<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div>The pictures below illustrate a simple setup for teachers and students to experiment with TLUDs enhanced with variable speed fans.</div><div><br></div><div><br></div><div><br></div><div><img name="image.jpeg" id="339f7856-d426-497a-8b8e-a8cad45c2503" height="640" width="480" apple-width="yes" apple-height="yes" src="cid:26164F6E-510E-487A-AE5C-4E580047B2F2"></div><div><br></div><div>A variable speed fan is mounted in a section of PVC pipe. This assembly sits on top of</div><div>angle brackets to allow air to be pulled into the pipe section.</div><div><br></div><div>The grate above the fan assembly serves as the base for the TLUD.</div><div><br></div><div>The TLUD pictured is made from a standard soup can. The design uses a gap for secondary air</div><div>and three washers as "deflectors" This is as an alternative to a concentrator ring.</div><div>My experience is that deflectors work better are promoting turbulence in the fuel/air mixture.</div><div><br></div><div><br></div><div><img name="image.jpeg" id="86487b4a-5079-46d2-8daf-5634d29481ff" height="640" width="480" apple-width="yes" apple-height="yes" src="cid:5641F897-4E15-4376-B833-D2D700910D0F"></div><div><br></div><div>Here we see the the draft enhancing can placed on top of the TLUD reactor can.</div><div>The draft can is simply another soup can with both top and bottom removed.</div><div>It is a "straight pipe".</div><div><br></div><div>This design has been documented in other posts. It is key that the primary air supply</div><div>system be tuned to the fuel type. I find the fewest and smallest holes in the bottom of</div><div> the TLUD reactor that will allow complete pyrolysis of the feedstock makes a good design goal.</div><div><br></div><div>This has the added advantage that hot bits of charcoal are very unlikely to drop thru and damage the fan.</div><div>Anything that falls thru will be so small and light that the fan will blow it out of harms way.</div><div><br></div><div>This also allows the fan to be a permanent installation that the user does not have to worry about.</div><div><br></div><div><br></div><img name="image.jpeg" id="58cd25e8-3c93-418c-a9e3-d2431802f9cd" height="640" width="480" apple-width="yes" apple-height="yes" src="cid:02CFBD96-216D-404F-9516-314FAE394F41"><br>Plenum can made from 3 pound Costco coffee can.<div><br></div><div>Test in process. No smoke. Blended fuel: pellets, rice hulls, coffee chaff <br><br>Above we see a can that was tested as a concentrator repurposed. It is now inverted.<div>It surrounds the TLUD and does several things.</div><div><br></div><div>1. It captures air from the fan and forces it into the secondary air gap;</div><div><br></div><div>2. It captures some of the heat from the TLUD that is lost laterally.</div><div> This allows the secondary air to be pre-heated;</div><div><br></div><div>3. It protects the secondary air gap from external breezes;</div><div><br></div><div>4. Offers a degree of safety for the enclosed TLUD and draft enhancer.</div><div><br></div><div>Ideally, the top of this outer can would be about flush with the top of the draft can.</div><div>This would support a grate for cooking small samples.</div><div><br></div><div><br></div><div><div><br></div><div><img name="image.jpeg" id="6e76a1ac-e787-4d24-b9b3-763a96f9796a" height="480" width="507" apple-width="yes" apple-height="yes" src="cid:1F1CE59C-8BF8-4F08-8CE2-6887E1D3A87D"><br><br>View looking into the system during operation.<br><br><img name="image.jpeg" id="879caa88-a0a3-4f2e-a35c-f1e04b04d098" height="480" width="598" apple-width="yes" apple-height="yes" src="cid:9064C27A-610D-4D0A-9E1C-2F5B74D94577"><br>Pyrolytic carbon harvested from blended feedstock. Low ash is evident.</div><div>I start my conversations by telling people they are looking CO2 that used to be in the atmosphere.</div><div>i find this to be a very effective "hook" that gets them to start asking questions.</div><div><br><br><br><br><img name="image.jpeg" id="9ff82fda-dca0-4df3-b432-ad6b73844728" height="516" width="480" apple-width="yes" apple-height="yes" src="cid:6B205A56-35A6-4FED-B586-57DE44B88010"></div><div>Another top down view of system in operation<br></div><div><br></div><div><br></div><div><img name="image.jpeg" id="c5354771-01a0-41e6-8d89-c776f3b6b97c" height="640" width="480" apple-width="yes" apple-height="yes" src="cid:46DE2856-2F47-4CD5-86EC-C8E26BEFEB83"></div><div><br></div><div>Plenum can. This VERY easy to make.</div><div><br></div><div>Locate the center. Locate the five points of the pentagon - or hexagon.</div><div><br></div><div>Drill holes in the center and at the points of the pentagon. The center hole should</div><div>be as large as possible to make it easy to get the snips in.</div><div>Use tin snips to cut from the center to the holes at the corners of the polygon.</div><div>Bend the flaps back int the can and flatten them out. Done.</div><div><br></div><div>Make sure the resulting aperture is not too loose or too tight a fit around the</div><div>draft can. The plenum can has to be easy to add to the system and to remove.</div><div><br></div><div>Glad to answer any questions.</div><div><br></div><div>Regards,</div><div><br></div><div>Jock</div><div><br></div></div></div><div>
Jock Gill<br>P.O. Box 3<br>Peacham, VT 05862<br><br>+1 (802) 503-1258<br><br>
</div><div><br class="webkit-block-placeholder"></div><div>Extract CO2 from the atmosphere!</div><div><br></div>
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