[Stoves] Wood fired, two-stage gasification employed

Thu Aug 4 03:24:36 CDT 2011

Dear Crispin,
I'll try to find out.
regards,
Ron

-----Ursprüngliche Nachricht-----
Von: "Crispin Pemberton-Pigott" <crispinpigott at gmail.com>
Gesendet: Aug 4, 2011 4:53:40 AM
An: "Discussion of biomass cooking stoves" <stoves at lists.bioenergylists.org>
Betreff: Re: [Stoves] Wood fired, two-stage gasification employed

>Dear Robert and anyone who can help:
>
>The emissions are given per cubic metre. It is likely that the flue gas measurements are normalised to a certain oxygen level, for example 7% or 11%. Does anyone know what the O2 level is when reporting the CO limit, for example?
>
>The number is not meaningful unless the dilution value is known. Because of the confusion created by having in Europe a different dilution factor for each fuel I advocate that all emissions be calculated at 0% O2 (no dilution at all) because a) it is easy to calculate and b) everything is directly comparable (different fuels and stoves).
>Whatever the dilution factor is the corrected emission numbers is per M^3 seem pretty high.
>
>Interesting.
>
>Regards
>Crispin
>-----Original Message-----
>From: "Robert Taylor" <rt at ms1.hinet.net>
>Sender: stoves-bounces at lists.bioenergylists.org
>Date: Thu, 4 Aug 2011 07:49:07
>To: Discussion of biomass cooking stoves<stoves at lists.bioenergylists.org>
>Reply-To: Discussion of biomass cooking stoves
> <stoves at lists.bioenergylists.org>
>Subject: Re: [Stoves] Wood fired, two-stage gasification employed
>
>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
>
>
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