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<p class="MsoPlainText">Dear Dhan<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">The excess air and therefor the CO level can be managed by changing the thickness of the fuel deposited on perforated the chamber floor. Apparently they didn’t do that.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">It did not burn very well. The carbon combustion efficiency was only 88%, against >99% for a decent $200 HELE crossdraft coal stove which can also operate on some powder (30%?). The reason is pretty obvious: the O2 level never got
anywhere near low enough to burn the carbon properly. They also were interested in burning the fuel particles quickly which is not a requirement for good combustion.
<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">If they had deepened the fuel bed they could have dropped the O<sub>2</sub> from 15% to 7-8% and the CO level might have improved greatly. Another problem is the area into which the hot gases emerged after passing through the grate
was too large to maintain a good combustion temperature.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">From the conclusion: " Since the effective burnout time of particles increases with the number of layers, it is desirable to keep the bed thin for lower burnout times of charcoal particles."<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">The burnout time is not the problem, the high excess air level (250%) is. It never had a chance.
<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">In case people cannot access the paper, here is the drawing:<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText"><img width="453" height="360" style="width:4.7187in;height:3.75in" id="Picture_x0020_1" src="cid:image003.jpg@01D5D14F.AC79C260"><o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Regards<o:p></o:p></p>
<p class="MsoPlainText">Crispin<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
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<p class="MsoPlainText"><span lang="EN-US" style="mso-fareast-language:EN-CA">-----Original Message-----<br>
From: Stoves <stoves-bounces@lists.bioenergylists.org> On Behalf Of DHAN HURLEY<br>
Sent: Wednesday, January 22, 2020 15:57<br>
To: Discussion of biomass cooking stoves <stoves@lists.bioenergylists.org><br>
Subject: Re: [Stoves] _Biomass Charcoal Combustion Heater_PATENTS</span></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Hi,<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">How many of you have heard of this ( SEE WHAT I MEAN ABOUT PATENTS.... LOOK AT THE DATE 9 :
<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Development of Biomass Charcoal Combustion Heater for Household Utilization.<o:p></o:p></p>
<p class="MsoPlainText"> Masayuki Horio, Amit Suri*, Junji Asahara, Shinichi Sagawa, Chizuko Aida.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Cite this: Ind. Eng. Chem. Res. 2009, 48, 1, 361-372 Publication Date:August 27, 2008<o:p></o:p></p>
<p class="MsoPlainText"><a href="https://doi.org/10.1021/ie8006243"><span style="color:windowtext;text-decoration:none">https://doi.org/10.1021/ie8006243</span></a><o:p></o:p></p>
<p class="MsoPlainText">Copyright © 2008 American Chemical Society<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Abstract<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">In the present work a prototype powdered biomass charcoal fired heater with a heat output of 6 kW is designed and developed so that a new powdered charcoal market can be initiated to enhance greenhouse gas (GHG) reduction through massive
biomass utilization. The combustion heater was designed based on the concept of charcoal combustion in a thin bed cross-flow (TBCF) mode, where a very thin uniform bed of charcoal is fixed by air flow on the wall of a cylindrical chamber with an air-penetrable
wall. The distinct advantage of using such a thin bed cross-flow is low fuel inventory and good air−fuel contact, resulting in fast startup/shutdown and low CO emissions in the exhaust gases.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Dhan<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">DIASPORA COMMUNITY.... My PROFILE PAGE :-<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">IRISH, MUSICIAN, POET, PHYSICS, “FREE-ENERGY”, LINUX PROFI, ALTERNATIVE SYSTEMS, GEOPOLYMERS, ALTERNATIVE HEALTH-FARMING-MATERIALS,ORMUS, MYSTIC, etc.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText"><a href="https://despora.de/people/6d39a7e04a610132027a42cdb1fcde73"><span style="color:windowtext;text-decoration:none">https://despora.de/people/6d39a7e04a610132027a42cdb1fcde73</span></a><o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
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<p class="MsoPlainText"><o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">_______________________________________________<o:p></o:p></p>
<p class="MsoPlainText">Stoves mailing list<o:p></o:p></p>
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<p class="MsoPlainText">for more Biomass Cooking Stoves, News and Information see our web site:<o:p></o:p></p>
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