[Stoves] DIY camping TLUD with walnut shell fuel

[kgharris]

Mangolazi,

Reducing the flame on a TLUD can be difficult.  The reduced gasses are
cooler than the high power gasses and are further cooled and diluted by the
also cooler secondary air.  Eventually the flame goes out.  Several (for
your stove 4 would probably work) small pilot holes drilled perhaps
1 to 2 cm down from the secondary air entrance will
feed a little  bit of air into the gas before it is diluted and cooled by
the secondary.  The resulting pilot flames keep flame presence and will heat 
and ignite the
remaining gas as it enters the secondary area.  It can give more turn-down.
Remember this is for small pilot flames, not the whole secondary flame, so
not to much.

Then you can put some sand or ash around the base of the stove to block some
of the air.  Add and remove sand/ash until the desired flame level is 
achieved.
Then add your wind shield.  Once you have a good mixture, you can design a
primary air control if desired.

I have included a photo of my efforts at a backpacking stove.  It is not the
cleanest and not ment to be adjustable, but it is simple, cheap, light
weight and works great for wilderness camping.  The top of the can is the
pot stand and the wire grate fits inside the bottom of the stove.  This way
you don't need to elevate the stove.

Best,

Kirk H.
----- Original Message ----- 
From: "Mangolazi" <mangolazi at yahoo.com>
To: <stoves at lists.bioenergylists.org>
Sent: Monday, June 13, 2016 2:28 AM
Subject: [Stoves] DIY camping TLUD with walnut shell fuel


Hi everyone,

I've been messing around with a tiny gasifier based on a peach can for
camping usage. I can get about 12 minutes flame time using twigs, although
the coals inside keep burning for a lot longer. I can boil 500 ml water in 7
minutes using twigs.

I recently added an outer vessel for windproofing and to preheat the
secondary air. Using walnut shells, I get a very hot and high flame, higher
than with peanut shells or twigs, with flames reaching almost to the top of
the pot. Total flame time goes up to 14 minutes and 500 ml water boils in 6
minutes, faster than before. Please see attached images.

How can I prevent the flame from going up so high?

Is it possible and feasible to throttle primary air on such small stoves?

Has anyone used peanut or walnut shells for daily cooking on a large TLUD?

Thanks!


--------------------------------------------------------------------------------


> _______________________________________________
> 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://stoves.bioenergylists.org/
>
>


--------------------------------------------------------------------------------


-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2016.0.7639 / Virus Database: 4598/12408 - Release Date: 06/12/16
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Backpacking stove.JPG
Type: image/jpeg
Size: 64714 bytes
Desc: not available
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20160614/470f187e/attachment.jpe>