[Stoves] FW: Toucan Flair

[rongretlarson at comcast.net]

Hugh: 

Thanks for sharing. I think this is a great way to explore and hope you will keep us informed. 

There was a brief exchange a few months ago with a team (Central America?) that had something similar, but with the several interior secondary air jets exiting radially, with their photo showing a really turbulent horizontal flame. I can't find that cite; anyone remember? 

Ron 

----- Original Message -----
From: "Erin Rasmussen" <erin at trmiles.com> 
To: "Discussion of biomass cooking stoves" <stoves at lists.bioenergylists.org> 
Sent: Tuesday, October 4, 2011 6:40:10 PM 
Subject: [Stoves] FW: Toucan Flair 




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 






_______________________________________________ 
Stoves mailing list 

to Send a Message to the list, use the email address 
stoves at lists.bioenergylists.org 

to UNSUBSCRIBE or Change your List Settings use the web page 
http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org 

for more Biomass Cooking Stoves, News and Information see our web site: 
http://www.bioenergylists.org/ 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20111005/5d9be989/attachment.html>