[Stoves] Surface area measurement of fuel

[frank]

Tom and stovers,

Tom Miles wrote:

>Frank,
>
>You could use a wax to seal the wood. Light wax is used to seal wood to
>prevent excessive drying at the ends (called end checking)due to evaporation
>of mositure out the ends.   
>
>Tom
>
>  
>
What I did was take a square 10 cm X 10 cm. Wet it with a damp cloth and 
press it into #30 mesh sand.  Then let it dry  and brush off the sand to 
weigh and calculate grams sand per square cm.  Then wet the woodchips 
and coated them with sand and did the same thing. It worked well except 
I think the sand cover could have been more consistant. 

Frank



>-----Original Message-----
>From: stoves-bounces at listserv.repp.org
>[mailto:stoves-bounces at listserv.repp.org] On Behalf Of frank
>Sent: Wednesday, January 03, 2007 2:57 PM
>Cc: Discussion of biomass cooking stoves
>Subject: Re: [Stoves] Lowering emissions
>
>Dear Kevin and all,
>
>Brilliant? Thanks. It worked ok but we need to add something to the water to
>make it more sticky, or perhaps spray something onto the wood. 
>The sand needs to stick more evenly. I moved on to other projects before
>really working this out.
>
>But I now vote for Crispins direction with some sort of size measurement.
>The size info should be done anyways as it will be useful info to describe
>the fuel. So if we can eliminate the sand (or any other
>test) that would be nice.  As much as I love testing - the fewer and simpler
>the better.
>
>Frank
>
>
>
>
>Kevin Chisholm wrote:
>
>  
>
>>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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>>>      
>>>
>>
>>
>>
>>    
>>
>
>--
>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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>
>
>
>
>
>  
>

-- 
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