[Gasification] tests to design a new cheap gasifier fan

[Greg Manning]

 Greetings Jim, and list members.

 Jim, if you want a better fan, (and cheaper), simply make 2 disks (one
mounts on the shaft, the other has the larger hole for the inlet.)

 then use strips of heavy tin (or light gauge metal) and form them into a Z
shape (well, an L with a dog leg the other end, and the opposite way,
somewhat like a "90 degree Z")

 take these and pop rivet with STEEL rivets (NOT aluminum ones) so they are
sandwiched between the two disks in a radial fashion (like your welded
version on your site, BUT with the extra disk on the inlet side of things.

 the extra disk should run as close as it can to the outer housing the
Bernoulli principal will help stabilize the outer disk, and the outer disk
will add about 25% more suction to the unit for the same RPM (therefore the
entire unit could be built smaller and lighter).

Greg Manning,
Canadian Gasifier Ltd.
Building Hi-Performance Gasifiers, Since 2001

Brandon, Manitoba, Canada
1 (204) 726-1851



-----Original Message-----
From: gasification-bounces at lists.bioenergylists.org
[mailto:gasification-bounces at lists.bioenergylists.org]On Behalf Of jim
mason
Sent: Saturday, October 02, 2010 4:58 PM
To: gasification at bioenergylists.org
Subject: [Gasification] tests to design a new cheap gasifier fan


we've been doing some work lately to design a new fan/blower that will
produce the needed vac and heat tolerance for gasifier operation.  as
we all know, there is not an inexpensive source for such a thing from
other industries and applications.  thus we had to build one for the
early gek kits.

the original gek fan proved to not be strong enough once we finally
characterized the vac numbers that produce the flow/heat rates that
correspond to full tar conversion.  the ejector/venturi solution we're
using currently produces plenty of vac and is very flexible, but
requires compressed air.  this is not good for many off grid
situations.  thus we still need a good fan/blower source.  and one
that works on 12vdc, not an ac source.

here's the info an pictures of our recent tests to produce this.  we
are working towards a much simplified solution that also gets rid of
the welding to make it.  this is based on the common car/truck fasco
type fan motor.

http://gekgasifier.com/forums/showthread.php?t=455

jim



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Jim Mason
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