[Stoves] Fly ash and bottom ash composition in biomass fuelled stoves
Paul Anderson
psanders at ilstu.edu
Wed Aug 2 11:11:10 CDT 2017
Tom, Philip, Crispin, and all,
Yes, interesting.
My question is about pyrolytic-only gasifiers that leave large amounts
of char behind, especially as in the TLUD situation. I have thought
(assumed, maybe incorrectly) that the ash is constrained ("held" or
never formed) in the charcoal (except for the edges of the charcoal that
might have some char-gasification occuring. If I am correct, this would
be a contributing factor for TLUD stoves to have low particulate emissions.
Please clarify: is the ash being discussed in the size of <PM2.5? Or
is it larger stuff?
Paul
Doc / Dr TLUD / Prof. Paul S. Anderson, PhD
Email: psanders at ilstu.edu
Skype: paultlud Phone: +1-309-452-7072
Website: www.drtlud.com
On 8/2/2017 10:23 AM, Tom Miles wrote:
>
> Thanks Philip. Interesting source. That’s the world I work in.
>
> Tom
>
> *From:*Stoves [mailto:stoves-bounces at lists.bioenergylists.org] *On
> Behalf Of *IPC
> *Sent:* Tuesday, August 01, 2017 3:10 AM
> *To:* 'Discussion of biomass cooking stoves'
> <stoves at lists.bioenergylists.org>
> *Cc:* 'Crispin Pemberton-Pigott' <crispinpigott at outlook.com>
> *Subject:* [Stoves] Fly ash and bottom ash composition in biomass
> fuelled stoves
>
> Interesting general conclusions from industrial practice at
> http://www.biofact.eu/biomass-inorganic-split/
>
> Prof Philip Lloyd
>
> Energy Institute, CPUT
>
> SARETEC, Sachs Circle
>
> Bellville
>
> Tel 021 959 4323
>
> Cell 083 441 5247
>
> PA Nadia 021 959 4330
>
> *From:*Stoves [mailto:stoves-bounces at lists.bioenergylists.org] *On
> Behalf Of *Nikhil Desai
> *Sent:* Thursday, July 27, 2017 6:07 PM
> *To:* Discussion of biomass cooking stoves
> *Cc:* Crispin Pemberton-Pigott
> *Subject:* Re: [Stoves] New video from Tajikistan and Kyrgyzstan stove
> pilots
>
> Crispin, Paul:
>
> A dumb question: Is it the production of gases or the high
> temperatures -- or some sequence thereof -- which makes for very low
> emission rates independent of fuel type and quality? Or is it the
> relatively steady power requirements of a heating stove?
>
> It suddenly dawned on me - reading a children's book - that the type
> of large heating stove used in Europe that also doubled for cooking
> was because of the type of cooking: grilling, roasting, soups and
> stews, but less of frying and spicing as in Asia.
>
> Or that the cuisine responded to the availability of energy delivery
> system.
>
> Bernard Lewis wrote a brilliant essay called "In the Finger Zone",
> where he said (writing from memory), "The world can be divided in
> three areas by way of eating: fork zone, finger zone, chopstick zone.
> These areas are also roughly fresh cream zone, sour cream (or yoghurt)
> zone, and no cream zone."
>
> Now I am thinking of world geographies and human cooking histories as
> "Cookstove zone, Heating and cooking stoves zone, and Combo stove zone."
>
> I still hold that for cooking-only stoves with a rich enough menu,
> biomass of low energy density has different emission rates according
> to fuel quality (and operating practices, of course). That a WBT can
> deliver "stove performance" independent of fuel quality is
> presumptively dubious.
>
> Nikhil
>
>
> ------------------------------------------------------------------------
> Nikhil Desai
>
> (US +1) 202 568 5831
> /Skype: nikhildesai888/
>
> On Thu, Jul 27, 2017 at 12:12 PM, Crispin Pemberton-Pigott
> <crispinpigott at outlook.com <mailto:crispinpigott at outlook.com>> wrote:
>
> Thanks Michael!
>
> At the moment the engineer, Ulan, and team are preparing a producer’s
> manual and an installation manual. The latter is very interesting
> because they have worked out how to install these stoves (4 models)
> into a wide range of home types, in some cases where the existing
> product being removed is /completely/ different in the way it fits
> into the building. Often the traditional stove is a structural element
> in a wall!
>
> The fuels vary widely. In one region it is almost exclusively walnut!
> OMG. A lot of fruit wood is burned, a lot of dung for cooking and coal
> for heating (same stove). Cotton stalks are popular in that whole
> region. It is difficult to burn slowly.
>
> There is a lot of new work going on. CARITAS Switzerland is working in
> Tajikistan (Jonas Haller) and he is just starting to produce 700
> stoves for this season, two models 350 of each. We were collaborating
> on Skype to get the parts nested better and it is amazing how much
> better two heads work than one. Jonas is producing them in Muminabad
> in the deep south, one of the poorest regions of the poorest country
> in the former Soviet Union.
>
> Regards
>
> Crispin
>
> Crispin keep on trucking--
>
> On Thu, Jul 27, 2017 at 10:37 PM, Crispin Pemberton-Pigott
> <crispinpigott at outlook.com <mailto:crispinpigott at outlook.com>> wrote:
>
> Dear Friends
>
> The WB has put out a new combined video showing scenes from the
> two countries and it is available
> here<http://www.worldbank.org/en/news/video/2017/06/20/clean-individual-heating-solutions-in-the-kyrgyz-republic-and-tajikistan>.
>
> The is a very brief shot of the gas flame at about 1:25. That is
> the Model 4 crossdraft coal gasifier flame. Note the colour. When
> the cover is on, it burns with less disturbance but that is hard
> to show without a glass cover.
>
> There is also a good view towards the end of a TLUD gasifier which
> has a burn time of about 9 hours. The only fuel provided to
> schools is a very poor quality 'Aine coal' which is about 50%
> rock. It looks like black rock to start and white rock after
> burning. That TLUD is able to burn it properly provided there is
> sufficient draft, which means a 5m chimney. Achieving that was
> quite difficult, I admit and was only solve on literally the last
> day of the trip in November.
>
> There are two videos now but I think the other one has been
> referenced here before. The new one is combined. A total of 91
> homes were involved in the pilot in the two countries. The PM
> reduction numbers mentioned are modest, the true figures for the
> Models 4 and 5 coal stove are closer to 99.9%.
>
> Regards
> Crispin
>
>
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