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<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Dear Andrew<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Hoe about placing a short chimney inside the stove? Suspend it so the bottom just touches the top of the fuel to start, and remains “in the air” as the fuel burns down. I suspect it will pull in
the upward-bound gases and improve the quality of the downdrafting primary (I love preheated downdrafting primary air).
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">It might burn out the corner fuel a bit better/more completely.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">I also suspect it will burn damp fuel better than any other method, largely because of the preheated primary air. Adding moister fuel (maybe not at the very top so it ignites well) should reduce
the char % yield but still burn very cleanly.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">The temperature here is dropping this week from a sunny 3</span><span style="font-family:"Tahoma",sans-serif;mso-fareast-language:EN-US">°</span><span style="mso-fareast-language:EN-US">C today.
We are putting a damp 12” log into the fireplace each night. I worked out how to burn them cleanly! Always something new.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Regards<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Crispin<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> Stoves <stoves-bounces@lists.bioenergylists.org>
<b>On Behalf Of </b>A J<br>
<b>Sent:</b> Monday, March 07, 2022 20:21<br>
<b>To:</b> stoves@lists.bioenergylists.org<br>
<b>Subject:</b> Re: [Stoves] Stoves Digest, Vol 139, Issue 6<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">Crispin,<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">You are correct in your assement of the stove. The stove in the current format will char 95%+ of the wood, leaving undercharred wood on the outside edges due to a lack of draft at the end of the burn. <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">The stove lights easy and will start out strong with just enough secondary air and finish with a weak flame with too much air. It seemed comparable to a basic TLUD.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">The pellets will settle into a funnel shape as they reduce. I placed a 2D donut shaped piece of sheet metal under the soil layer in the previous video.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Andrew, <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Crispin did a good job explaining but here are a few more videos. My drawing skills are awful and I can't get to a paint program this week. I will get an updated drawing next week unless Alex tells me no. <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">This is how it starts up.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><a href="https://youtu.be/F9OrriVw3Zk">https://youtu.be/F9OrriVw3Zk</a><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">This is considered started.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><a href="https://youtu.be/okVlI1Zv9HI">https://youtu.be/okVlI1Zv9HI</a><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">This is how it finished<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><a href="https://youtu.be/JmbBuBIPlEs">https://youtu.be/JmbBuBIPlEs</a><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">This is what the inside looks like <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><a href="https://youtu.be/6cuVET6uCHw">https://youtu.be/6cuVET6uCHw</a><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Alex,<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">;) I don't have a clue as to what the right path to take is for getting this to the world.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"> The simplest version of this stove is a hole in the ground and a cylindrical screen that could be made of sticks. Oh, and some clay to seal the top and for making terra preta. <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">The well designed version is OMG<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">You are the man, <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Aaron Wingle<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Pyromaniac<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Paul, <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">I'm still going to get back to you on the graphene post. Your response was greatly appreciated.