[Stoves] Understanding what TLUD means.... was Re: stoves and credits again

[Paul Anderson]

Crispin,

"TLUD" is the combustion processes associated with the Migratory 
Pyrolytic Front  (MPF). that creates the pyrolytic gases and leaves 
charcoal behind.  That does not change.  The other features of a "stove 
device" can be and are diverse.  And that is where we can find all of 
the variations that you mention.

If a stove COULD successfully operate with the MPF, it could be called a 
TLUD stove even if it can also be operated in other ways.

But if it COULD be with the MPF, but if it is mostly NOT being used with 
the MPF, calling it a TLUD gasifier stove is misleading.

[Note:  This same problem occurs with the "Rocket" combustion processes 
which (for the purists among us) should have the fuel-supporting shelf 
with air entering underneath until it comes up near the burning tips of 
the inserted fuel.   From my limited following of on-going Rocket stove 
designs and production, the shelf with associated tip-burning is often 
absent (by manufacturing or by user removal) but the name is still 
Rocket stove.  That is unfortunate, in part because the Rocket 
advantages are absent and should not be claimed by the different 
stove.   I do not want the TLUD distinctiveness to be claimed if the MPF 
is not an active part of the operation  of a stove that claims to  be a 
TLUD.]

Example:   If you filll a TLUD-capable fuel chamber with charcoal, there 
canNOT be a MPF.   Why?   Because there is no pyrolysis.   The fuel is 
ALREADY charcoal.   That operation might be driving off some  volatiles 
that then move upward, but that is not pyrolysis.

Note:  TLUD is an acronym for "Top-Lit UpDraft".   But the acronym is 
now a distincitive name in its own right.   And it is associated with 
the MPF and with dry biomass fuels.   If some other process has ignition 
at the top and has upward moving air flows, it can have any name you 
want to give it, but not the name TLUD.

As a rather absurd example, if there is a "Lignin Powered Gasifier" 
stove, it should not be called an LPG stove.  That would be misleading, 
would be false, and could probably cause some law suit from the big 
business of LPG.   I doubt that LPG is a registered trademark, but 
misuse of those letters would cause trouble.

So, please help to keep TLUD to mean things consistent with "woodgas" 
and "pyrolysis" and MPF.  Ify you discussing something else, then  come 
up with its own distinctive  and non-confusing name.

Persistent Paul


Doc  /  Dr TLUD  /  Prof. Paul S. Anderson, PhD
Email:  psanders at ilstu.edu
Skype:   paultlud    Phone: +1-309-452-7072
Website:  www.drtlud.com

On 9/30/2017 7:56 AM, Crispin Pemberton-Pigott wrote:
>
> Dear Persistent Paul
>
> I appreciate the way in which you have stuck to the promotion of 
> TLUD’s and show no signs of skacking.
>
>     *>>…*That establishes the principle that TLUD‎s can burn char.
>
> >No. The char yield is associated with some char combustion  during the 
> time of the pyrolysis, but that is not the same as having the char as 
> the input fuel.
>
> Well I just showed that char can be an input to a TLUD. I can burn 
> charcoal /only/ as an input fuel to a TLUD.  I have a set of cooking 
> photos used for promotion showing a Vesto operating as a TLUD charcoal 
> burner with a cooking plate in place of the pot. Charcoal stoves 
> operate much better, cleaner and longer when operated in TLUD mode. 
> TLUD was the standard operating method for the POCA which is a 
> charcoal-only stove.
>
I have replied to this in my above comments.   PSA
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