Crispin and Alex and all,
Successful "dribble" or "trickle" feeding at very low cost will be a
great addition to small stove technology.
Of course gravity is the least expensive. But "assisted gravity" might
be relatively low cost. I am thinking of a small tapper or vibrator
that can be set to giggle the fuel chamber periodically or when some
sensor sends a signal.
Alternatively there could be some shape of rod that is inside the fuel
chamber. There are many ways to giggle/wiggle/twist/tap/lift/drop to
have minor movement of the rod to assure the gravity flow of the fuel in
the hopper.
Alex is doing it the right way: Start with uniform fuels like pellets
or quality (screened) wood chips. When a method works there, then
start looking at the more difficult fuels to make flow.
Paul
Paul S. Anderson, PhD aka "Dr TLUD"
Email: [email protected] Skype: paultlud Phone: +1-309-452-7072
Website: www.drtlud.com
On 10/22/2012 7:48 PM, Crispin Pemberton-Pigott wrote:
Dear Paul
Not too fast there... that is what is exciting about Alex English's
dribble feeder (I am calling it because that is what it is doing). He
is successful so far with wood chips, pellets and by extension, any
small fuel like nut shells, coffee hulls etc.
I am going to have a gander in November. It is the first /small/
gravity feeder that I have seen work well. There is no reason it won't
work with rice hull if we get a bit clever.
You fan (geddit)
Crispin
*++++++*
It is the words "feed ... continuously" fuel that is a problem. The
pellet stoves (heaters) are acceptable and successful because the
continuous feeding of fuel is automated. No such luxury with
inexpensive stoves for economically poor people.
Paul
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