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">The supply chain failed and I could not get my stove parts I needed to finish recreating the molten stuff so I put a lot of focus into designing a cheaper stove with fewer parts that also lasts longer.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Thank you for all the years of guidance,<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Aaron<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div class="MsoNormal" align="center" style="text-align:center">
<hr size="2" width="98%" align="center">
</div>
<div id="divRplyFwdMsg">
<p class="MsoNormal"><b><span style="color:black">From:</span></b><span style="color:black"> Stoves <<a href="mailto:stoves-bounces@lists.bioenergylists.org">stoves-bounces@lists.bioenergylists.org</a>> on behalf of
<a href="mailto:stoves-request@lists.bioenergylists.org">stoves-request@lists.bioenergylists.org</a> <<a href="mailto:stoves-request@lists.bioenergylists.org">stoves-request@lists.bioenergylists.org</a>><br>
<b>Sent:</b> Monday, March 7, 2022 6:00 PM<br>
<b>To:</b> <a href="mailto:stoves@lists.bioenergylists.org">stoves@lists.bioenergylists.org</a> <<a href="mailto:stoves@lists.bioenergylists.org">stoves@lists.bioenergylists.org</a>><br>
<b>Subject:</b> Stoves Digest, Vol 139, Issue 6</span> <o:p></o:p></p>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
</div>
<div>
<div>
<p class="MsoNormal">Send Stoves mailing list submissions to<br>
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<br>
Today's Topics:<br>
<br>
1. Re: This is not a TLUD stove. (A J)<br>
2. Re: This is not a TLUD stove. (Crispin Pemberton-Pigott)<br>
3. Re: This is not a TLUD stove. (<a href="mailto:ajheggie@gmail.com">ajheggie@gmail.com</a>)<br>
4. Re: This is not a TLUD stove. (alex english)<br>
<br>
<br>
----------------------------------------------------------------------<br>
<br>
Message: 1<br>
Date: Sun, 6 Mar 2022 19:21:14 +0000<br>
From: A J <<a href="mailto:awingle@hotmail.com">awingle@hotmail.com</a>><br>
To: "<a href="mailto:stoves@lists.bioenergylists.org">stoves@lists.bioenergylists.org</a>"<br>
<<a href="mailto:stoves@lists.bioenergylists.org">stoves@lists.bioenergylists.org</a>><br>
Subject: Re: [Stoves] This is not a TLUD stove.<br>
Message-ID:<br>
<<a href="mailto:DM6PR06MB65082C7863AE8CF14FD020BEB0079@DM6PR06MB6508.namprd06.prod.outlook.com">DM6PR06MB65082C7863AE8CF14FD020BEB0079@DM6PR06MB6508.namprd06.prod.outlook.com</a>><br>
<br>
Content-Type: text/plain; charset="iso-8859-1"<br>
<br>
I've been working with a new stove design that is showing a lot of promise to char a load of wood.<br>
<br>
The stove has no primary air holes in the Fuel chamber.<br>
<br>
A 3 1/2" metal screen cylinder is placed in the center of the fuel chamber (16 quart bucket with a lid with a 4" exhaust hole) Wood Pellets are added around the screen and filled to the top, just below the air inlets. The screen leaves an open hole in the
fuel chamber from the top to the bottom.<br>
<br>
I then added soil on top of the fuel Pellets. I packed it about an inch deep next to the screen and kept adding the soil over the top of the pellets, but left a 1" ring of exposed pellets next to the fuel chamber walls. This "ring" supplies the primary air.<br>
<br>
I add 1/4 cup of gasoline into the bottom of the screen, then ignite the gas.<br>
<br>
The flame starts the pellets burning at the bottom. As the oxygen becomes depleted the flame works itself up the screen to the top of the fuel bed. Once the flame reaches the top it only wood gas is burning. The secondary air is supplied through the two
vortex vents on the sides of the fuel chamber. The soil on top prevents the flames from burning the top of the fuel load. The lid is now installed.<br>
<br>
I'm not 100% certain how exactly the "flame front" works in this stove, but it is somehow not burning from the top down, but from the inside out. Most likely bottom up and inside out at the same time.<br>
<br>
Near the end of the burn coals will appear on the outer ring of exposed pellets. They have not started on fire during that process, yet. I expect they could and that would be beneficial.<br>
