[Stoves] More about concentrators.

[Julien Winter]

Hi Norm;

The photograph is of a double-walled TLUD with pre-heated secondary air.
The 55 gal. drum has no bottom.   The 35 gal drum is the TLUD reactor.

However, I have put the same burner on at single-walled 55 gal. TLUD, with
a gap between the top of the drum and the lid supporting the burner.

Cheers,
Julien.

On Thu, Mar 28, 2019 at 10:22 PM Norman Baker <ntbakerphd at gmail.com> wrote:

> 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
>>
>

-- 
Julien Winter
Cobourg, ON, CANADA
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