[Stoves] The Art of Using Grass Bundles in TLUD Stoves

[Lanny Henson]

Julien,
Have you tried top lighting the 30 gal drum of straw?
Do you have problems maintaining an open, central, air flow, pathway?
Lanny

----- Original Message ----- 
From: "Julien Winter" <winter.julien at gmail.com>
To: <stoves at lists.bioenergylists.org>
Cc: "David Yarrow" <dyarrow5 at gmail.com>
Sent: Tuesday, April 09, 2013 8:19 AM
Subject: [Stoves] The Art of Using Grass Bundles in TLUD Stoves


> Hello Stovers;
>
> Thanks for all the excellent advice on using wheat straw as a fuel.
> I ran some tests over the weekend, and I have summarized the results
> with photos in an attached pdf.
>
> The problem is that compact straw is good heat insulator and resists
> convection by air.  So it is difficult to sustain the momentum of a
> gasification reaction in the neighborhood of 700 C or more.
>
> What I did was to compact straw into a paint can, but with a
> cylindrical hole up the middle, then lit the straw at the bottom of
> the hole.  This was successful in paint cans, but not when I scaled up
> to a 30 US-gallon drum, because the linear distance for convection of
> oxygen and heat became too great.  So, next weekend I will have to do
> some more mucking around.
>
> I will let you know how I get on in a week or so.
>
> All the best,
> Julien
>
> -- 
> Julien Winter
> Cobourg, ON, CANADA
>


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