[Stoves] TLUD pellets stove with a venturi burner.
psanders at ilstu.edu
Wed Oct 7 21:43:45 MDT 2015
Nice work!!!! Kevin Adair is doing some venturi additions also.
Doc / Dr TLUD / Prof. Paul S. Anderson, PhD
Email: psanders at ilstu.edu
Skype: paultlud Phone: +1-309-452-7072
On 10/7/2015 5:09 PM, kgharris wrote:
> Nice. I would like to see test results for particulates. It should
> be very clean. It looks like it is loosely based on Crispins flame
> tube design with holes added in the tube where the Venturi low
> pressure area is. The holes are at the bottom of the burner, so there
> is better draft and a good burning area above. If I understand
> correctly Crispin is using the tube differently, to concentrate the
> heat and increase the dwell time for the flame in that hot
> environment. His secondary air is all added before the flame tube.
> Your design looks more compact and perhaps would be a better choice
> for a TLUD.
> There is a limit to how much gas the burner can handle. When the foil
> is removed and more primary air is added the burner is overloaded with
> gas and a tall diffusion flame forms. I have been trying to handle
> this problem by adding more mixing capability, and have had some
> improvment, but further work is needed. The problem with the mixing
> tubes I am using is that along the edges of the combustor, the air
> exiting the tubes exits at an angle instead of straight out. This
> holds the gasses below the burner along the edges, and adds to
> blowing them to the center, overloading the center of the mixer and
> wasting air at the edges of the combustor. This would not be a
> problem with your design. You might be able to use two or three of
> theses mixers side by side to gain a clean higher fire power.
> The concentrator ring is intended to mix the wood gas and air, and the
> Venturi mixer is intended to mix the wood gas and the air, so you have
> a duplicate mixing system. I am not saying good or bad, just
> something I notice.
> I see Julian has expressed some doubts about the Venturi concept.
> Good for him. I would be very happy if someone with adiquate
> equipment and technical ability proved or disproved the TLUD Venturi
> concept, either way. I perhaps will have to bite the bullet and buy a
> manometer with the ability to measure down to .001 inch of water
> column. My rather primative home made manometer did show a slight
> pressure drop at the mixer, but not enough to get any
> measurments. Our local college science department didn't seem to be
> Attached are some photos of the primary control valve I am currently
> using very successfully. It looks like something similar might work
> for you.
> Good work Roberto,
> ----- Original Message -----
> *From:* Roberto Poehlmann <mailto:roberto.poehlmann at gmail.com>
> *To:* stoves at lists.bioenergylists.org
> <mailto:stoves at lists.bioenergylists.org>
> *Sent:* Tuesday, October 06, 2015 5:53 PM
> *Subject:* [Stoves] TLUD pellets stove with a venturi burner.
> This is a video of one of my prototypes of a TLUD pellet stove.
> The difference with a "normal" TLUD burner, is that it has a 3
> inch tube with secondary air holes after the concentrator ring.
> On top of the the tube, i put a cone to expand the path of the
> gases, to shorten the flame, and to have a little internal chimney
> for draft.
> One advantage of this burner, is that you can also burn all of the
> charcoal made at the pyrolysis stage, with a nice secondary blue
> flame (if you wish) .
> Roberto Poehlmann
> Valdivia, Chile.
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the Stoves