[Stoves] DIY camping TLUD with walnut shell fuel

[Jock Gill]

Alex,

It may be a matter of scale. In a small tin can TLUD, the rate of gas production low at start rapidly in crease, is reasonably stable for a bit and then rapidly decreases. Easily demonstrated.

Jock

Jock Gill
P. O. Box 3
Peacham, VT 05862

Cell: (617) 449-8111

Extract CO2 from the atmosphere!

> On Jun 16, 2016, at 8:36 AM, alex english <aenglish444 at gmail.com> wrote:
> 
> Wow. After all the time I spent with TLUDs, I would have described it as the opposite. The most linear self regulating simple combustion system. 
> Vive la difference!
> Alex
> 
>> On Jun 16, 2016 8:12 AM, "Jock Gill" <jock at jockgill.com> wrote:
>> Basically a TLUD is a very non linear system.  It is extremely hard to maintain an ideal fuel to air ratio. The hotter it gets, the more gas it produces,  the higher the flames, the hotter it gets. It is hard to create the degree of turbulence for proper mixing. It is hard to maintain useful residence times in the combustion zone. It is a nasty feedback loop that is difficult  to work with.
>> 
>> Se my work with flame retention played and flame deflectors.
>> 
>> Jock Gill
>> P. O. Box 3
>> Peacham, VT 05862
>> 
>> Cell: (617) 449-8111
>> 
>> Extract CO2 from the atmosphere!
>> 
>>> On Jun 15, 2016, at 5:06 AM, Mangolazi <mangolazi at yahoo.com> wrote:
>>> 
>>> I've always wondered what causes that towering inferno to occur. I've had this happen a few times with a tiny tin can stove and with a big paint can biochar burner. I try to avoid it so my pots don't get damaged. 
>>> 
>>> Is it too much primary air? Lots of wood gas from certain fuels? Fast gas flow from a tall chimney? 
>>> 
>>> Looking at a bunch of papers on TLUDs, it seems there's a trade off between temperature and burn time. You can throttle primary air to get a long burn time but temperatures may not get high enough to burn cleanly, whereas a more complete and hotter burn means the fuel is turned to char much faster. 
>>> 
>>>> On June 15, 2016 6:23:02 AM GMT+08:00, neiltm at uwclub.net wrote:
>>>>> On 14 Jun 2016 at 16:17, Mangolazi wrote:
>>>>> 
>>>>> Hi Neil, thanks for the recommendations. I think I'll get one of
>>>>> those cheap Chinese stoves to see what they can do. Most of them
>>>>> look the same so I assume they're all from the same factory.
>>>> 
>>>> They do seem to be all the same.  The main difference between them is
>>>> in 
>>>> which type of pot support/concentrator top you choose.  There are the 
>>>> fold out sort, with a gap between top of concentrator and pot of 2cm,
>>>> and
>>>> the fixed higher rise top (4.5cm) with open side that permits easier
>>>> fuel
>>>> feeding without removing the pot.  I have both, and now prefer the
>>>> latter
>>>> as the increased height between secondary air holes and pot makes for a
>>>> 
>>>> slightly cleaner burn, and interferes less with the draught.  It has 
>>>> closer support points though, although I have yet to suffer instability
>>>> 
>>>> from that.  All the parts between the two stoves, bought years apart,
>>>> are
>>>> interchangeable.
>>>> 
>>>>> They're
>>>>> also rather squat - more power, less run time? 
>>>> 
>>>> They are squat, but run time really depends on the fuel.  It is about
>>>> 10 
>>>> mins of towering inferno run as a TLUD with dry wood, but double that
>>>> and
>>>> up to half an hour with moister/denser/larger fuel, and I've read an
>> 
>> _______________________________________________
>> 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/
> _______________________________________________
> 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/
> 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20160616/6b3492cf/attachment.html>