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

[Andrew Heggie]

On 13 December 2017 at 05:43, Frank Shields <franke at cruzio.com> wrote:

> This is an interesting topic and one i have wondered about. When packing
> hard a pipe with biomass then flushing with N2 then placing in an oven to
> heat from the outside to a temperature to 550c a lot of gases come out the
> small hole at the end.  That will ignite if the door is opened and O2
> contact. I have wondered if any heat is being produced in the pipe itself?
> or all from external heat? If there is it can't be much because the
> temperature advances at a continuous rate. Should you see the temperature
> jump well above 550c its because air leaked in to the furnace and there is
> a flame.
>

Frank it is interesting  what you seem to be showing when opening the door
is that the pyrolysis offgas coming out of the hole is above its
auotignition point.  What would be relevant to the current discussion is :
1 the temperature variation inside the tube

2 the varying analysis of the composition of offgas as the tube heats up.

Andrew
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20171214/516097ff/attachment.html>