Fw: Tin Can Stove

["John Davies" <jmdavies@xsinet.co.za>]

> Hi All,
>
> After several mails' to the gasification site, this is my first to the
> stoves site. Subsequent to my last report, which may or may not have
reached
> the stoves site.
>
> Lighting of the stove has been greatly improved by increasing the primary
> air holes from 8 to 16.
>
> The Flame at the burner has been further improved by doubling the length
of
> the mixing zone under the burner.
> This has produced an almost perfect flame, of even spread and height.
Short
> and blue with yellow tails with a height of about 3", sticking to the
burner
> surface and very hot.      This has come at a price, a stable flame is
only
> achieved where the gas volume is in a very narrow band, any change to the
> primary air resulted in a flame out. More primary air was needed but the
> flame duration was still about 25minutes. The charcoal produced was less.
It
> is suspected that some was reduced to gas during the first stage. This
might
> explain the dramatic increase in heat, with the same duration burn.
>
> A flame at the burner was still not achieved during the charcoal burn. I
am
> sure that persistence would pay off, but it is now time to divert my
> experiments to the cross draft " Institutional Stove " .  This direction
is
> in order to try and produce another tin can stove, with continuous heat
> output and a gas of constant quality and volume which will better suit a
> finely tuned burner.
>
> The next stove will require more thought and effort as horizontal pipes
will
> have to be joined to the combustion can. The requirement would be that the
> stove be built entirely from waste, using simple hand tools.
> This will be the only way to bring this technology to the poorest of the
> poor, which in turn could create jobs in that community and clean up the
> thick environmental smog in which they live, from the improper burning of
> low grade coal, which is their only affordable source of heating.
>
> Any ideas for this type of construction will be welcome.
>
> Regards,
> John Davies.
> Secunda.
> South Africa.
>
> PS. The stove sketch can be seen at :
> http://www.geocities.com/kenboak/index.html
> Thanks to Ken Boak who has kindly added it to his personal web site.
>
>
>



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