[Stoves] Update on new approach: Simple natural draft TLUD

[Paul Anderson]

Jock,

Seeking to understand your configuration.

1.  First photo says Primary air holes @ 7/16ths. Which would be almost 
8 / 16th or almost 1/2 inch.   Does not look like the holes are that big.

2.  You do not have a concentrator hole.   Instead you have 2 concentric 
rows of holes (photo 2).   But does the secondary air enter UNDER the 
piece through a gap, or does the secondary air only meet the gases as 
the gases come out of the holes?

Looking forward to the video.

Paul

Doc  /  Dr TLUD  /  Prof. Paul S. Anderson, PhD
Email:  psanders at ilstu.edu
Skype:   paultlud    Phone: +1-309-452-7072
Website:  www.drtlud.com

On 9/10/2017 4:36 PM, Jock Gill wrote:
>
>
>
> Primary air holes @ 7/16ths
>
>
>
> Vent holes.  Outer ring has 33 holes of 1/4 inch.  Inner rowing has 20 
> holes of 5/16ths.
>
> The secondary air is pulled into the fire via the Venturi effect.  Hot 
> gases rising pull in the cooler, but per-heated, secondary air that 
> rise between the cap can and the reactor can.  Note: It appears that 
> the diameter of the cap with vent holes divided by the diameter of the 
> reactor can should be at least 1.6
>
>
>
> The rector can can is about 6 inches in diameter.  It started life as 
> a three pound Costco coffee can.
>
> The cap sits on three angle brackets that create a gap of about 3 MM 
> between the top of the reactor and the cap. The secondary air enters 
> through this 360 degree gap.  The cap extends about 2 CM down the 
> sides of the reactor can.
>
> The photo show the system as configured for my last test. Achieved 
> 1,000 F in the draft can on top.  Made some pretty good charcoal too.  
> 450 grams of softwood pellets went for about 37:30.
>
> The performance/results can be varied by the height of, or absence of, 
> the draft can.  Also vent holes can be filled with bolts to reduce the 
> draft.  Runs times can be extended to 50 minutes, but there will be 
> quite a few pellets that are not charred or are only partially 
> charred.  Longer run times have, not surprisingly, lower temperature 
> yields.
>
> A 20 second video to follow.  As you will see, this is not a 
> completely smoke free set up at this stage of development.  Some 
> tuning appears to be required.  Perhaps 1000 grams of fuel, as 450 
> grams leaves most of the reactor can empty.  More fuel will modify the 
> draft forces.  Could be good or could be bad.
>
> Thoughts?  Suggestions?
>
> Cheers,
>
> Jock
>
> Jock Gill
> P. O. Box 3
> Peacham, VT 05862
>
> Cell: (617) 449-8111
>
> Extract CO2 from the atmosphere!
>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20170910/30efd539/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: FullSizeRender.jpg
Type: image/jpeg
Size: 68008 bytes
Desc: not available
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20170910/30efd539/attachment.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: FullSizeRender.jpg
Type: image/jpeg
Size: 64489 bytes
Desc: not available
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20170910/30efd539/attachment-0001.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: FullSizeRender.jpg
Type: image/jpeg
Size: 135936 bytes
Desc: not available
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20170910/30efd539/attachment-0002.jpg>