[Stoves] Charcoal as space filler in TLUD reactors

[Josh Kearns]

I just got a bunch of (spherical) cherry pits I'm going to try soon. Let me
know if you are interested in the results....


On Tue, May 7, 2013 at 4:57 PM, <rongretlarson at comcast.net> wrote:

> Frank and list:
>
>      Need to bring in one more variable: fuel shape.  Imagine the fuel is
> pencil shaped.  If placed vertically, they work fine to make char.  If
> horizontal and parallel, they can block most vertical air flow.  Anyone
> able to supply biomass fuel spheres?
>
> Ron
>
> ------------------------------
> *From: *"Frank Shields" <frank at compostlab.com>
> *To: *"Discussion of biomass cooking stoves" <
> stoves at lists.bioenergylists.org>
> *Sent: *Tuesday, May 7, 2013 2:46:13 PM
>
> *Subject: *Re: [Stoves] Charcoal as space filler in TLUD reactors
>
> Dear Martin,
>
> I often determine the particle density here in the lab using free flowing
> sand. If the particle density of the fuel is determined (g/cc) and you know
> the weight of fuel packed in a known volume you know the volume of voids
> and
> can determine the air speed - I am thinking.
>
> Frank
>
>
>
>
> -----Original Message-----
> From: Stoves [mailto:stoves-bounces at lists.bioenergylists.org] On Behalf Of
> ajheggie at gmail.com
> Sent: Tuesday, May 07, 2013 1:26 PM
> To: Discussion of biomass cooking stoves
> Subject: Re: [Stoves] Charcoal as space filler in TLUD reactors
>
> [Default] On Tue, 7 May 2013 09:22:19 +0200,"Boll, Martin Dr."
> <boll.bn at t-online.de> wrote:
>
> >You have to calculate the free space in order to get the real air-speed in
> this area.
> >I think even if that is naturally not the true surface-speed on the fuel,
> it is a good number to deal with.
>
> I think in gasification they use the term "superficial velocity" a
> fictional
> speed derived from the air volume and cross section of the chamber, the
> actual speed of any given bit of air flow through the spaces will be much
> higher of course.
>
> AJH
>
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-- 
Josh Kearns
PhD Candidate, Environmental Engineering
University of Colorado-Boulder
Visiting Researcher, North Carolina State University

Director of Science
Aqueous Solutions
www.aqsolutions.org

Mobile: 720 989 3959
Skype: joshkearns
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