<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Alex,</div><div id="AppleMailSignature"><br></div><div id="AppleMailSignature">It may be a matter of scale. In a small tin can TLUD, the rate of gas production low at start rapidly in crease, is reasonably stable for a bit and then rapidly decreases. Easily demonstrated.</div><div id="AppleMailSignature"><br></div><div id="AppleMailSignature">Jock<br><br><div><div><span style="background-color: rgba(255, 255, 255, 0);">Jock Gill</span></div><div><a dir="ltr" href="x-apple-data-detectors://0" x-apple-data-detectors="true" x-apple-data-detectors-type="address" x-apple-data-detectors-result="0" style="background-color: rgba(255, 255, 255, 0);"><font color="#000000">P. O. Box 3</font></a></div><div><a dir="ltr" href="x-apple-data-detectors://0" x-apple-data-detectors="true" x-apple-data-detectors-type="address" x-apple-data-detectors-result="0" style="background-color: rgba(255, 255, 255, 0);"><font color="#000000">Peacham, VT 05862</font></a></div></div><div><span style="background-color: rgba(255, 255, 255, 0);"><br></span></div><div>Cell: (617) 449-8111</div><div><span style="background-color: rgba(255, 255, 255, 0);"><br></span></div><span style="background-color: rgba(255, 255, 255, 0);">Extract CO2 from the atmosphere!</span></div><div><br>On Jun 16, 2016, at 8:36 AM, alex english <<a href="mailto:aenglish444@gmail.com">aenglish444@gmail.com</a>> wrote:<br><br></div><blockquote type="cite"><div><p dir="ltr">Wow. After all the time I spent with TLUDs, I would have described it as the opposite. The most linear self regulating simple combustion system. <br>
Vive la difference!<br>
Alex</p>
<div class="gmail_quote">On Jun 16, 2016 8:12 AM, "Jock Gill" <<a href="mailto:jock@jockgill.com">jock@jockgill.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto"><div>Basically a TLUD is a very non linear system. It is extremely hard to maintain an ideal fuel to air ratio. The hotter it gets, the more gas it produces, the higher the flames, the hotter it gets. It is hard to create the degree of turbulence for proper mixing. It is hard to maintain useful residence times in the combustion zone. It is a nasty feedback loop that is difficult to work with.</div><div><br></div><div>Se my work with flame retention played and flame deflectors.<br><br><div><div><span style="background-color:rgba(255,255,255,0)">Jock Gill</span></div><div><a dir="ltr" style="background-color:rgba(255,255,255,0)"><font color="#000000">P. O. Box 3</font></a></div><div><a dir="ltr" style="background-color:rgba(255,255,255,0)"><font color="#000000">Peacham, VT 05862</font></a></div></div><div><span style="background-color:rgba(255,255,255,0)"><br></span></div><div>Cell: <a href="tel:%28617%29%20449-8111" value="+16174498111" target="_blank">(617) 449-8111</a></div><div><span style="background-color:rgba(255,255,255,0)"><br></span></div><span style="background-color:rgba(255,255,255,0)">Extract CO2 from the atmosphere!</span></div><div><br>On Jun 15, 2016, at 5:06 AM, Mangolazi <<a href="mailto:mangolazi@yahoo.com" target="_blank">mangolazi@yahoo.com</a>> wrote:<br><br></div><blockquote type="cite"><div><span>I've always wondered what causes that towering inferno to occur. I've had this happen a few times with a tiny tin can stove and with a big paint can biochar burner. I try to avoid it so my pots don't get damaged. </span><br><span></span><br><span>Is it too much primary air? Lots of wood gas from certain fuels? Fast gas flow from a tall chimney? </span><br><span></span><br><span>Looking at a bunch of papers on TLUDs, it seems there's a trade off between temperature and burn time. You can throttle primary air to get a long burn time but temperatures may not get high enough to burn cleanly, whereas a more complete and hotter burn means the fuel is turned to char much faster. </span><br><span></span><br><span>On June 15, 2016 6:23:02 AM GMT+08:00, <a href="mailto:neiltm@uwclub.net" target="_blank">neiltm@uwclub.net</a> wrote:</span><br><blockquote type="cite"><span>On 14 Jun 2016 at 16:17, Mangolazi wrote:</span><br></blockquote><blockquote type="cite"><span></span><br></blockquote><blockquote type="cite"><blockquote type="cite"><span>Hi Neil, thanks for the recommendations. I think I'll get one of</span><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><span>those cheap Chinese stoves to see what they can do. Most of them</span><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><span>look the same so I assume they're all from the same factory. </span><br></blockquote></blockquote><blockquote type="cite"><span></span><br></blockquote><blockquote type="cite"><span>They do seem to be all the same. The main difference between them is</span><br></blockquote><blockquote type="cite"><span>in </span><br></blockquote><blockquote type="cite"><span>which type of pot support/concentrator top you choose. There are the </span><br></blockquote><blockquote type="cite"><span>fold out sort, with a gap between top of concentrator and pot of 2cm,</span><br></blockquote><blockquote type="cite"><span>and</span><br></blockquote><blockquote type="cite"><span>the fixed higher rise top (4.5cm) with open side that permits easier</span><br></blockquote><blockquote type="cite"><span>fuel</span><br></blockquote><blockquote type="cite"><span>feeding without removing the pot. I have both, and now prefer the</span><br></blockquote><blockquote type="cite"><span>latter</span><br></blockquote><blockquote type="cite"><span>as the increased height between secondary air holes and pot makes for a</span><br></blockquote><blockquote type="cite"><span></span><br></blockquote><blockquote type="cite"><span>slightly cleaner burn, and interferes less with the draught. It has </span><br></blockquote><blockquote type="cite"><span>closer support points though, although I have yet to suffer instability</span><br></blockquote><blockquote type="cite"><span></span><br></blockquote><blockquote type="cite"><span>from that. All the parts between the two stoves, bought years apart,</span><br></blockquote><blockquote type="cite"><span>are</span><br></blockquote><blockquote type="cite"><span>interchangeable.</span><br></blockquote><blockquote type="cite"><span></span><br></blockquote><blockquote type="cite"><blockquote type="cite"><span>They're</span><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><span>also rather squat - more power, less run time? </span><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><span></span><br></blockquote></blockquote><blockquote type="cite"><span></span><br></blockquote><blockquote type="cite"><span>They are squat, but run time really depends on the fuel. It is about</span><br></blockquote><blockquote type="cite"><span>10 </span><br></blockquote><blockquote type="cite"><span>mins of towering inferno run as a TLUD with dry wood, but double that</span><br></blockquote><blockquote type="cite"><span>and</span><br></blockquote><blockquote type="cite"><span>up to half an hour with moister/denser/larger fuel, and I've read an</span><br></blockquote></div></blockquote></div><br>_______________________________________________<br>
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