[Stoves] Stoves Digest, Vol 18, Issue 6

Wed Dec 5 15:37:11 EST 2007

Please find my email for your mail list:
delebabatola at yahoo.com

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> Today's Topics:
> 
>    1. Re: Find truth about Re:  Turbo-Cocina,
> turbo-cooker Wins
>       Prize for Clean Burning (Nikolaus Foidl)
>    2. Re: Tip from a Potter (Craig Gallien)
>    3. Re: Hand Crank Dynamo for Fanned Stove? (Niels
> Petersen)
>    4. Re: Hand Crank Dynamo for Fanned Stove? (Niels
> Petersen)
>    5. Re: [Gasification] Find truth about Re: 
> Turbo-Cocina,
>       turbo-cooker Wins	Prize for Clean Burning
> (Kevin Chisholm)
>    6. Re: Hand Crank Dynamo for Fanned Stove?
> (Robert Penn Taylor)
>    7. HEDON newsletter (21/11/2007) (Raffaella
> Bellanca)
> 
> 
>
----------------------------------------------------------------------
> 
> Message: 1
> Date: Tue, 04 Dec 2007 15:03:07 -0600
> From: Nikolaus Foidl <nfoidl at desa.com.bo>
> Subject: Re: [Stoves] Find truth about Re: 
> Turbo-Cocina, turbo-cooker
> 	Wins Prize for Clean Burning
> To: Discussion of biomass cooking stoves
> <stoves at listserv.repp.org>
> Message-ID: <C37B1CAB.233C%nfoidl at desa.com.bo>
> Content-Type: text/plain;	charset="US-ASCII"
> 
> Dear Andrew!
> 
> The claims to save 98 % of energy is widely
> overstated, from viewing the
> stove work I estimated in a short calculation taking
> in account the quantity
> of woodchips and the quantity of water heated, an
> efficiency in the range of
> 30 to 35 % and that's average for me comparing it to
> other gasifier stoves I
> have build myself and as well I have seen working.
> As usual some reporter
> who has not a clue why somebody got a price hurries
> to invent a nice
> interesting story to sell an article. That's it.
> That Salvador coming out of
> a terrible civil war with lot of death and hatred
> desperately needed heroes
> to get hope again even was misunderstood by the "
> inventor" himself.( he
> still beliefs that he is an inventor and genius)
> Same happened with lady
> Menchu in Guatemala. If you look at the drawings in
> his patent you
> immediately see the limitations, for being a good
> gasifier, you can not load
> fines like sawdust because the horizontal flow would
> be stopped , you can
> not load more then a few centimeters of gasify able
> material otherwise you
> block as well the up words directed air, diameter of
> the gasifyer is as well
> limited otherwise the air causes burning only the
> outside and the center of
> the accumulated wood waste.( chips and sawdust etc.)
> Wood needs to be bone
> dry otherwise wet smoke and air mixture leads not to
> a burnable mixture. No
> defined flame zone and gasification zone, as long
> the air is blowing out the
> flames you have pyrolisis, if the velocity of the
> air stream towards the
> wood chips is too low then you have simple burning.(
> too much oxygen at the
> surface of the woodchips).
> Best regards Nikolaus
> 
> 
> On 12/4/07 2:36 PM, "acparker at xmission.com"
> <acparker at xmission.com> wrote:
> 
> > Nikolaus,
> > 
> > I agree.  Try reviewing some of the pharmaceutical
> patents to see how
> > broadly a patent can be written and accepted.
> > 
> > Being understaffed, I believe the patent office
> has a tendency to stamp
> > it and let people fight it out in the courts.
> > 
> > 
> > Andrew Parker
> > 
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> 
> 
> ------------------------------
> 
> Message: 2
> Date: Wed, 5 Dec 2007 11:09:59 -0800
> From: "Craig Gallien" <craiggallien at slingshot.co.nz>
> Subject: Re: [Stoves] Tip from a Potter
> To: "Discussion of biomass cooking stoves"
> <stoves at listserv.repp.org>
> Message-ID:
> <000a01c83772$6e37a8c0$0201a8c0 at acer2bd4233e2b>
> Content-Type: text/plain; format=flowed;
> charset="iso-8859-1";
> 	reply-type=original
> 
> If you want to try some experiments, try adding
> sawdust , cowdung, paper 
> pulp, glass fibre, wire wool, rock wool, ceramic
> fibre, to the clay you have 
> available to increase tensile strength and
> resistance to thermal shock. Fire 
> in a kiln slowly before putting in stove , if it
> explodes you fired too fast 
> or it wasnt dry enough.
> Good luck
> Craig
> 
> 
> ----- Original Message ----- 
> From: "Charlie Sellers" <csellers42 at yahoo.com>
> To: "Discussion of biomass cooking stoves"
> <stoves at listserv.repp.org>
> Sent: Monday, December 03, 2007 11:43 PM
> Subject: Re: [Stoves] Tip from a Potter
> 
> 
> > Great!  I couldn't find the original post about
> coating metal, but I am 
> > very interested in replacing metal grates with
> clay ones (Darfur and other 
> > locations), to reduce costs and increase lifetime.
> >
> > Does anyone has data on clay grates - rolled clay
> with holes?  How thick? 
> > I can start by drilling holes in clay tiles
> (baldosa?).
> >
> > Crispin, do you need a Pyrex grate for testing - I
> have a very reasonable 
> > local borosilicate glass workshop here?  Bring to
> you at ETHOS?
> >
> > Charlie
> >
> >
> >
> > Craig Gallien <craiggallien at slingshot.co.nz>
> wrote: If you have trouble 
> > with the durability of the parts of your stove ,
> > particularly the grate, try coating the metal part
> in liquid clay.
> >
> > I use casting slip ( a mixture of clay, water, and
> a defloculant) to coat
> > the vertical grate of my sawdust gasifier and it
> has increased its life 
> > from
> > a week to 2 months and counting. The grate is made
> from element wire from
> > old electric heaters that is then woven into a
> mesh with a gap size of 
> > about
> > 1cm square.
> >
> 
=== message truncated ===


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