[Stoves] FW: Toucan Flair

Erin Rasmussen erin at trmiles.com
Tue Oct 4 19:40:10 CDT 2011


Hugh McLaughlin has introduced an innovation to the TLUD he calls the Toucan
Flair. 

See the pictures on the stoves site:
http://stoves.bioenergylists.org/en/content/toucan-flair

 

the detail is in his email, below. ( Erin)

From: Hugh McLaughlin [mailto:wastemin1 at verizon.net] 
Sent: Thursday, September 29, 2011 2:42 PM
To: tmiles at trmiles.com; psanders at ilstu.edu
Cc: wastemin1 at verizon.net; thomas reed; CHRISTA ROTH
Subject: Toucan Flair

 

I may have solved a design issue with the combustion of the wood gas in a
TLUD. I call it the "Toucan Flair", which is a play on words (flair > flare)
because the distinguishing feature is an axial tube providing "axial air" to
the secondary combustion zone. This axial air source is coupled to the
primary air source, which is controlled by a small fan pressurizing a plenum
to support the two burners provided for the entire stove.

 

Additional "scroll air" enters in the riser above the ignition level for the
wood gas, providing a concentrated region of combustion. Depending on how
much wood gas is generated, as controlled by the degree of fan assist, the
flames can be driven to the bottom of the pot, but the unit can also simmer
as required (see photos).

This geometry basically turns the concentrator disk inside out - and make
for a preheated expanding jet of wood gas, that is consumed by the excess
scroll air. Axial and scroll are burner terms for air injected inside the
fuel and provided on the perimeter of the fuel. The terms may well be
engineering slang. However, the effect is significant, based on my
comparison of the side by side configurations (Toucan Flair versus
traditional concentrator disk TLUD).

As is always the case, the challenge is how to disseminate knowledge in the
stove space.

Feel free to post this to the lists, if that helps.

- Hugh

 

 

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