[Stoves] Understanding TLUDs, MPF and more. (was Re: Bangladesh TLUD )

[Andrew Heggie]

On Tue, 12 Dec 2017 02:29:42 +0000,Crispin Pemberton-Pigott
<crispinpigott at outlook.com> wrote:

>Dear Gordon
>
>The MPF in an Adams Report is seen when using small biomass, just as in a TLUD small-fuel pyrolyser. It is also seen in gasifiers that does not make char. The YDD charcoal gasifier (used to run engines) has an MPF and it burns pure charcoal. As Andrew says, it is a natural phenomenon, not something unique to TLUD's (or BLDD's) nor to char-makers.


That wilful misinterpretation of my post is another example of your spin.

We often see common words used in combinations that come to have a
meaning understood by all. Americans have some simple examples, side
and walk when combined become understood by everyone to mean a footway
at the side of a highway. The german language accepts portmanteau
words, an obvious one that springs to mind is combining National
Sozialistische Deutsche Arbeiterpartei which we english speakers know
as the national socialist party and wouldn't use that term to describe
anything else. More recently we have seen and old phenomenom mentioned
by John Evelyn in his 1662 book for making char in the open described
as flame curtain, we have come to accept this term for the process
because it is descriptive.

As I said there are many processes where a front moves steadily
through a medium but the term migrating pyrolysis front has come to be
understood as describing the TLUD process even if I prefer descending
pyrolysis front.


Andrew