<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Hi Paul,<div class=""><br class=""></div><div class="">We haven’t really communicated since the USBI conference about potential projects in Mexico, but you recent post on the stoves list about tortilla cookers prompted us to share our progress on that front.</div><div class=""><br class=""></div><div class="">As a reintroduction, Bill Knauss first started to play around with TLUDs about five years ago, primarily to create a stove that poor families in Palomas, MX, could use for cooking and space heating. We have moved into somewhat larger devices that are continuous feed TLUDs, but have still been refining the small batch units. Here is the charbecue we had at Aprovecho last August:</div><div class=""><br class=""></div><div class=""><img apple-inline="yes" id="BDEB24A4-E848-4DB1-930B-42F5A7D0D7A7" class="" src="cid:41D838BB-D8C1-4CED-A749-5C2501393F1C@PK5001Z"></div><div class=""><br class=""></div><div class="">The general concept is a TLUD that serves as a core unit with a range of “attachments” that fit to it. One of Bill’s early variations was a plancha: <a href="https://www.youtube.com/watch?v=8z6q3erCzNo" class="">https://www.youtube.com/watch?v=8z6q3erCzNo</a></div><div class=""><br class=""></div><div class="">We have an air-to-air heat exchanger, or a water heating exchanger that simply sits on top in place of the barbecue. The air heater is shown, but the water heater uses the same core.</div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><img apple-inline="yes" id="906C97ED-35A7-48DF-AAD9-F2DC5C457E1C" class="" src="cid:DBC1E396-2438-4810-93B1-E6B9733D6E6A@PK5001Z"></div><div class=""><br class=""></div><div class="">Inspired by the “magic wok” at the stove camp, we built a version that is specific to highly efficient bean cooking using a pressure cooker. We can cook beans from an dry, unsoaked starting condition to finished in 15 minutes! This one can easily be vented to the outside. The pressure cooker sits in an insulated well and is surrounded by the hot flue gases for efficient heat transfer. The insulation is biochar.</div><div class=""><br class=""></div><div class=""><img apple-inline="yes" id="ACA556CA-E37F-46F3-BBA1-9C4033A0CD18" class="" src="cid:EFFC272C-36AF-49D2-9DB7-2806169493F4@PK5001Z"></div><div class=""><br class=""></div><div class="">Our current project is a continuous TLUD that uses a 55 gallon drum as a feedstock hopper and a vertical 6” auger tube that can accept a cone for adjusting to a range of pyrolysis front diameters. These were initially conceived to be lab units, or building heat sources, but would work well for commercial cooking scenarios, where heat is needed without interruption for long periods of time.</div><div class=""><br class=""></div><div class="">Best,</div><div class=""><br class=""></div><div class="">Gordon West</div><div class=""><div class=""><div class="" style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div class=""><div class="">The Trollworks</div><div class="">503 N. “E” Street</div><div class="">Silver City, NM 88061</div><div class="">575-537-3689</div><div class=""><br class=""></div><div class=""><i class="">An entrepreneur sees problems as the seeds of opportunity.</i></div></div></div></div></div><div class=""><br class="Apple-interchange-newline">
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<br class=""><div><blockquote type="cite" class=""><div class="">On May 26, 2017, at 9:31 AM, Paul Anderson <<a href="mailto:psanders@ilstu.edu" class="">psanders@ilstu.edu</a>> wrote:</div><br class="Apple-interchange-newline"><div class="">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" class="">
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Karin (and all Stovers).<br class="">
<br class="">
Thank you for your comments and for your reserarch. <br class="">
<br class="">
I reply to only your final paragraph, in which I have empahsized one
sentence: <br class="">
<blockquote type="cite" class=""><p class="MsoNormal"><span lang="EN" class="">Finally, we do not
represent public health and promoting clean fuels when
possible is not a war against
solid fuels. It is my aspiration that one day everybody has
access to clean
fuels for all their needs, and this may require switching to
electricity,
biogas and other clean fuels (clean from the point of view of
health). <b class=""><u class=""><font size="+1" class="">It may
require the development of new technologies that may use
solid fuels. </font></u></b>Helping
poor people to have access to LPG or electricity with a
subsidy may be part of
the solution.</span></p>
</blockquote>
Maybe there will be newer technololgies, but <b class="">one
solid-biomass-fuel technology </b>for stoves already exists.
That is TLUD micro-gasifification. I encourage you (and any
readers) to become informed about TLUDs stoves. Best starting
place is my website: <a href="http://drtlud.com" class="">drtlud.com</a> (too much to try to summarize
here.)<br class="">
<br class="">
Much work still remains to be done, but what is reality should be
embraced and then the work can progress faster.<br class="">
<br class="">
Specific to Latin America (especially Mexico and Central America) is
the placement of TLUD firepower under the planchas for making
tortillas. More efforts would be appreciated. Please contact me
about that if interested.<br class="">
<br class="">
Paul<br class="">
<br class="">
<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>
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