<br>
So far, I've been able to char 95% of the wood and the total fuel volume reduces about 55%. The undercharred pieces remain at the outer edges.<br>
<br>
This video is from the end of the burn. You can see glowing embers appearing on the outer ring.<br>
<br>
<a href="https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fyoutu.be%2F3xSp3RfIzxU&data=04%7C01%7C%7Cf25327541fae43b2215a08da00b3d51f%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637823069642305503%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=GligQckMbVMwwCTDYTRPSTHMmglixjQwTeXngp2sh3Q%3D&reserved=0">https://youtu.be/3xSp3RfIzxU</a><br>
<br>
I believe this design has a ton of potential to be very cheap and easy to make. It's not perfect yet, but it is worth taking a look at.<br>
<br>
<br>
<br>
<br>
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<br>
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<br>
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Message: 2<br>
Date: Sun, 6 Mar 2022 20:14:14 +0000<br>
From: Crispin Pemberton-Pigott <<a href="mailto:crispinpigott@outlook.com">crispinpigott@outlook.com</a>><br>
To: Discussion of biomass cooking stoves<br>
<<a href="mailto:stoves@lists.bioenergylists.org">stoves@lists.bioenergylists.org</a>><br>
Subject: Re: [Stoves] This is not a TLUD stove.<br>
Message-ID:<br>
<<a href="mailto:DM5PR18MB213664D601C6AC67B7402CF8B1079@DM5PR18MB2136.namprd18.prod.outlook.com">DM5PR18MB213664D601C6AC67B7402CF8B1079@DM5PR18MB2136.namprd18.prod.outlook.com</a>><br>
<br>
Content-Type: text/plain; charset="us-ascii"<br>
<br>
Dear Andrew<br>
<br>
I think it is pulling air down the outside and drafting gas up the centre. The pyrolysation of the inner fuel is fed by air coming through the fuel. The draft is supplied by the low density flame.<br>
<br>
It sounds good. Does it burn to completion? How does the "activity" change as the fuel disappears?<br>
<br>
Interesting work.<br>
Crispin<br>
<br>
<br>
<br>
<br>
From: Stoves <<a href="mailto:stoves-bounces@lists.bioenergylists.org">stoves-bounces@lists.bioenergylists.org</a>> On Behalf Of A J<br>
Sent: Sunday, March 06, 2022 12:21<br>
To: <a href="mailto:stoves@lists.bioenergylists.org">stoves@lists.bioenergylists.org</a><br>
Subject: Re: [Stoves] This is not a TLUD stove.<br>
<br>
I've been working with a new stove design that is showing a lot of promise to char a load of wood.<br>
<br>
The stove has no primary air holes in the Fuel chamber.<br>
<br>
A 3 1/2" metal screen cylinder is placed in the center of the fuel chamber (16 quart bucket with a lid with a 4" exhaust hole) Wood Pellets are added around the screen and filled to the top, just below the air inlets. The screen leaves an open hole in the
fuel chamber from the top to the bottom.<br>
<br>
I then added soil on top of the fuel Pellets. I packed it about an inch deep next to the screen and kept adding the soil over the top of the pellets, but left a 1" ring of exposed pellets next to the fuel chamber walls. This "ring" supplies the primary air.<br>
<br>
I add 1/4 cup of gasoline into the bottom of the screen, then ignite the gas.<br>
<br>
The flame starts the pellets burning at the bottom. As the oxygen becomes depleted the flame works itself up the screen to the top of the fuel bed. Once the flame reaches the top it only wood gas is burning. The secondary air is supplied through the two
vortex vents on the sides of the fuel chamber. The soil on top prevents the flames from burning the top of the fuel load. The lid is now installed.<br>
<br>
I'm not 100% certain how exactly the "flame front" works in this stove, but it is somehow not burning from the top down, but from the inside out. Most likely bottom up and inside out at the same time.<br>
<br>
Near the end of the burn coals will appear on the outer ring of exposed pellets. They have not started on fire during that process, yet. I expect they could and that would be beneficial.<br>
<br>
So far, I've been able to char 95% of the wood and the total fuel volume reduces about 55%. The undercharred pieces remain at the outer edges.<br>
<br>
This video is from the end of the burn. You can see glowing embers appearing on the outer ring.<br>
<br>
