[Stoves] ***SPAM*** Re: [tluds] update on the TLUD

[Harris, Kirk]

Ron,

Thank you for responding.

-The power level I did this test at was the highest power level the 
stove can reach without smoking.  It is forced air primary, and the 
stove in the video is natural draft.  My natural draft power level would 
probably be similar to his, but without smoke or soot.  I am using 
pellets, which could be considered a denser fuel, energy wise.  The 
forced air primary flame must be brought up to power slowly, to heat the 
stove, or it will smoke during the transition.

-The natural draft makes charcoal.  The forced air primary does as well 
but the higher power levels tend to burn char.  There must be a lot of 
air that gets past the migratory pyrolysis front and into the char.

-I will test a standard pot for you.

-I don't know the cost of commercial skirts.  Aprovecho can tell you.

-My experiments with TLUDs have lead me to 4 basic principles for mixing 
in a TLUD:

1.  The surface contact between the gasses should be maximized: 
Turbulence provides this and so does spreading the flame with a bluff body.

2.  Depth of penetration should be minimized:  Turbulence does this and 
so does spreading the flame with a bluff body

3.  Diffusion:  Works in Turbulence and also when spreading the flame 
with a bluff body

4.  Pressure difference between the gasses, which pushes the gasses 
together:  Turbulence wastes most of the pressure difference, spreading 
the flame with a bluff body maximizes the use of the pressure difference.

This is a major reason why the stove can burn as clean as it does, it 
effectively increases and uses the pressure difference between the gasses.

Kirk H.


On 3/26/2021 7:27 AM, Ron Larson wrote:
> Kirk and list:
>
> At
> https://www.youtube.com/watch?v=I0_R9Tfvs4w 
> <https://www.youtube.com/watch?v=I0_R9Tfvs4w>
> the salesperson for the stovetec superpot demonstrates boiling water 
> in 15-17 minutes using 4 sticks.   Can you add anything about the 
> comparison with your 7.5 minutes.  You of course had much higher power 
> level - but he could have also.
>
> He had a nice amount of charcoal left. - too bad he didn’t report on 
> the amount .  Can you add anything on your char production, with your
>
> The super pot shows the value of a skirt.  Can you add more about how 
> much faster the boil occurred with the super pot and your 5’ of pellets?
>
> Can you gin uo a low cost skirt for your regular pot - and guesstimate 
> the cost and energy savings?
>
>
> Below your message  below on the 24th is another important message on 
> the 23rd to this list just on pressure issues with your stove.  That 
> duplicated a message on the stove list on the 20th.   Therefore I 
> am sending this message also to the stoves list and will add a few 
> comments later today on those two messages.
>  I consider them very important because they talk about pressure 
> differences - which we can learn a lot from and I think this may be 
> the first such report..
>
> Ron
>
>
>> On Mar 24, 2021, at 8:19 PM, Kirk Harris <gkharris316 at comcast.net 
>> <mailto:gkharris316 at comcast.net>> wrote:
>>
>> All,
>>
>> Today I tested the stove with high-power forced primary air.  The 5 
>> inch fuel reactor chamber, with aprox. 5" height of soft wood 
>> pellets, brought 5 liters of water to a rolling boil, in a standard 
>> SSM Super Pot without the lid, from 16 degrees C, in 7.5 minutes.  
>> The setting was 6 on the adjustment valve as the 9 setting was to 
>> high and flames started coming out of the annulus between the 
>> combustor and fuel reactor.  The super pot does this because it 
>> creates more flow resistance than the simple pot I had been using.  
>> Then the stove was turned down to the natural draft setting of 1, 
>> where it was stable and there was no smell of hydrocarbons.
>>
>> The stove is working quite well,
>>
>> Kirk H.
>>
>> On 3/23/2021 11:11 AM, Kirk Harris wrote:
>>> All,
>>>
>>> Attached is a write-up on the stove I have been experimenting with 
>>> over the last several years.  I tried to put it on the stove 
>>> discussion list, but it was flagged as spam and so it must have 
>>> ended up in every ones spam folder.
>>>
>>> Kirk H.
>>>
>>>
>>>
>>
>> -- 
>> This email has been checked for viruses by AVG.
>> https://www.avg.com <https://www.avg.com/>
>>
>>
>>
>>
>>
>>
>
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