[Stoves] Char from TLUDs and retorts

[Paul S. Anderson]

Andrew,

It was nice to have met you in London.

My question is below:

Quoting AJH <list at sylva.icuklive.co.uk>:

About the carbon conversion efficiency of the TLUD:
>
> I've not managed better than 25% of the dry weight, whereas with a low
> temperature retort I've achieved 45% albeit with a <80% fixed carbon,
> at a guess.

In the TLUD the heat for pyrolysis came from the fuel.  But in the retort, was
the heat from an outside source?  If so, how much heat, and how does that
amount of outside heat relate to the heat used by the TLUD?

Also, if the TLUD's 25% char was nearly 100% fixed carbon, and the 
retort's 45%
char was less than 80% fixed carbon, a full 20% of 45% (which is 9%) should be
reduced from the retort's output, meaning at best only 36% fixed carbon output
from the retort (with outside heat source) should be compared with the 
25% from
the TLUD that had to supply its own heat.

Are we seeing that TLUD production of char could be about as productive as
retort production of char?

Andrew, I am pushing the limits of my knowledge here.  Please be gentle as you
teach me!!!!    :-))

Paul

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