[Stoves] Burning saw dust in TLUD stove

[Paul S. Anderson]

Stovers,

We are delighted to have the capable assistance of Mr. Rajan Philip,  
the lead engineer at Servals Automation in Chennai, India, where the  
Champion TLUD is manufactured.

He and many others are encouraged to work on TLUDs for burning  
sawdust.  My own attempts (very limited) were not successful, so I  
will point out the main difficulty.

Forcing primary air up through the fuel in a TLUD is okay when there  
fuel particles/chunks cause the spreading of the air relatively  
uniformly across the cross-sectional area of the pyrolysis front.   
This is largely true even when the fuel is rice husks, as has been  
well shown by Alexis Belonio.

But for saw dust, the tendency is to create channels because the air  
seeks a path of least resistance. Once a channel is open, the  
pyrolysis front is not flat, but actually is radial sideways from the  
channel(s) of the air.  The key is to avoid the creating of air  
channels.  Easier said than done.

I recommend experiments with mixtures of sawdust with other larger  
fuel pieces.

I hope to hear of efforts and successes by several Stovers.  Best wishes,

Dr. TLUD
-- 
Paul S. Anderson, PhD
Known to some as:  Dr. TLUD    Doc    Professor
Phone (USA): 309-452-7072   SKYPE: paultlud   Email: psanders at ilstu.edu



Quoting rajan_jiby at dataone.in:

>
>>
>> Message: 4
>> Date: Sun, 16 Jan 2011 23:30:30 -0500
>> From: "Crispin Pemberton-Pigott" <crispinpigott at gmail.com>
>> To: "'Discussion of biomass cooking stoves'"
>> <stoves at lists.bioenergylists.org>
>> Subject: Re: [Stoves] old patent-paper about a saw-dust stoves
>> Message-ID: <01fd01cbb5ff$47fe7ee0$d7fb7ca0$@gmail.com>
>> Content-Type: text/plain; charset="us-ascii"
>>
>>
>> Has anyone seen sawdust burning stoves that seems to work reasonably well,
>> or are they all plagued by rising thermal power, for example? I am hoping
>> that some form of TLUD will work with really small sawdust particles because
>> there is so much of it around.
>>
>
> This should not be a problem with Champion TLUD stove - since this  
> stove has a provision for attaching a blower for the primary air.
>
> A blower will be definitely needed to push the primary air through  
> the saw dust.
>
> A fine mesh can be added above the regular SS mesh ( below the fuel  
> bed ) - so that fine particles do not fall through.
>
> Regards,
>
>
> Rajan
>
>
>



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