[Stoves] Charcoal as space filler in TLUD reactors

rongretlarson at comcast.net rongretlarson at comcast.net
Tue May 7 23:03:52 CDT 2013


Kevin: 

I don't recall saying I need any spherical biomass. But any size, and specification, and amount you have will find a needy biochar home. What have you got for us? 

Ron 


----- Original Message -----
From: "Kevin" <kchisholm at ca.inter.net> 
To: "Discussion of biomass cooking stoves" <stoves at lists.bioenergylists.org> 
Sent: Tuesday, May 7, 2013 4:35:55 PM 
Subject: Re: [Stoves] Charcoal as space filler in TLUD reactors 

 
Dear Ron 


----- Original Message ----- 
From: rongretlarson at comcast.net 
To: Discussion of biomass cooking stoves ; Frank Shields 
Sent: Tuesday, May 07, 2013 5:57 PM 
Subject: Re: [Stoves] Charcoal as space filler in TLUD reactors 


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? 

# What diameter do you want? What material? Do you have a complete specification? How many tonnes do you want? How much are you willing to pay per tonne? 

Kevin 

Ron 


----- Original Message -----

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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