<div dir="ltr">Jonathan,<div><br></div><div>Great pictures, thanks for the narrative.<br><div><br></div><div style>In regards to "<span style="font-family:arial,sans-serif"><i>How do we get around this limiting factor in our educational system</i><span style="font-size:12.499999046325684px">?" </span></span><font face="arial, sans-serif">I suggest that one finds an interested science teacher at your local high school. I worked with one this past semester who had me come in and do a one hour "class" on gasification, micro-gasifiers, biochar, etc with an emphasis on appropriate stoves to address the 500 million daily three stone fires. This was a class of approximately 25 students from the 11th and 12th grades. A couple of days later it was followed up by an afternoon lab where they teamed up to make 8 micro-gasifers that we burned and cooked lunch on. He had the students collect the materials necessary and supplemented them with cans he was seen taking from the trash containers on campus.</font></div>
<div style><font face="arial, sans-serif"><br></font></div><div style><font face="arial, sans-serif">The level of interest and questions impressed me. I was asked "if the biochar could be used to filter water when they go camping?" I had an Anderson Champion stove with me and another student asked "Do you know what the working conditions are for the people manufacturing them in India?" The teacher tied this all in to his class because they were discussing resources, agriculture, etc. </font></div>
<div style><font face="arial, sans-serif"><br></font></div><div style><font face="arial, sans-serif">A couple of days after the class I asked the him how were the 2 days received? His reply was that he had to spend the entire next class talking about biochar, the developing world and potential uses in the USA. He concluded by saying that some of the students took their stoves home and cooked part of dinner on them. So that by these results it was an enormous success.</font></div>
<div style><font face="arial, sans-serif"><br></font></div><div style><font face="arial, sans-serif">Find a teacher. Many are looking at ways to stimulate their students. Show me any student that doesn't want to play with fire and build something as a team of 2 or 3 working together. By the way the class was composed of an equal number of boys and girls. I had fun. They had fun and that to me is the key to success.</font></div>
<div style><font face="arial, sans-serif"><br></font></div><div style><font face="arial, sans-serif">Francesco</font></div><div style><font face="arial, sans-serif"><br></font></div><div style><font face="arial, sans-serif"><br>
</font></div></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Thu, May 23, 2013 at 7:09 AM, Jonathan P Gill <span dir="ltr"><<a href="mailto:jg45@me.com" target="_blank">jg45@me.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word"><div>Stovers,</div><div><br></div><div>I have had success with natural draft TLUDs with secondary slots and with TLUDs with secondary air from three three triangular cutouts that, bent into the TLUD, form a vortex generator. I also find that a fan powered TLUD with a solid disk "burner" that allows the syngas to escape via the gap between the disk and the sides of the TLUD also works. Next to try is a disk that seals the reactor but has holes around the circumference to allow the syngas to escape -- ala Prof Belinio & P. Olivier.</div>
<div><br></div><div>Clearly there are many solutions to TLUD design. Natural draft secondary air via holes, slots, cut outs, or fan powered forced draft secondary. Or use concentrator rings or deflectors? Vortex generators? etc. All solutions, of course, will have to be tuned for local conditions and fuel types. One size does not fit all.</div>
<div><br></div><div>Photos below are of a natural draft TLUD with a secondary air slot and three deflectors. No vortex generator. The reactor can is made from a 4 lbs tuna fish can.</div><div><br></div><div>Please remember that iCans are designed to be very affordable teaching tools with which to introduce students to pyrolysis, carbon harvesting, carbon negative energy, soil health, etc.</div>
<div>The sad thing is that the word "pyrolysis" is not covered by any of the tests that most teachers are now forced to teach to. These tests, consequently, stymie out side the box thinking and the introduction of new ideas. They merely re-inforce the current given "wisdom" and the status quo. How do we get around this limiting factor in our educational system?</div>
<div><br></div><div><br></div><img height="480" width="501" src="cid:C26CA0D5-1718-48CA-B7C0-7EEACEB09AC7"><div>View into the vigorous flame which is mostly below the deflectors, mounted on two inch angle braces. Very little flame shoots up and out the top.<br>
<div style="margin:0px;font-style:normal;font-variant:normal;font-weight:normal;font-size:12px;line-height:normal;font-family:Helvetica;min-height:14px"><br></div><div style="margin:0px;font-style:normal;font-variant:normal;font-weight:normal;font-size:12px;line-height:normal;font-family:Helvetica;min-height:14px">
<br><img height="567" width="480" src="cid:B256DDFD-92CC-48F8-AE80-D40F7EC10962"><br></div><div style="margin:0px;font-variant:normal;line-height:normal;min-height:14px"><font face="Helvetica">Side view of the above with a bit of flame escaping. The outer unit shields the secondary slot from breezes and wind gusts. </font></div>
