[Stoves] More about concentrators.

[Norman Baker]

Julien;

Thank you so much. Now that I see the nozzle, I remember it well. Seems
like a good idea to promote mixing.

The 55 gal. barrel has holes in the bottom like a TLUD? And, I assume the
35 gal. is a retort?

By the way, David Yarrow now lives just south of Olympia Washington where
he is very active in a soils group called Nutriculture. Very interesting
man.

Norm

On Thu, Mar 28, 2019 at 4:41 PM Julien Winter <winter.julien at gmail.com>
wrote:

> Hi Norm;
>
> The nozzle discussed above would replace a concentrator ring in a ND-TLUD
> cookstove, or go at the bottom of an internal riser burner.
>
> For a 55 gallon TLUD, a nozzle can be adapted from black stove pipe
> expanding/reducing connectors.  There is a picture of one (attached) that I
> built in 2013, following the advice of David Yarrow.  It is a 35 gallon
> drum inside of a 55 gallon drum.  David suggested cutting diagonal slits in
> the side of the expanding connector to create a tertiary air entry point.
> Later, I attached three cable guy-wires, with turn-buckles, to stabilize
> the stack.   I don't have it any more.  I gave it away to a friend.
>
> For these nozzles, I assume that there is a large degree of mixing of
> secondary air and pyrolytic gases before they enter the nozzle.
>
> Cheers,
> Julien.
>
> On Thu, Mar 28, 2019 at 12:53 PM Norman Baker <ntbakerphd at gmail.com>
> wrote:
>
>> Julien;
>>
>> I'm not sure I entirely understand where you put the nozzle? Where would
>> you suggest in my 55 gal. TLUD?
>>
>> Norm
>>
>> On Thu, Mar 28, 2019 at 6:58 AM Anderson, Paul <psanders at ilstu.edu>
>> wrote:
>>
>>> Julien,    (and to the Stoves Listserv, and for posting at my website
>>> www.drtlud.com/eposts   )
>>>
>>>
>>>
>>> Interesting.
>>>
>>> Are the nozzles with slanted walls (like in a funnel) or with straight
>>> sides?    What diameters at each end for what sized of TLUD gasifiers?
>>>
>>>
>>>
>>> Paul
>>>
>>>
>>>
>>> Doc / Dr TLUD / Paul S. Anderson, PhD
>>>
>>> Exec. Dir. of Juntos Energy Solutions NFP
>>>
>>> Email:  psanders at ilstu.edu       Skype:   paultlud
>>>
>>> Phone:  Office: 309-452-7072    Mobile: 309-531-4434
>>>
>>> Website:   www.drtlud.com
>>>
>>>
>>>
>>> *From:* Julien Winter <winter.julien at gmail.com>
>>> *Sent:* Thursday, March 28, 2019 8:31 AM
>>> *To:* Norman Baker <ntbakerphd at gmail.com>
>>>
>>> Hi Norm;
>>>
>>>
>>>
>>> Instead of a concentrator ring, try a nozzle.    A nozzle brings the
>>> burning gases together without the shape edges of a concentrator ring.
>>>  The sharp edges could generate soot.  A nozzle has smooth edges.   TLUD
>>> nozzles are being manufactured, but they are being misused!!   People are
>>> turning them upside down and using them to load mason jars with food.   So,
>>> you can find TLUD nozzels on the shelves for food canning supplies in
>>> hardware stores.
>>>
>>>
>>>
>>> The reason why I got into the stove burner design business about five
>>> years ago was because when I used concentrator rings, I got deposits on the
>>> bottom of pots.
>>>
>>>
>>>
>>> Cheers,
>>>
>>> Julien.
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> On Thu, Mar 28, 2019 at 1:47 AM Norman Baker <ntbakerphd at gmail.com>
>>> wrote:
>>>
>>> Paul;
>>>
>>> I assume you mean the diameter of the stack or combustor? In prior tests
>>> with concentrator rings, a whole that has a diameter of 70% of the stack
>>> seem to be adequate. Lately, I have been going to about an 80%
>>> diameter.  In one publication I read the stack diameter should be at least
>>> 60% of the feedstock barrel diameter. Otherwise the time needed for gases
>>> to exit the combustor became too fast and hence too short for complete
>>> combustion. Is this your experience? And how about the rest of you chiming
>>> in on this.
>>>
>>>
>>>
>>> Norm
>>>
>>>
>>>
>>> On Wed, Mar 27, 2019 at 8:05 PM Anderson, Paul <psanders at ilstu.edu>
>>> wrote:
>>>
>>> Norm,
>>>
>>>
>>>
>>> In general, the diameter of the hole is about half of the diameter.
>>> But there might not be any visible (noticeable) impact if reduced or
>>> enlarge 10 to 20% of the size of the  hole.  Trial and error are your best
>>> bets to get this refined.
>>>
>>>
>>>
>>> I look forward to hearing of your results.
>>>
>>>
>>>
>>> Paul
>>>
>>>
>>>
>>>
>>>
>>
>
> --
> Julien Winter
> Cobourg, ON, CANADA
>
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