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Though you maye nd up with it's head on your windshield.At least the bird will not be waiting to target your freshly waxed Tesla.
That picture is at least a few years old. As I recall, it was some student project and yeah, the idea was to recapture energy from passing traffic.These type of turbines work well as vertical axis because the wind can blow from any directions. Here it's only when blowing along the highway. What are they intending, to capture the air displaced from passing trucks?
That picture is at least a few years old. As I recall, it was some student project and yeah, the idea was to recapture energy from passing traffic.
I feel the same about this as I do about many "wouldn't that be cool" ideas (cf. Solar Trees, solar roads, power generating speedbumpbs, etc). I haven't done the engineering work, nor a proper efficiency or cost analysis, but it seems to me that you'd be better off using whatever resources you'd spend here on more conventional installations. I.e., just putting up wind turbines where the wind blows (solar panels on rooftops, etc). Once you have all the easy wind and solar, then you pursue these diminishing-returns schemes.Yeah, I see now that it came from an old (2007) article.
Highway wind turbines to capture energy from passing vehicles
Wind turbines bring a new spin to highway signs | DVICE
Perhaps vertical turbines in the center would make more sense for such an idea anyways:
I feel the same about this as I do about many "wouldn't that be cool" ideas ...
And again, I can't help but think "there's no free lunch" I suppose if a speed bump it there anyway to slow down a driver then having it create energy is a good thing but if it takes energy to push a truck down the road through the air, does not objects like turbine blades near enough to use that displaced air energy add more drag to the truck make them move?
If the presence of those turbines reduces the drag forces resulting from turbulence behind the vehicle, there's a net gain for the vehicle. In that case, this isn't a "free lunch" question... it's more about comparing it to drafting, where the vehicle behind the truck improves mileage for both of them. Drafting does seem like "free lunch" but it's all about the serious inefficiency of a single vehicle going down the road vs a train of them holding open a tunnel in the atmosphere.