[Stoves] Stoves Digest, Vol 14, Issue 17
Trevor Richards
febiochar at gmail.com
Thu Oct 13 03:53:30 CDT 2011
Tests I've seen on rice husk char showed 15% fixed carbon.
I do not recall seeing a biochar definition, specifying a minimum fixed C.
How low could the C% be & still be defined a biochar?
On 13 October 2011 03:00, <stoves-request at lists.bioenergylists.org> wrote:
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> Today's Topics:
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> 1. Re: burning rice husk (Crispin Pemberton-Pigott)
> 2. Re: burning rice husk (Crispin Pemberton-Pigott)
> 3. Re: burning rice husk (CHRISTA ROTH)
> 4. Re: burning rice husk (Frank Shields)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Wed, 12 Oct 2011 11:19:02 -0400
> From: "Crispin Pemberton-Pigott" <crispinpigott at gmail.com>
> To: "'Discussion of biomass cooking stoves'"
> <stoves at lists.bioenergylists.org>
> Subject: Re: [Stoves] burning rice husk
> Message-ID: <037501cc88f2$500af3e0$f020dba0$@gmail.com>
> Content-Type: text/plain; charset="us-ascii"
>
> Dear Christa
>
>
>
> There are other initiatives to make stoves based on the approach Alexis has
> taken. Paul has other models that show some promise as well.
>
>
>
> The Mayon Turbo Stove is not perfected yet and I don't think much is being
> invested in trying. It holds promise from the point that it does not
> require
> a fan. I worked on one here (in Waterloo) earlier this year together with
> two interns from REAP. We doubled the overall efficiency but created new
> problems that it got too hot. It needs additional work to keep the fuel
> cool. There are of course other ways to burn the fuel with natural draft.
> Maybe with the advent of cheap power from TEGs we will all make fan stoves
> and not worry about natural draft any more.
>
>
>
> The MTS has the important advantage that is can be refuelled continuously
> at
> your convenience. It does not need to be loaded in batches.
>
>
>
> Regards
>
> Crispin
>
>
>
>
>
>
>
> +++++++
>
>
>
> The best rice-husk burning stoves I know of are the ones based on the
> tremendous work of Alexis Belonio. Paul Olivier' s work in Vietnam has
> taken
> rice-husk burning stoves in the household-size range to another level,
> uncomparable with natural-draft stoves like the Mayon Turbo, LoTrau or
> whichever. Paul has generously shared a lot of his work on this list in the
> last days, so you can look more details up from the links provided there or
> consult the section on rice-husk burning gasifiers, pages 43-48 of the
> manual microgasification
> http://www.gtz.de/de/dokumente/giz2011-en-micro-gasification.pdf,
>
> it contains all I found as per last year. If anybody knows of models that
> are not included there, please let me know, so that they can be included in
> the next update.
>
> regards
>
> christa
>
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> ------------------------------
>
> Message: 2
> Date: Wed, 12 Oct 2011 11:19:02 -0400
> From: "Crispin Pemberton-Pigott" <crispinpigott at gmail.com>
> To: <rajan_jiby at dataone.in>, "'Discussion of biomass cooking stoves'"
> <stoves at lists.bioenergylists.org>
> Subject: Re: [Stoves] burning rice husk
> Message-ID: <037f01cc88f2$53782e30$fa688a90$@gmail.com>
> Content-Type: text/plain; charset="us-ascii"
>
> Dear Rajan
>
> One stove that burns whole rice hull efficiently is the Mayon Turbo Stove.
>
> Regards
> Crispin
>
>
> +++++++
>
> I do not know whether a stove can efficiently burn rice husk.
>
> But it seems rice husk can be burnt efficiently in FBC ( fluidised bed
> combustion ) boilers. There are several medium sized FBC boilers operated
> all over India. So the fuel need not go waste.
>
> Regards,
>
>
> Rajan
>
>
>
>
> ------------------------------
>
> Message: 3
> Date: Wed, 12 Oct 2011 17:39:49 +0000
> From: CHRISTA ROTH <stoves at foodandfuel.info>
> To: Discussion of biomass cooking stoves
> <stoves at lists.bioenergylists.org>
> Subject: Re: [Stoves] burning rice husk
> Message-ID: <B4B60F1C-E72F-44B4-8B49-6B22E3F30982 at foodandfuel.info>
> Content-Type: text/plain; charset="windows-1252"; Format="flowed";
> DelSp="yes"
>
> Crispin, see below:
> Am 12.10.2011 um 15:19 schrieb Crispin Pemberton-Pigott:
>
> > There are other initiatives to make stoves based on the approach
> > Alexis has taken. Paul has other models that show some promise as
> > well.
