Highway wind turbines to capture energy from passing vehicles
Filed under: Emerging Technologies, Etc.

An Arizona State University student has proposed a very novel way of re-capturing some of the energy expended by vehicles moving at high speeds on our nations highways. We all know how much air turbulence is generated by vehicles moving at speed particularly trucks.
The proposal would involve mounting horizontal wind turbines above the roadway that would be driven by the moving air generated by the passing traffic. The electricity generated by spinning these turbines could be fed back into the grid. Joe's analysis indicates that based on vehicle speeds of 70 mph each turbine could produce 9,600 kWh per year.
The wind turbines shown in the proposal are of a quiet running type. Certainly in many built up areas there is enough constant traffic volume to maintain a steady airflow through much of the day. The big question that needs to be answered is whether the nature of the turbulent airflow could keep the turbines turning. If a turbine could be optimized to work in that environment it seems like it might be a very worthwhile investment. It's certainly deserving of further investigation.
[Source: Archinect.com]












Reader Comments (Page 1 of 1)
5-01-2007 @ 10:04AM
Schmeltz said...
What an awesome idea! I wish I would have thought of that. I'm being serious by the way--not sarcastic. How many of us have stood next to a busy highway at some point, and nearly get blown over by a passing truck? We should tap energy wherever we can.
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5-01-2007 @ 10:17AM
Karkus said...
Yes, this is a cool idea, and I think they're trying it in Canada too. Overall I think it could work. The only drawback I could it could reduce some of the drafting effect (especially on a busy highway), thereby reducing MPG of the cars. However, I would expect this effect to be very minor.
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5-01-2007 @ 4:03PM
1985 Gripen said...
The question I have is whether this thing would essentially be a pigeon blender.
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5-01-2007 @ 5:01PM
cdub said...
Well - anything to reduce pigeon population is good in my opinion.
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5-01-2007 @ 8:14PM
Janis Mara said...
I am so totally on board with this idea, and in passing I note that the turbine is quite attractive, too! If you've ever ridden a motorcycle on the freeway, you have certainly witnessed up close and personal the immense blowback created by trucks, cars and your own velocity. So, right on!
(BTW it is true that the turbines in Altamont Pass, Calif., in the area where I live, have killed a bunch o' birds. Pace the pigeon-haters above, I hope that doesn't happen with this one!
Janis Mara
www.ecotality.com
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5-02-2007 @ 12:20AM
Bob said...
they should install some in canada (toronto/montreal). because in winter the wind is just too powerful.
http://mininova.wordpress.com/
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5-02-2007 @ 7:14AM
TuuSaR said...
I would call that "hobby" windpower and simply not making any practical sense.
Bigger the windmill is, better the overall efficiency and of course it should be located on good windy place. In the USA you have plenty of excellent places to install massive mills worth of several megawats, no need to waste time and money on peanuts seen in that news picture.
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5-02-2007 @ 12:34PM
John Rowell said...
Sorry, you don't get something for nothing! Remember the law of conservation of matter and energy? Yeah, the one we all learned in school? The energy produced by those wind turbines will be at the expense of increased drag for the cars. We're talking reduced fuel economy. Who wants that?
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5-02-2007 @ 12:43PM
mike said...
This is an awesome idea! There are lots of instances where a simple turbine could be used to generate a lot of renuable power.
#8 Installing one of these above the road will not increase the drag experienced by cars. The displaced air is already moving as a result of the car moving through it. Its simply a matter of turning that moving air's energy into something we can use.
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5-02-2007 @ 4:44PM
Chris M said...
The problem is that the irregular gusts produced by traffic are not efficiently used by wind turbines. Windmills work best with constant winds. At most sites the energy recovered may not be worth the cost of the windmill installation.
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12-07-2007 @ 8:21AM
Jim Carty said...
I've heard the complaint over and over again that the turbines would create extra drag on the traffic below. How would that happen? The idea is to recapture the energy that is already being expended, like the brakes on hybrid vehicles. The other argument I've heard that it wouldn't generate enough energy. In the business world, if there is a net gain, you do it. Especially if it can be repeated over and over again. Fortunes have been made on transactions that only net a few cents.
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3-02-2008 @ 12:12PM
mike said...
What if we put strips at points along the road that span the width of the roadway and have these plungers in them with magnetic coils that are pushed down when a vehicle drives over them and thus harness the energy available on our roads from all our vehicles? If we need more energy, we could put in more of these strips at increasing points along the roadway...Then all this gathered energy could be fed back into the grid, reducing it's dependence on fossil fuels to supply electricity to our homes... As our fossil fuel using vehicles get replaced over time with cleaner vehicles, we will have a perfect clean energy oop going...Our clean cars would use our highways, our highways would harness the massive energy potential, feed it to our power plants which will provide clean electricity for our homes...???
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6-03-2008 @ 10:19AM
Paul T said...
Highway wind turbines are a fantastic way of supplementing our energy needs, but as always, as with any great idea, the devil is in the details. For instance, these turbines would have to be serviced periodically. How do you do that without disrupting traffic? How about putting two or three turbines on a swivel arm, and when it comes time for maintenance, swing the arm to the side of the road where the turbines can be serviced in safety, without disruption to traffic?
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7-18-2008 @ 9:45AM
Daniel said...
I like this concept/I designed a system that uses kinetic energy from moving vehicles,to produce power/using hydrolic fluid and turbines/
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7-28-2008 @ 10:48AM
ed said...
if you coupled this system with a mod of wirless enrgy transmission the cars could potentialy power themselves also if you have the new paper thin solar cells on the vehicles it would be possible to get a net gain of enegy enough to power both the cars themselves and the surrounding area
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