[Stoves] TLUD coal burner in Tajikistan

[ajheggie at gmail.com]

[Default] On Sun, 13 Mar 2016 16:14:45 +0800,Crispin Pemberton-Pigott
<crispinpigott at outlook.com> wrote:

>You can see the
>The outside temperature in the centre of the height rises to about 540 C once the pyrolysis layer passes by. This gives it a heating efficiency of about 50% without applying any of the stack heat to another task. To bring this number down and send more into the axhause it would be necessary to place some sort of ceramic lining in the chamber. 

If the temperature is that low (maybe apart from the final burnout at
the bottom which would need refractory??) why not have an outer skin
of sheet steel in which the secondary air is preheated? This outer
sheet could then be insulated on the outside to keep down overall heat
losses.

AJH