[Stoves] NDTLUD Basics

[peeters frans]

Dear Neil,

You can endless discus the parameters !
The surface or the flux versus the attenuation .
With a perforated bandage you regulate till a nice inward flame.
    I started a 40 liter expansion vessel from   water radiators ,scalped 20
cm and 30 holes up and 30 down of 8 mm . 5 cm from top and bottom .
Diam 32 cm  L 40 cm.   
Twigs fuel. 7m chimney
No charcoal wanted .
Mind ash clogging airinlet.

Regards
Frans

-----Oorspronkelijk bericht-----
Van: Stoves [mailto:stoves-bounces at lists.bioenergylists.org] Namens
neiltm at uwclub.net
Verzonden: vrijdag 14 september 2018 13:55
Aan: stoves at lists.bioenergylists.org
Onderwerp: [Stoves] NDTLUD Basics

Could someone please point me to where I can find information about how to
calculate hole sizes, number and ratio between primary and secondary air
holes in  conventional tincanium NDTLUD stoves?

I can do the maths based on calculating area of a hole from the drill size
diameter, and my measurements of Tom Reed woodgas campstoves told me if I
remember correctly that the air ratio there was about 1 primary to 6
secondary, but is there also any recommendation with a ND stove as to the
volume of primary and/or secondary air in relation to the burn chamber
diameter and possibly depth?

I realise that these ratios are adjusted to suit the fuel, moisture content
heat requirement etc, but wondered if there were guidelines based on close
to zero moisture wood?  After a lot of interesting experimentation with the
cheap chinese NDTLUDs and a variety of fuels and conditions, and another
month spent happily relying on them in Scotland this year, now we are home I
want to see if I can reliably burn my stovetop dried wood in a larger home
made stove and pass Paal Wendelbo's 'does it make my eyes sting?' test.
This morning's breakfast, while a clean looking smokeless flame didn't.

Thanks,

Neil Taylor

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