A first stab would be to use an LM3224. It is way overkill as far as current capacity
On Thu, Aug 30, 2012 at 12:25 PM, Crispin Pemberton-Pigott < [email protected]> wrote: > Dear Phil > > > > That was valuable info. The problem is not so much the volume of air > needed, it is the pressure required to force some air through the fuel to > maintain a pyrolysing bed. > > > > If you could stack fans running at a lower speed, it might give you the > pressure. You sometimes see that on high end computer cases. The fans > already have holes to allow this, it is so common. > > > > But it is probably better to use a lower voltage fan that is running at > the right tip speed for its blade density. > > > > During an earlier discussion on fans a few years ago we pointed out that a > squirrel cage fan is better for stoves because it so easily provides the > pressure needed. > > > > Do you have access to a DC-DC inverter chip to get the voltage up to 5? > > > > Regards > > Crispin > > > > > > Amazing as it may seem, this off-grid Nicaraguan resident has some of > those fans. So, I just gave one a test run. > > It starts rotating at 3.22V but the speed is very slow at anything less > than 4V. Even at 4V I would guess 25% or less of the air flow that you get > at 5V. So, it is possible to use one but not directly from a single LiIon > cell. > > On Thu, Aug 30, 2012 at 9:42 AM, Phil Hughes <[email protected]> wrote: > > > > > _______________________________________________ > Stoves mailing list > > to Send a Message to the list, use the email address > [email protected] > > to UNSUBSCRIBE or Change your List Settings use the web page > > http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org > > for more Biomass Cooking Stoves, News and Information see our web site: > http://www.bioenergylists.org/ > > > -- Phil Hughes [email protected]
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