<div style="margin:0px;font-variant:normal;line-height:normal;min-height:14px"><font face="Helvetica">This design is very resistant to being blown out even by strong gusts.</font></div><div style="margin:0px;font-variant:normal;line-height:normal;min-height:14px">
<font face="Helvetica"><br></font><br></div><div style="margin:0px;font-style:normal;font-variant:normal;font-weight:normal;font-size:12px;line-height:normal;font-family:Helvetica;min-height:14px"><br><img height="640" width="480" src="cid:5CE74DB3-23C6-4544-92A1-81F6D755EB5C"><br>
</div><div style="margin:0px;font-variant:normal;line-height:normal;min-height:14px"><font face="Helvetica">The interior "guts" of the small natural draft iCan TLUD with secondary air slot topped by a draft enhancer.</font></div>
<div style="margin:0px;font-variant:normal;line-height:normal;min-height:14px"><font face="Helvetica"><br></font></div><div style="margin:0px;font-variant:normal;line-height:normal;min-height:14px"><span style="font-family:Helvetica">The tuna fish can sets up on three small angle brackets attached to its bottom. </span></div>
<div style="margin:0px;font-variant:normal;line-height:normal;min-height:14px"><span style="font-family:Helvetica">The top piece is a standard 6" to 4" reducer readily available in stove shops.</span></div><div style="margin:0px;font-style:normal;font-variant:normal;font-weight:normal;font-size:12px;line-height:normal;font-family:Helvetica;min-height:14px">
<br></div><div style="margin:0px;font-style:normal;font-variant:normal;font-weight:normal;font-size:12px;line-height:normal;font-family:Helvetica;min-height:14px"><br></div><div style="margin:0px;font-style:normal;font-variant:normal;font-weight:normal;font-size:12px;line-height:normal;font-family:Helvetica;min-height:14px">
<img height="480" width="640" src="cid:5CE4D77F-2BB8-4119-BE09-B96F24E524BA"></div><div style="margin:0px;font-variant:normal;line-height:normal;min-height:14px"><font face="Helvetica">Flame floating on wood pellet syngas. </font></div>
<div style="margin:0px;font-variant:normal;line-height:normal;min-height:14px"><font face="Helvetica">The height of the gap can easily be adjusted by raising or lowering the three angle brackets which are both attachment points for the deflectors and the base for the draft enhancer.</font></div>
<div style="margin:0px;font-style:normal;font-variant:normal;font-weight:normal;font-size:12px;line-height:normal;font-family:Helvetica;min-height:14px"><br></div><div style="margin:0px;font-style:normal;font-variant:normal;font-weight:normal;font-size:12px;line-height:normal;font-family:Helvetica;min-height:14px">
<br><img height="640" width="480" src="cid:719AB895-9589-46F8-8B79-DF3E33DC6FD7"><br></div><div style="margin:0px;font-style:normal;font-variant:normal;font-weight:normal;font-size:12px;line-height:normal;font-family:Helvetica;min-height:14px">
<br></div><div style="margin:0px;font-variant:normal;line-height:normal;min-height:14px"><font face="Helvetica">Side view of the small natural draft iCan TLUD in its windshield.</font></div><div style="margin:0px;font-variant:normal;line-height:normal;min-height:14px">
<font face="Helvetica"><br></font></div><div style="margin:0px;font-variant:normal;line-height:normal;min-height:14px"><font face="Helvetica">I have also posted on YouTube a short video of the flames in a natural draft iCan with three secondary air ports and a vortex generator - see below.</font></div>
<div style="margin:0px;font-variant:normal;line-height:normal;min-height:14px"><font face="Helvetica">In the video, you will be able to hear the turbulence in the burning gases.</font></div><div style="margin:0px;font-variant:normal;line-height:normal;min-height:14px">
<font face="Helvetica"><br></font></div><div style="margin:0px;font-variant:normal;line-height:normal;min-height:14px"><a href="https://www.youtube.com/watch?v=0taQcvbvVWM&feature=youtu.be" target="_blank">https://www.youtube.com/watch?v=0taQcvbvVWM&feature=youtu.be</a></div>
<div style="margin:0px;font-variant:normal;line-height:normal;min-height:14px"><font face="Helvetica"><br></font></div><div style="margin:0px;font-variant:normal;line-height:normal;min-height:14px"><img height="640" width="480" src="cid:CA15939F-CF75-4709-A79D-0A48E0A51C69"></div>
<div style="margin:0px;font-variant:normal;line-height:normal;min-height:14px"><br></div><div style="margin:0px;font-variant:normal;line-height:normal;min-height:14px">Note: All the photos and video are made with an iPhone. </div>
<div style="margin:0px;font-style:normal;font-variant:normal;font-weight:normal;font-size:12px;line-height:normal;font-family:Helvetica;min-height:14px"><br></div> </div></div><br>_______________________________________________<br>
Stoves mailing list<br>
<br>
to Send a Message to the list, use the email address<br>
<a href="mailto:stoves@lists.bioenergylists.org">stoves@lists.bioenergylists.org</a><br>
<br>
to UNSUBSCRIBE or Change your List Settings use the web page<br>
<a href="http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org" target="_blank">http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org</a><br>
<br>
for more Biomass Cooking Stoves, News and Information see our web site:<br>
<a href="http://stoves.bioenergylists.org/" target="_blank">http://stoves.bioenergylists.org/</a><br>
<br>
<br></blockquote></div><br></div>