[Stoves] Malot-blower, answer to Paul Anderson

[Boll, Martin Dr.]

Paul,
The rotor was built with simplest stuff. Just to show how simple you can
achieve a fan-rotor if you use the 7-circle-geometry, (one in centre six
round that centre) to press/fix simply the double-wings onto the shaft.
Instead of the round sticks you can use half-tubes as well. The simple
geometry stays the same.
You mentioned squirrels-cage-fans. Because of my technical simplicity I had
to look for that, and found by Wikipedia, that such fans work as well as
radial-blowers, but do not make much pressure. So, I think my low tech
experiment has more or less the right geometry to start from and develop
from that further. Especially, if the gained pressure would be too low,
there is always the possibility to add a second stage onto the same shaft.
You always get the blow from the periphery. If you want 
1. tangential from both sides, or 
2. in axial direction (naturally nearby the shaft the centre is closed to
avoid recirculation)
Possibly the second is the best solution, because the air-stream has more or
less the same direction.

Regards

Martin

 P.S.
-For some other readers than Paul (A.): 
Please don't hesitate to use commercial electrical fans, if you like them,
have the money and the shop by hand. Naturally, I know, they work far better
than my Malot-blower. 
It is just to see that it is possible "to make my own fishing-line"
Excuse me for annoying you with technical simplicity-


> Message: 7
> Date: Mon, 09 Jul 2007 23:28:13 -0500
> From: "Paul S. Anderson" <psanders at ilstu.edu>
> Subject: Re: [Stoves] Malot-blower
> To: Discussion of biomass cooking stoves <stoves at listserv.repp.org>,
> 	Jeff	Davis <jeff0124 at velocity.net>
> Message-ID: <20070709232813.izrqoroqas0kw8cw at webmail2.ilstu.edu>
> Content-Type: text/plain;	charset=ISO-8859-1;	format="flowed"
> 
> Martin, Jeff and all,
> 
> Do we have any photos of a completed unit?  I assume that the axel and
> fins need
> some housing, like in the squirrel cage blowers.  How big is the air
> outlet?
> 
> Any more info about the amount of air flow?  And can it be scaled up in
> size? How much?
> 
> These radial blowers (squirrel cage type) all seem to have fins at the
> outer
> edges and to have an empty central area.  All except the Malot blower.
> Because the air must enter into the center of the device and then be
> propelled
> outward, a blocked / occupied center might mean less air flow.
> 
> Paul
> --
> Paul S. Anderson, Ph.D., Geography professor - Emeritus
> Telephone:  USA-309-452-7072 (residence and office)
> Internet site:  www.ilstu.edu/~psanders
> For my gasifier stoves info, go to:
> http://bioenergylists.org/contributors#Paul_Anderson
>