[Stoves] Charcoal as space filler in TLUD reactors

[Frank Shields]

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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