[Stoves] Lowering emissions

[Kevin Chisholm]

Dear Frank

That is a brilliantly simple way to determine surface area!!

Kevin

----- Original Message ----- 
From: "frank" <frank at compostlab.com>
To: "Discussion of biomass cooking stoves" <stoves at listserv.repp.org>
Sent: Wednesday, January 03, 2007 2:08 PM
Subject: Re: [Stoves] Lowering emissions


> Crispin and others,
>
> One way I tried was to wet wood with water and coat with #30 sand.
> Worked somewhat. I calibrated with weight of sand per unit area. Powders
> did not work.
> So I do not have a good method. I think it would be a useful measurement
> if someone can think of a good way to test it.  But think we can work
> around that with 1) particle size - void space ratio for ball or block
> shaped particles, 2) diameter of long particles (sticks) - void space
> ratio etc. The choice of the two methods to pick from could be based on
> an agreeable length to width ratio value. As you say it gets complicated!
>
> Frank
>
>
>
>
>
>
> Crispin Pemberton-Pigott wrote:
>
>>Dear Frank
>>
>>I have another question you might have some thoughts on.
>>
>>How can I measure the surface area of a selection of firewood, compared 
>>with
>>its volume?
>>
>>Your sand method will find the volume.  An important number is the ratio 
>>of
>>area to volume: M^2/M^3.
>>
>>Ideas anyone?
>>Crispin
>>
>>
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>>
>>
>>
>>
>
> -- 
> Frank Shields
> Soil Control Lab
> 42 Hangar way
> Watsonville, CA  95076
> (831) 724-5422 tel
> (831) 724-3188 fax
> frank at compostlab.com
> www.compostlab.com
>
>
>
>
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