[Stoves] Thermo Biopile

[Boll, Martin Dr.]

Andrew,
I think the French bio-pile-model is in fact a two different devices model,
but locally connected.
As in the movie shown
(http://biomeiler.at/index.php?id_seite=4696&PHPSESSID=c5a1744415a821c121df1
6ad38887a4b ), there is a container in the middle of the bio-pile.
This separates the content of the container from the outer bio-pile.
It is not clearly said in the movie, but I think the container is the
_realy_ anerobic part of the system, which produces methane. The favour of
that is clear: The constant high temperature for the methane digester, which
is the problem in colder regions.

I did not see in the movie, how the methane-digester is filled or re-filled.
-Possible by a charging- and a de-charging-tube.


Regards

Martin

> 
> ------------------------------
> 
> Message: 8
> Date: Tue, 18 Sep 2007 11:59:59 +0100
> From: AJH <list at sylva.icuklive.co.uk>
> Subject: Re: [Stoves] Thermo Biopile
> To: Discussion of biomass cooking stoves <stoves at listserv.repp.org>
> Message-ID: <cibve3t5r6pnmomh5mb5v4ni2rapjcagk0 at 4ax.com>
> Content-Type: text/plain; charset=us-ascii
> 
> On Mon, 17 Sep 2007 21:37:23 -0400 (EDT), Jeff Davis wrote:
> 
> >Martin wrote:
> >> About far more than 20 (??) years ago I read about big bio-piles which
> >> where built in the south of France in order to recuperate heat.
> >
> >Sounds like Mr. Jean Pain.
> 
> A hotel in south west England did much the same using forestry
> residues with a very long alkathene (plastic water pipe) pipe running
> through. It must have been difficult to keep it aerated as our chip
> heaps go anaerobic quite quickly.
> 
> AJH
> 
> 
> 
> 
> ------------------------------
> 
> Message: 9
> Date: Tue, 18 Sep 2007 12:06:49 +0100
> From: AJH <list at sylva.icuklive.co.uk>
> Subject: Re: [Stoves] Thermo Biopile
> To: Discussion of biomass cooking stoves <stoves at listserv.repp.org>
> Message-ID: <t9cve3907ep73k1n3vm0ngbq5olpdoc3fv at 4ax.com>
> Content-Type: text/plain; charset=us-ascii
> 
> On Mon, 17 Sep 2007 16:26:23 -0700 (PDT), Mr. Dean Still wrote:
> 
> >The compost pile in the house produces methane,
> 
> It shouldn't, composting is akin to very slow combustion and ideally
> should give off only CO2 and steam. Methanogenic bacteria seem to need
> anaerobic conditions. The trouble with these microbial methods is that
> the retention times get so great to be able to produce a decent
> proportion of the available heat, so the power to volume ratio is low.
> 
> AJH
> 
> 
> 
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> End of Stoves Digest, Vol 15, Issue 28
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