At 06:11 PM 6/29/2008, John Herrera wrote:
>Lets' say, for simplicity, that the electric fan and the belt-driven fan move
>the same amount of air. If the fans are equally efficient (maybe this is where
>I'm off base), then the same amount of power is used to drive them. The only
>thing that has changed is that the power comes from your alternator instead of
>the crankshaft. But the alternator robs power from the crankshaft, so what do
>you gain? Also you have introduced a middleman into the sytem, which increases
>losses.
>
>What am I missing?
One part that you are missing is that the electric fan can
be turned off when it is not needed, and therefore it won't
draw power all the time. The crank mounted fan spins and
draws power whether or not it is actually needed.
R. John Lye
rjl6n@cstone.net
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