[Stoves] Servals natural draft wood stove
rajan_jiby at dataone.in
rajan_jiby at dataone.in
Thu Jul 19 23:49:08 CDT 2012
Dear Crispin,
Comments below.
Regards,
Rajan
>
> Message: 3
> Date: Thu, 19 Jul 2012 12:28:52 -0400
> From: "Crispin Pemberton-Pigott" <crispinpigott at gmail.com>
> To: "'Discussion of biomass cooking stoves'"
> <stoves at lists.bioenergylists.org>
> Subject: Re: [Stoves] Servals natural draft wood stove
> Message-ID: <04c801cd65cb$98aa8190$c9ff84b0$@gmail.com>
> Content-Type: text/plain; charset="us-ascii"
>
> Nice work Rajan
>
>
>
> I recognise a couple of parts from other devices in there. The black pot
> rest looks like it comes from a paraffin stove and the round thing under
> it
> looks like.well sort of like a jelly mould made from stainless steel.
They are standard items from the market. Easy to replace if and when
required.
>
>
>
> I am glad to hear you have put in a grate because excessive charcoal
> production lowers efficiency. You should also get a cleaner burn in terms
> of
> emissions per kg of fuel put into the stove.
The grate greatly helps.
>
>
>
> I am glad to see also the pot skirt making a seal at the bottom edge. This
> adds to the draft. If you limit the air getting into the fuel hole (with a
> drop-down plate) you can get an increase in the flame temperature by
> limiting unneeded excess air. Have you tried it? When you add vertical
> height it usually pays to limit the air entrance cross section.
The fuel-wood stand is height-adjustable. One of the purposes here is to
reduce/regulate the excess air - also encouraging air-flow at the bottom
of the stand. The opening at the "flame concentrator" ( just below the
vessel support ) is also tuned for 2 KW fire-power.
I have been toying with the idea of a drop plate also. But I am worried
whether the user will find it convenient.
The pot-skirt is height adjustable ( 20 mm to 90 mm ) for various cooking
appliances. Ten different heights are possible - 5 in one direction and
another 5 by reversing the pot-skirt.
The stove boils 3 kgs water in 18 minutes using around 200 grams of firewood
( ambient temperature around 33 C ).
>
>
>
> Of course everyone will like the BA surface material!
>
>
>
> How much does it weigh?
The dry weight of the stove is around 7 kgs.
>
> How much does it cost, say per 100?
This of course, Servals has to say. I feel pricing is moderate.
>
>
>
> Regards
> Crispin
>
>
>
> +++++++
>
>
>
> Dear All,
>
>
>
> Servals wood stove is shown at the following link.
>
>
>
> This is a low-smoke stove with a rated fire-power of 2 KW.
>
>
>
>
> http://servalsgroup.blogspot.in/2012/01/servals-modified-natural-draft-wood.
> html
>
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