[Stoves] Stoves Digest, Vol 139, Issue 6
Norman Baker
ntbakerphd at gmail.com
Mon Mar 7 12:44:48 CST 2022
Alex;
Variant of concern? What is that about?
Norm
On Mon, Mar 7, 2022 at 10:04 AM <stoves-request at lists.bioenergylists.org>
wrote:
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> Today's Topics:
>
> 1. Re: This is not a TLUD stove. (A J)
> 2. Re: This is not a TLUD stove. (Crispin Pemberton-Pigott)
> 3. Re: This is not a TLUD stove. (ajheggie at gmail.com)
> 4. Re: This is not a TLUD stove. (alex english)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sun, 6 Mar 2022 19:21:14 +0000
> From: A J <awingle at hotmail.com>
> To: "stoves at lists.bioenergylists.org"
> <stoves at lists.bioenergylists.org>
> Subject: Re: [Stoves] This is not a TLUD stove.
> Message-ID:
> <
> DM6PR06MB65082C7863AE8CF14FD020BEB0079 at DM6PR06MB6508.namprd06.prod.outlook.com
> >
>
> Content-Type: text/plain; charset="iso-8859-1"
>
> I've been working with a new stove design that is showing a lot of promise
> to char a load of wood.
>
> The stove has no primary air holes in the Fuel chamber.
>
> 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.
>
> 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.
>
> I add 1/4 cup of gasoline into the bottom of the screen, then ignite the
> gas.
>
> 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.
>
> 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.
>
> 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.
>
> 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.
>
> This video is from the end of the burn. You can see glowing embers
> appearing on the outer ring.
>
> https://youtu.be/3xSp3RfIzxU
>
> 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.
>
>
>
>
>
>
>
>
>
>
>
>
>
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> ------------------------------
>
> Message: 2
> Date: Sun, 6 Mar 2022 20:14:14 +0000
> From: Crispin Pemberton-Pigott <crispinpigott at outlook.com>
> To: Discussion of biomass cooking stoves
> <stoves at lists.bioenergylists.org>
> Subject: Re: [Stoves] This is not a TLUD stove.
> Message-ID:
> <
> DM5PR18MB213664D601C6AC67B7402CF8B1079 at DM5PR18MB2136.namprd18.prod.outlook.com
> >
>
> Content-Type: text/plain; charset="us-ascii"
>
> Dear Andrew
>
> 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.
>
> It sounds good. Does it burn to completion? How does the "activity" change
> as the fuel disappears?
>
> Interesting work.
> Crispin
>
>
>
>
> From: Stoves <stoves-bounces at lists.bioenergylists.org> On Behalf Of A J
> Sent: Sunday, March 06, 2022 12:21
> To: stoves at lists.bioenergylists.org
> Subject: Re: [Stoves] This is not a TLUD stove.
>
> I've been working with a new stove design that is showing a lot of promise
> to char a load of wood.
>
> The stove has no primary air holes in the Fuel chamber.
>
> 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.
>
> 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.
>
> I add 1/4 cup of gasoline into the bottom of the screen, then ignite the
> gas.
>
> 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.
>
> 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.
>
> 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.
>
> 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.
>
> This video is from the end of the burn. You can see glowing embers
> appearing on the outer ring.
>
> https://youtu.be/3xSp3RfIzxU
>
> 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.
>
>
>
>
>
>
>
>
>
>
>
>
>
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>
> ------------------------------
>
> Message: 3
> Date: Mon, 7 Mar 2022 13:07:36 +0000
> From: ajheggie at gmail.com
> To: Discussion of biomass cooking stoves
> <stoves at lists.bioenergylists.org>
> Subject: Re: [Stoves] This is not a TLUD stove.
> Message-ID:
> <
> CAPSaZeZdSMPsH-s5Lk-vaVpxgdRkzLD0u57oFUjbAwFTXBTHgw at mail.gmail.com>
> Content-Type: text/plain; charset="UTF-8"
>
> On Mon, 7 Mar 2022 at 02:50, A J <awingle at hotmail.com> wrote:
> >
> > I've been working with a new stove design that is showing a lot of
> promise to char a load of wood.
> >
> > The stove has no primary air holes in the Fuel chamber.
> >
> > 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.
> >
> > 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.
>
> A picture is worth a thousand words as they say Aaron, any chance of a
> sketch of the layout for those of us who have trouble visualising your
> layout?
>
> Andrew
>
>
>
> ------------------------------
>
> Message: 4
> Date: Mon, 7 Mar 2022 08:24:29 -0500
> From: alex english <aenglish444 at gmail.com>
> To: ajheggie at gmail.com, Discussion of biomass cooking stoves
> <stoves at lists.bioenergylists.org>
> Subject: Re: [Stoves] This is not a TLUD stove.
> Message-ID:
> <CA+6hwOp9L8n3G0fQaG=
> 87YLo3VsAnkZBv7CWbFa24Gij9sanSg at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Not sure you want it in the public domain. It is clearly a 'variant of
> concern'.?
>
> On Mon, Mar 7, 2022, 8:12 AM , <ajheggie at gmail.com> wrote:
>
> > On Mon, 7 Mar 2022 at 02:50, A J <awingle at hotmail.com> wrote:
> > >
> > > I've been working with a new stove design that is showing a lot of
> > promise to char a load of wood.
> > >
> > > The stove has no primary air holes in the Fuel chamber.
> > >
> > > 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.
> > >
> > > 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.
> >
> > A picture is worth a thousand words as they say Aaron, any chance of a
> > sketch of the layout for those of us who have trouble visualising your
> > layout?
> >
> > Andrew
> >
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> >
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> > http://stoves.bioenergylists.org/
> >
> >
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> ------------------------------
>
> End of Stoves Digest, Vol 139, Issue 6
> **************************************
>
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