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, <[email protected]> wrote: > Send Stoves mailing list submissions to > [email protected] > > To subscribe or unsubscribe via the World Wide Web, visit > > http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org > > or, via email, send a message with subject or body 'help' to > [email protected] > > You can reach the person managing the list at > [email protected] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Stoves digest..." > > > Today's Topics: > > 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" <[email protected]> > To: "'Discussion of biomass cooking stoves'" > <[email protected]> > Subject: Re: [Stoves] burning rice husk > Message-ID: <[email protected]> > 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 > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20111012/ae795c21/attachment-0001.html > > > > ------------------------------ > > Message: 2 > Date: Wed, 12 Oct 2011 11:19:02 -0400 > From: "Crispin Pemberton-Pigott" <[email protected]> > To: <[email protected]>, "'Discussion of biomass cooking stoves'" > <[email protected]> > Subject: Re: [Stoves] burning rice husk > Message-ID: <[email protected]> > 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 <[email protected]> > To: Discussion of biomass cooking stoves > <[email protected]> > Subject: Re: [Stoves] burning rice husk > Message-ID: <[email protected]> > 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 > > [email protected] > > > > to UNSUBSCRIBE or Change your List Settings use the web page > > > http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org > > > > for more Biomass Cooking Stoves, News and Information see our web > > site: > > http://www.bioenergylists.org/ > > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20111012/702a38b7/attachment-0001.html > > > > ------------------------------ > > Message: 4 > Date: Wed, 12 Oct 2011 09:27:59 -0700 > From: "Frank Shields" <[email protected]> > To: "'Discussion of biomass cooking stoves'" > <[email protected]>, <[email protected]> > Subject: Re: [Stoves] burning rice husk > Message-ID: <[email protected]> > 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 > [email protected] > www.compostlab.com > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Crispin > Pemberton-Pigott > Sent: Wednesday, October 12, 2011 8:19 AM > To: [email protected]; '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 > [email protected] > > to UNSUBSCRIBE or Change your List Settings use the web page > > http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists > .org > > for more Biomass Cooking Stoves, News and Information see our web site: > http://www.bioenergylists.org/ > > > > > > ------------------------------ > > _______________________________________________ > Stoves mailing list > > to Send a Message to the list, use the email address > [email protected] > > to UNSUBSCRIBE or Change your List Settings use the web page > > http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org > > > for more Biomass Cooking Stoves, News and Information see our web site: > http://www.bioenergylists.org/ > > > End of Stoves Digest, Vol 14, Issue 17 > ************************************** >
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