<a href="https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fyoutu.be%2F3xSp3RfIzxU&data=04%7C01%7C%7Cf25327541fae43b2215a08da00b3d51f%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637823069642305503%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=GligQckMbVMwwCTDYTRPSTHMmglixjQwTeXngp2sh3Q%3D&reserved=0">https://youtu.be/3xSp3RfIzxU</a><br>
<br>
I believe this design has a ton of potential to be very cheap and easy to make. It's not perfect yet, but it is worth taking a look at.<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
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Message: 3<br>
Date: Mon, 7 Mar 2022 13:07:36 +0000<br>
From: <a href="mailto:ajheggie@gmail.com">ajheggie@gmail.com</a><br>
To: Discussion of biomass cooking stoves<br>
<<a href="mailto:stoves@lists.bioenergylists.org">stoves@lists.bioenergylists.org</a>><br>
Subject: Re: [Stoves] This is not a TLUD stove.<br>
Message-ID:<br>
<<a href="mailto:CAPSaZeZdSMPsH-s5Lk-vaVpxgdRkzLD0u57oFUjbAwFTXBTHgw@mail.gmail.com">CAPSaZeZdSMPsH-s5Lk-vaVpxgdRkzLD0u57oFUjbAwFTXBTHgw@mail.gmail.com</a>><br>
Content-Type: text/plain; charset="UTF-8"<br>
<br>
On Mon, 7 Mar 2022 at 02:50, A J <<a href="mailto:awingle@hotmail.com">awingle@hotmail.com</a>> wrote:<br>
><br>
> I've been working with a new stove design that is showing a lot of promise to char a load of wood.<br>
><br>
> The stove has no primary air holes in the Fuel chamber.<br>
><br>
> A 3 1/2" metal screen cylinder is placed in the center of the fuel chamber (16 quart bucket with a lid with a 4" exhaust hole) Wood Pellets are added around the screen and filled to the top, just below the air inlets. The screen leaves an open hole in
the fuel chamber from the top to the bottom.<br>
><br>
> I then added soil on top of the fuel Pellets. I packed it about an inch deep next to the screen and kept adding the soil over the top of the pellets, but left a 1" ring of exposed pellets next to the fuel chamber walls. This "ring" supplies the primary
air.<br>
<br>
A picture is worth a thousand words as they say Aaron, any chance of a<br>
sketch of the layout for those of us who have trouble visualising your<br>
layout?<br>
<br>
Andrew<br>
<br>
<br>
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Message: 4<br>
Date: Mon, 7 Mar 2022 08:24:29 -0500<br>
From: alex english <<a href="mailto:aenglish444@gmail.com">aenglish444@gmail.com</a>><br>
To: <a href="mailto:ajheggie@gmail.com">ajheggie@gmail.com</a>, Discussion of biomass cooking stoves<br>
<<a href="mailto:stoves@lists.bioenergylists.org">stoves@lists.bioenergylists.org</a>><br>
Subject: Re: [Stoves] This is not a TLUD stove.<br>
Message-ID:<br>
<<a href="mailto:CA+6hwOp9L8n3G0fQaG=87YLo3VsAnkZBv7CWbFa24Gij9sanSg@mail.gmail.com">CA+6hwOp9L8n3G0fQaG=87YLo3VsAnkZBv7CWbFa24Gij9sanSg@mail.gmail.com</a>><br>
Content-Type: text/plain; charset="utf-8"<br>
<br>
Not sure you want it in the public domain. It is clearly a 'variant of<br>
concern'.?<br>
<br>
On Mon, Mar 7, 2022, 8:12 AM , <<a href="mailto:ajheggie@gmail.com">ajheggie@gmail.com</a>> wrote:<br>
<br>
> On Mon, 7 Mar 2022 at 02:50, A J <<a href="mailto:awingle@hotmail.com">awingle@hotmail.com</a>> wrote:<br>
> ><br>
> > I've been working with a new stove design that is showing a lot of<br>
> promise to char a load of wood.<br>
> ><br>
> > The stove has no primary air holes in the Fuel chamber.<br>
> ><br>
> > A 3 1/2" metal screen cylinder is placed in the center of the fuel<br>
> chamber (16 quart bucket with a lid with a 4" exhaust hole) Wood Pellets<br>
> are added around the screen and filled to the top, just below the air<br>
> inlets. The screen leaves an open hole in the fuel chamber from the top to<br>
> the bottom.<br>
> ><br>
> > I then added soil on top of the fuel Pellets. I packed it about an inch<br>
> deep next to the screen and kept adding the soil over the top of the<br>
> pellets, but left a 1" ring of exposed pellets next to the fuel chamber<br>
> walls. This "ring" supplies the primary air.<br>
><br>
> A picture is worth a thousand words as they say Aaron, any chance of a<br>
> sketch of the layout for those of us who have trouble visualising your<br>
> layout?<br>
><br>
> Andrew<br>
><br>
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End of Stoves Digest, Vol 139, Issue 6<br>
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