[Stoves] Mis-information

[Kirk H.]

Dr. TLUD and all,

The video is not clear enough to state that it is down drafting and these experiments are not conclusive.  I believe the conclusions are faulty.  The hot gasses inside the stove are at a lower density, and thus in the Earths gravity, lower weight than the cooler outside atmosphere, and so are buoyant in the atmosphere, so they will rise (see attachment).  There is no force that I can see that would cause the gas to go down.  Buoyant gasses rise.  The gasses inside the fuel reactor chamber and annular space are hotter than the atmosphere, and will be pushed up by buoyancy because they are both lighter than the atmosphere.  My vote is for up-draft

Kirk H.

Sent from Mail for Windows 10

From: Paul Anderson
Sent: Wednesday, March 21, 2018 10:04 AM
To: Discussion of biomass cooking stoves
Cc: Simon Anderson - ms.k12
Subject: Re: [Stoves] Mis-information

Ron and all,

I will send a full response very soon.   Believe me, the explaation does 
not justify a new category of micro-gasifier technology, but is only 
TLUD done poorly.

Paul

Doc  /  Dr TLUD  /  Prof. Paul S. Anderson, PhD
Email:  psanders at ilstu.edu
Skype:   paultlud    Phone: +1-309-452-7072
Website:  www.drtlud.com

On 3/21/2018 9:25 AM, Ronal W. Larson wrote:
> Paul and ccs
>
> 	I believe the downward movement description is OK.  Not a TLUD, of course, despite its looks.
> I’m at a conference and will say more later.
>
> 	I know you don’t like the term TLOD, where “O” stands for opposite.  How about TLODD (for Top Lit Opposite Down Draft) - since the issue now is “down”?
>
> Ron
>
>
>> On Mar 18, 2018, at 3:32 PM, Paul Anderson <psanders at ilstu.edu> wrote:
>>
>> Stovers,
>>
>> I stumbled onto this video by accident.   He is instructing (64,000 views) that the air in the fuel chamber of a woodgas stove (same drawings as for a TLUD) are moving DOWNWARD.
>>
>> https://www.youtube.com/watch?v=FepZPaxgB3o
>>
>> Totally bogus.
>>
>> I would not even mention it to the Stoves Listserv except to express my disgust and to point how what is creeping into information flows about stoves.
>>
>> Might be a nice challenge for students to try to PROVE the direction of the air flows in TLUD stoves.   Such as an increase in temperature in the bottom few cm of the fuel if the hot gases were pulled downward.    Of detecting combustible gases in the gap between the fuel cylinder and the outer cylinder.
>>
>> Paul
>>
>> -- 
>> Doc  /  Dr TLUD  /  Prof. Paul S. Anderson, PhD
>> Email:  psanders at ilstu.edu
>> Skype:   paultlud    Phone: +1-309-452-7072
>> Website:  www.drtlud.com
>>
>>
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