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Old 12-06-2018, 05:09 PM   #11 (permalink)
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I believe I read somewhere the air speed close to the radiator is 1/6th of the velocity of the vehicle. Which, if true, means that the energy that could be derived of that fan is 1/6^3 of what it could have been in full wind.
Which is as close to nothing as anything; it would be a real challenge to harvest more than a few milliWatt out of that.

One could stick a row of TEGs to the radiator with a copper strip on the back and harvest a few Watt from the Seebeck effect. That in comparison would be way less uneffective.

I've been thinking about a micro turbine on the air intake to harvest energy from the vacuum draw on partial load, only to find no suitable turbines and generators for such a tiny draw exist. There's a potential of several hundred Watt there, but even that proved to be elusive.

I wish I could have given off a happier signal.

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Old 12-08-2018, 10:36 AM   #12 (permalink)
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Interesting idea. On a gasoline powered engine, some of the restriction of the throttle body can be performed by the fan generator.
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Old 12-08-2018, 02:42 PM   #13 (permalink)
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I believe I read somewhere the air speed close to the radiator is 1/6th of the velocity of the vehicle. Which, if true, means that....
I can't confirm that, but it's been said that the opening of a properly ducted shroud should be 1/6th the area of the radiator itself.

One could perform a test with an electric fan, but before or after the radiator it would be like trying to breath with a pillow on your face.


Cold hearted orb that rules the night, Removes the colours from our sight, Red is grey and yellow white, But we decide which is right, And which is an illusion.
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