[Stoves] corn cobs and char?

[Paul Olivier]

Kevin,

I think that I am aware of this.

Paul


On Wed, Aug 14, 2013 at 6:36 AM, Kevin <kchisholm at ca.inter.net> wrote:

> **
> Dear Paul
>
> I guess that what I was trying to suggest in a simple way is that you are
> not dealing with a simple problem. What you are dealing with is
> "3 dimensional unsteady state heat transfer through beds of irregularly
> sized  broken solids, with irregular shape factors, changing size, and
> changing state."
>
> Best wishes,
>
> Kevin
>
> ----- Original Message -----
> *From:* Paul Olivier <paul.olivier at esrla.com>
> *To:* Discussion of biomass cooking stoves<stoves at lists.bioenergylists.org>
> *Sent:* Tuesday, August 13, 2013 7:40 PM
> *Subject:* Re: [Stoves] corn cobs and char?
>
>   Kevin,
>
> Note that I used the phrase "sufficiently uniform". I have experimented
> with several forms of loose biomass in no way as uniform as rice hulls,
> such as coffee husks. Some work quite nicely.
>
> But I would not venture a guess about the wooden spheres you describe.
> I like to see a certain resistance to air or gas flow.
> We can't say much until we run tests.
>
> Thanks.
> Paul
>
>
> On Wed, Aug 14, 2013 at 5:04 AM, Kevin <kchisholm at ca.inter.net> wrote:
>
>> **
>> Dear Paul
>>
>>  ----- Original Message -----
>> *From:* Paul Olivier <paul.olivier at esrla.com>
>> *To:* Discussion of biomass cooking stoves<stoves at lists.bioenergylists.org>
>> *Sent:* Tuesday, August 13, 2013 6:38 PM
>> *Subject:* Re: [Stoves] corn cobs and char?
>>
>>   Ron,
>>
>> In a TLUD it's all about the uniformity of air flow.
>> If corn cobs were cut to the same length, they just might be sufficiently
>> uniform.
>>
>> # I think it is a bit more complex that "unifiorm length." With a given
>> species of fuel, I think it is more a relation of relative size (that would
>> determine pressure drop and uniformity of flow across the fuel bed), and
>> surface area and diameter of the fuel particle. (That will have a large
>> impact on fuel burning characteristics.)
>>
>> For example, consider a TLUD running on wood spheres of say 1/4"
>> daimeter, and 1" diameter. Such stoves would have quite different operating
>> characteristics.
>>
>> Best wishes,
>>
>> Kevin
>>
>>
>>
>>
>> Thanks.
>>
>> Paul Olivier
>>
>>
>> On Wed, Aug 14, 2013 at 1:54 AM, Ronal W. Larson <
>> rongretlarson at comcast.net> wrote:
>>
>>> List:
>>>
>>>    Anyone have any data on using corn cobs in char-making stoves?  The
>>> supply would seem to be large and likely low cost..
>>>
>>> Ron
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>>
>>
>> --
>> Paul A. Olivier PhD
>> 26/5 Phu Dong Thien Vuong
>> Dalat
>> Vietnam
>>
>> Louisiana telephone: 1-337-447-4124 (rings Vietnam)
>> Mobile: 090-694-1573 (in Vietnam)
>> Skype address: Xpolivier
>> http://www.esrla.com/
>>
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>
>
> --
> Paul A. Olivier PhD
> 26/5 Phu Dong Thien Vuong
> Dalat
> Vietnam
>
> Louisiana telephone: 1-337-447-4124 (rings Vietnam)
> Mobile: 090-694-1573 (in Vietnam)
> Skype address: Xpolivier
> http://www.esrla.com/
>
> ------------------------------
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>
>


-- 
Paul A. Olivier PhD
26/5 Phu Dong Thien Vuong
Dalat
Vietnam

Louisiana telephone: 1-337-447-4124 (rings Vietnam)
Mobile: 090-694-1573 (in Vietnam)
Skype address: Xpolivier
http://www.esrla.com/
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