
<br>We are having a big charcoal roast near Amherst April 28th at 4 PM.<br><br>Tom Reed<br><br>Pyrologist <br><br><div class="gmail_quote">On Wed, Apr 13, 2011 at 6:28 PM, <span dir="ltr"><<a href="mailto:rongretlarson@comcast.net">rongretlarson@comcast.net</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><div><div style="font-family: Arial; font-size: 12pt; color: rgb(0, 0, 0);">Hi list:<br><br>
This is to concur with Tom's remarks. <br><br> The other important element of TLUDs, that I often see missing in their definition, is the [easy, trivial] ability to control primary air flow - to achieve a sizeable turndown ratio. Much fuel is wasted when there is either too much or too little primary air.<br>
<br>Ron<div class="im"><br><br><br>----- Original Message -----<br>From: "Thomas Reed" <<a href="mailto:tombreed2009@gmail.com" target="_blank">tombreed2009@gmail.com</a>><br>To: "Discussion of biomass cooking stoves" <<a href="mailto:stoves@lists.bioenergylists.org" target="_blank">stoves@lists.bioenergylists.org</a>>, "paal wendelbo" <<a href="mailto:paaw@online.no" target="_blank">paaw@online.no</a>>, "Paul S Anderson" <<a href="mailto:psanders@ilstu.edu" target="_blank">psanders@ilstu.edu</a>>, "Hugh McLaughlin" <<a href="mailto:alternaenergy@charter.net" target="_blank">alternaenergy@charter.net</a>><br>
</div><div class="im">Sent: Wednesday, April 13, 2011 4:05:04 PM<br>Subject: Re: [Stoves] [ Misuderstanding of TLUD stoves Re: Refuelable TLUD<br><br></div><div><div></div><div class="h5">Dear Paal and All<br><br>I think that Paal has missed the point of TLUDs. When a pile of wood starts burning at the bottom, most of the fuel will be pyrolysed as the heat passes up through the bed and burned without mixing with air. <br>
<br>When the fire is lighted on TOP of the fuel, the volatiles burn, leaving a layer of charcoal. Enough of this charcoal will burn to insure drying and ignition of the second layer, same, same, until all of the volatiles from the whole charge have burned, leaving the charcoal behind. <br>
<br>Bottom lighting is char burning, volatiles escaping.<br>Top lighting is volatiles burning, charcoal preserved.<br><br>So TLUD is not connected to the fuel, but to the manner in which air meets the fuel. <br><br><><><><br>
<br>Conventional downdraft gasification uses the draft of an engine to pull air down through a charge of first wood, then charcoal, so can be thought of as a Bottom Lit Downdraft instead of a Top Lit Updraft. That is why I originally called it an "inverted downdraft gasifier" back in 1985 when I first ran it.<br>
<br>Words are important.<br><br>TOM REED <br>Pyrologist<br><br><div class="gmail_quote">On Mon, Mar 7, 2011 at 5:05 AM, Paal wendelbo <span dir="ltr"><<a href="mailto:paaw@online.no" target="_blank">paaw@online.no</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div>
<div><font size="1">
<p style="margin: 0cm 0cm 0pt;" class="MsoNormal"><span style="font-size: 10pt;" lang="EN-GB">Stovers.
</span></p>
<p style="text-indent: 35.4pt; margin: 0cm 0cm 0pt;" class="MsoNormal"><span style="font-size: 10pt;" lang="EN-GB">As far I can see
the name TLUD is connected to the fuel and the combustion, and can not be a name
of a certain stove. LPG, alcohol and kerosene stoves are all TLUDs and can not
be ignited from underneath Reeds, Andersons and Peko Pe will not be TLUDs if some
drops of kerosene go through the fuel and ignite at the bottom. The Champion
stove can even be ignited from underneath, which probably most user will <span> </span>do if they don’t have access to kerosene
since it is more simple. And if you ad some fuel during time of combustion, is
no longer a TLUD.</span></p>
<p style="margin: 0cm 0cm 0pt;" class="MsoNormal"><span style="font-size: 10pt;" lang="EN-GB"><span> </span><span>
</span>TLBM- NF and TLBM-FD could probably do, BM stand for biomass, then
charcoal and woodstoves will be included in the family if fuel are ignited on
top and the refilling is from underneath the glowing. .</span></p>
<p style="margin: 0cm 0cm 0pt;" class="MsoNormal"><span style="font-size: 10pt;" lang="EN-GB"><span> </span><span>
</span>The Peko Pe was <span> </span><span> </span>originally called Multi Fuel Combustion
System MFCS,</span></p>
<p style="margin: 0cm 0cm 0pt;" class="MsoNormal"><span style="font-size: 10pt;" lang="EN-GB">due to the fact
more <span> </span>types of biomass fuel could be
utilized.and there was no other way to ignite than on top</span></p>
<p style="margin: 0cm 0cm 0pt;" class="MsoNormal"><span style="font-size: 10pt;" lang="EN-GB"> </span></p>
<p style="margin: 0cm 0cm 0pt;" class="MsoNormal"><span style="font-size: 10pt;" lang="EN-GB">With regards Paal
W</span></p>
<p style="margin: 0cm 0cm 0pt;" class="MsoNormal"><span style="font-size: 10pt;" lang="EN-GB"> </span></p></font></div></div>
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