[Stoves] [Gasification] Heating/thermal usage - China workshopnotes

[AJH]

On Sun, 6 Aug 2006 15:03:27 -0300, Kevin Chisholm wrote:

>Would someone be able to explain how a device that was started up as a T-LUD 
>could be operated on a continuous basis as a T-LUD?

One of the properties of the TLUD stove is that with a given fuel
supply the pyrolysis front descends at a fairly constant rate and
produces offgas at a fairly constant rate, subject to the resistance
to gases in the bed. So like an updraught co-current fuel feed such as
were used in adaptations to some steam trains, a feed mechanism
producing a "molehill" through which the primary air is also
delivered,  then the rate of descent of the pyrolysis could be matched
by a fuel feed pushing the fuel up. As long as the char spilling over
were not exposed to any secondary air it would be preserved. The
offgas effectively shielding it. This offgas then being burnt off
subsequently.

In fact, as the progress of the pyrolysis front is somewhat dependant
on moisture content of the wood you could operate the thing as an
updraught char burning gasifier.

AJH