> CR: Which Paul do you mean? I was talking of Paul Olivier below, who
> has taken Belonios concept to a new era.
>
> >
> > The Mayon Turbo Stove is not perfected yet and I don?t think much is
> > being invested in trying. It holds promise from the point that it
> > does not require a fan. I worked on one here (in Waterloo) earlier
> > this year together with two interns from REAP. We doubled the
> > overall efficiency but created new problems that it got too hot. It
> > needs additional work to keep the fuel cool. There are of course
> > other ways to burn the fuel with natural draft. Maybe with the
> > advent of cheap power from TEGs we will all make fan stoves and not
> > worry about natural draft any more.
> >
> > The MTS has the important advantage that is can be refuelled
> > continuously at your convenience. It does not need to be loaded in
> > batches.
> CR: But the disadvantage I noted is that it needs a lot of attention:
> we had to tap the stove every two minutes last year in Belchertown
> with the colleagues from REAP to assist gravity and make the rice
> husks fall down, otherwise there was no continuous feed adn the fire
> would go out. Maybe that 'spoonfeeding' can be reduced with skills and
> acquired habits, but as an unskilled user I found it rather
> inconvenient.
> >
> > Regards
> > Crispin
> >
> >
> >
> > +++++++
> >
> > The best rice-husk burning stoves I know of are the ones based on
> > the tremendous work of Alexis Belonio. Paul Olivier' s work in
> > Vietnam has taken rice-husk burning stoves in the household-size
> > range to another level, uncomparable with natural-draft stoves like
> > the Mayon Turbo, LoTrau or whichever. Paul has generously shared a
> > lot of his work on this list in the last days, so you can look more
> > details up from the links provided there or consult the section on
> > rice-husk burning gasifiers, pages 43-48 of the manual
> > microgasification
> http://www.gtz.de/de/dokumente/giz2011-en-micro-gasification.pdf
> > ,
> > it contains all I found as per last year. If anybody knows of models
> > that are not included there, please let me know, so that they can be
> > included in the next update.
> > regards
> > christa
> > _______________________________________________
> > Stoves mailing list
> >
> > to Send a Message to the list, use the email address
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> >
> > to UNSUBSCRIBE or Change your List Settings use the web page
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> > for more Biomass Cooking Stoves, News and Information see our web
> > site:
> > http://www.bioenergylists.org/
> >
>
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>
> ------------------------------
>
> Message: 4
> Date: Wed, 12 Oct 2011 09:27:59 -0700
> From: "Frank Shields" <frank at compostlab.com>
> To: "'Discussion of biomass cooking stoves'"
> <stoves at lists.bioenergylists.org>, <rajan_jiby at dataone.in>
> Subject: Re: [Stoves] burning rice husk
> Message-ID: <EF2941FD30314943BF1939C78F58E7CE at cl.local>
> Content-Type: text/plain; charset="us-ascii"
>
> Stovers,
>
> I was talking to a rice grower in Northern Calif. and found out that Wild
> Rice has much less silica in the hulls than White Rice. I haven't tested
> wild rice hulls to confirm.
>
> Frank
>
> Frank Shields
> Control Laboratories, Inc.
> 42 Hangar Way
> Watsonville, CA 95076
> (831) 724-5422 tel
> (831) 724-3188 fax
> frank at compostlab.com
> www.compostlab.com
>
>
> -----Original Message-----
> From: stoves-bounces at lists.bioenergylists.org
> [mailto:stoves-bounces at lists.bioenergylists.org] On Behalf Of Crispin
> Pemberton-Pigott
> Sent: Wednesday, October 12, 2011 8:19 AM
> To: rajan_jiby at dataone.in; 'Discussion of biomass cooking stoves'
> Subject: Re: [Stoves] burning rice husk
>
> Dear Rajan
>
> One stove that burns whole rice hull efficiently is the Mayon Turbo Stove.
>
> Regards
> Crispin
>
>
> +++++++
>
> I do not know whether a stove can efficiently burn rice husk.
>
> But it seems rice husk can be burnt efficiently in FBC ( fluidised bed
> combustion ) boilers. There are several medium sized FBC boilers operated
> all over India. So the fuel need not go waste.
>
> Regards,
>
>
> Rajan
>
>
> _______________________________________________
> Stoves mailing list
>
> to Send a Message to the list, use the email address
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> .org
>
> for more Biomass Cooking Stoves, News and Information see our web site:
> http://www.bioenergylists.org/
>
>
>
>
>
> ------------------------------
>
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>
>
> End of Stoves Digest, Vol 14, Issue 17
> **************************************
>
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