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:
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