[Stoves] Wood fired, two-stage gasification employed

[Robert Taylor]

Here's a rough and ready translation of the German in the two pages that 
Martin links to:

Umwelttechnik:



Environmental technology



To reduce environmental loads, the legal limits on CO and fine particulate 
emissions have been redefined. The planned limits are:



Fine particulates:

Legal limit from 2008: 100 mg/m3; from 2015: 40 mg/m3

xeoos Twinfire emissions, 2008: 22 mg/m3



Carbon monoxide:

Legal limit from 2008: 2000 mg/m3; from 2015: 1250 mg/m3

xeoos Twinfire emissions, 2008: 625 mg/m3





The xeoos, with its patented combustion process, not only meets these 
values, but goes far below them, even at partial or minimum loads. This is 
achieved by:



- Burning exhaust gases at 1000-1200 deg C

- 180-degree inertial separation of suspended particulates from exhaust 
gases in lower combustion chamber

- intelligent air routing inside stove leads to maximum heat transfer into 
room





Brenntechnik:



Combustion technology



In the xeoos Twinfire combustion process, the exhaust gases created by the 
burning of wood in the upper combustion chamber undergo an afterburn at 
temperatures of 1000-1200 deg C and are thus converted into additional heat 
and energy. In this way the xeoos achieves:



- efficiency of over 90% throughout the burn period

- up to 40% less ash generation for the same heat output, compared to a 
xeoos fireplace stove not operating in twinfire mode

- up to 40% lower fuel consumption for the same heat output, compared to a 
xeoos fireplace stove not operating in twinfire mode

- extremely low proportion of fine particulates, and very low proportion of 
CO, in exhaust gases

- consistently low emissions even at partial or minimum load



Facts:

- body in steel sheet 4 mm thick

- front frame in gray cast iron

- combustion chamber cladding in vermiculite

- combustion chamber floor in special refractory* material

(*the meaning of the German word is probably more specific than this; see 
"Schamotte" in German Wikipedia)

- double floor in highly heat resistant stainless* steel

(*"Edelstahl" is usually translated as "stainless steel", but not every 
Edelstahl is stainless, and not every stainless steel is an Edelstahl; the 
term covers various special-purpose steels, as defined by the relevant 
standards)

- twinfire grate in highly heat resistant stainless steel

- ash box in highly heat resistant stainless steel

- simple, ergonomic control via two thermally decoupled control elements

- free choice of top or rear flue outlet

- all stoves can be equipped with xeoos adaptor for external combustion air 
feed

- xeoos stoves can optionally be equipped to be rotatable

- the xeoos burns with normal chimney draft

- five years' warranty on body





Figure:



Twinfire tuner

Door handle/Twinfire starter

Upper combustion chamber

Twinfire grate

Lower combustion chamber

Ash box





HTH



Robert Taylor



----- Original Message ----- 
From: "Boll, Martin Dr." <boll.bn at t-online.de>
To: <stoves at lists.bioenergylists.org>; "'Crispin Pemberton-Pigott'" 
<crispinpigott at gmail.com>
Sent: Thursday, August 04, 2011 6:10 AM
Subject: Re: [Stoves] Wood fired, two-stage gasification employed


> Crispin,
>
> There is another two-stage top to bottom burning room-heating-stove. I saw
> it some years ago here in Hatzfeld-Reddighausen, Germany, in the show-room
> of the producer.
> It has natural draft!
> The website is in German, Swedish and Polish, not in English. But the 
> pages
> on bottom have pictures and short technical terms.
> It is certainly even eco and bio but they do not make so much music about
> that.
> http://www.xeoos.de/technik/umwelttechnik.html
>
> http://www.xeoos.de/technik/brenntechnik.html
>
> - Interested in your meaning -
>
> Kind Regards
> Martin