<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Hi Paul and others<div class=""><br class=""></div><div class="">No harm done</div><div class=""><br class=""></div><div class="">My discussion was about this… Depending on the density of the fuel, the diameter of the burn chamber on a TLUD determines the area of fuel being burned.</div><div class=""><br class=""></div><div class="">In the case in point the wood pellets are more dense, but have less his space between them. Based on the density, I worked out that 150mm diameter of cut wattle wood of about 300mm in diameter (10 sticks) would fill a 150mm diameter chamber, and produce the same heat as wood pellets in a 100mm chamber.</div><div class=""><br class=""></div><div class="">As dried wood has a slightly lower MJ value per kg, we have to take this into account. Dried wood has a higher moisture value, thus when we weigh it we are weighing the water as well.</div><div class=""><br class=""></div><div class="">The depth of the TLUD determines how long the fuel will burn. Based on the burn rate we can determine how much heat will be generated from one burn, and how long this will burn for. We do this by dividing the kW heat into the kWh of fuel being burned. i.e. 7,5 kWh of wood burning at a rate of 5kW will burn for 90 minutes.</div><div class=""><br class=""></div><div class="">Why do this?</div><div class=""><br class=""></div><div class="">Well if we start with the fuel and work out its density, burn rate and weight, we can design a burn chamber that will provide the heat we need for the time we need it. We can work out what diameter the chamber needs to be and what depth we need it.</div><div class=""><br class=""></div><div class="">i.e. If we need 2 kW for 90 minutes, this will be 3 kWh. As stated by Ron, 1kg pellets = 18MJ = 5kWh. And the volatiles are about 70%, giving 3,5 kWh of effective heating. In the case of the FAABulous with 100mm chamber, we burn 600 grams in 1 hour as described below.</div><div class=""><br class=""></div><div class="">I would have saved a lot of time if there was some kind of a TLUD calculator published for the different fuel types. Hope this helps.</div><div class=""><br class=""></div><div class="">As Paul always tells me “START WITH THE FUEL”.</div><div class=""><br class=""></div><div class="">Dave</div><div class=""><a href="mailto:dave@ekasi.energy" class="">dave@ekasi.energy</a></div><div class="">Mobile: +27 82 891 8335</div><div class=""><br class=""></div><div class="">PS Please note that all of these discussions are based on a FA TLUD where the air is “pushed/forced”. I have found that even with a FA TLUD, there is an optimum fuel burn rate and that the fan needs to calibrated to the fuel (air flow rate) and not the other way around.</div><div class=""><br class=""></div><div class=""><br class=""><div class=""><div><blockquote type="cite" class=""><div class="">On 07 May 2017, at 20:51, Paul Anderson <<a href="mailto:psanders@ilstu.edu" class="">psanders@ilstu.edu</a>> wrote:</div><br class="Apple-interchange-newline"><div class="">
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Andrew, Ron and all,<br class="">
<br class="">
1. The mentioned Elsa stove is not by Dave Lello, but is by David
Young<br class=""><p class="">
<a href="mailto:dyoung@pobox.com" class="">dyoung@pobox.com</a> Urbana, IL
(217) 721-9981 <br class="">
</p><p class="">2, Dave Lello's stove is named FAABulous. FAAB stands for Fan
Assisted Appliance Base. It is not yet on the market, but is in
limited peoduction in South Africa for trials and testing etc.
Dave Lelo's company name is Ekasi Power. I am an advisor to Dave,
esecially aboutTLUD design and about getting the FAABulous Stove
into areas ourside of Southern Africa. He is subscribed to the
Stoves Listerv, is certainly seeing the messages, and he will send
comments whenever appropriate.<br class="">
</p><p class="">3. Andrew is correct, the message that Ron received was not
intended to be forwarded to the Stoves Lisrserv. My opinion is
"no serious harm done, but premature disclosures should be
avoided." So do not expect answers right away to all of Ron's
questions.<br class="">
</p><p class="">4. Anyone interested in communicaring with Dave should NOT do so
via the public Stove Listserv. His address is not a secret, but
I am not at liberty to give it to you here. If you write
privately to me at <a class="moz-txt-link-abbreviated" href="mailto:psanders@ilstu.edu">psanders@ilstu.edu</a> I will forward
everything to Dave. <br class="">
</p><p class="">5. Opinion: If you are interested in investing some serious
amounts of money into a primier woodgas / TLUD project anywhere in
the world, please let me know and I will put you in touch with
Dave. Yes, much is possible very soon, so now is the time for
contact.<br class="">
</p><p class="">Paul<br class="">
</p>
<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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