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Old 12-12-2008, 02:05 PM   #1
AVANTI R5
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Default Israeli engineers to begin testing of ‘electric road

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Although it’s widely agreed upon that the electrification of the automobile will be the future of four-wheel motoring, there is still a raging debate about how to charge future EVs. However, a group of Israeli engineers may have discovered the solution in the form of a power-generating road.

The system works by implanting tiny piezoelectric crystals into the asphalt, which created power when driven over. The engineers claim that 1km stretch of asphalt equipped with the power-generating system would create enough electricity to power eight electric vehicles.


Moreover, the Environmental Transport Association says that if every British motorway was equipped with the technology, there would be enough electricity generated to power 34,500 EVs.


That being said, the technology is still a long way from seeing wide-spread use. The engineers will begin testing the ‘electric road’ next month, but, if the technology proves viable, it could be a simple and efficient way to power the EVs of the future.
http://www.leftlanenews.com/israeli-...ext-month.html
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Old 12-12-2008, 02:19 PM   #2
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so... what happens when ur stuck in slow moving traffic?
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Old 12-12-2008, 02:25 PM   #3
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Default New road technology generates power to run cars

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London, England - The British Environmental Transport Association (ETA) has announced a new road surface technology that generates electricity as traffic drives over it, and which could one day become a source of cheap power.
Developed by engineers at the Technion-Israel Institute of Technology, the road contains tiny piezoelectric crystals that produce electricity when squeezed, and which generate a small electrical charge when a vehicle passes over them. The engineers claimed that they can produce up to 400 kilowatts from a one-kilometre stretch of dual roadway, which is enough per hour to run eight Ford Fiestas.


The engineers said that if the system was installed on every stretch of British motorway, it would generate enough energy to run 34,500 small cars.


“The government predicts a massive shift to electric cars, and it may be that roads themselves will provide some of the new fuel,” said Andrew Davis, director at the ETA. “Certain vehicles could be powered entirely by the roads on which they drive. If these electric roads can be put into place without harm to the environment, they would be a silver lining to the problem of heavy traffic.”


The road will be tested with vehicles in Israel next month.
http://www.canadiandriver.com/thenew...o-run-cars.htm
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Old 12-12-2008, 03:17 PM   #4
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so... what happens when ur stuck in slow moving traffic?
I would imagine that the additional density of the slow-moving traffic helps to offset some of the losses.
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Old 12-12-2008, 03:34 PM   #5
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so... what happens when ur stuck in slow moving traffic?
U use your battery.
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Old 12-13-2008, 12:14 AM   #6
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...aaaaand another piece of the puzzle falls into place. Add in the mini-windmills on the barriers between opposite traffic flows, and you have a serious way to offset the energy being used to move people.
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Old 12-13-2008, 12:30 AM   #7
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A road full of piezoelectric generators would cost insane amounts of cash. I bet durability would suffer as well. What would happend when you hit a pot hole? la la la *bump* *ZAP *car explodes*.....head asplode
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Old 12-14-2008, 04:33 PM   #8
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Sounds like a failure to understand conservation of energy. Where is the energy coming from? The cars driving over it. Great, power them with their own energy. How about instead of making the road take energy from cars to power cars, we improve the road surface so it doesn't draw the energy away from the car to begin with. Magic.
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Old 12-14-2008, 07:51 PM   #9
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Sounds like a failure to understand conservation of energy. Where is the energy coming from? The cars driving over it. Great, power them with their own energy. How about instead of making the road take energy from cars to power cars, we improve the road surface so it doesn't draw the energy away from the car to begin with. Magic.
the energy is being used by the vehicles anyway and is currently just being dissipated as heat in the tires, brakes, and suspension. using this energy is a smart thing. fwiw i remember a wired (?) blurb about a bridge in japan using this technology earlier this year, so it's not the first installation.
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Old 12-14-2008, 11:14 PM   #10
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the energy is being used by the vehicles anyway and is currently just being dissipated as heat in the tires, brakes, and suspension. using this energy is a smart thing. fwiw i remember a wired (?) blurb about a bridge in japan using this technology earlier this year, so it's not the first installation.
From what I understand, this system uses the energy from all cars on the road to generate power for a few (8 per km) electric cars simultaneously operating on said roadway. While the idea seems decent, It has a diminishing rate of return as more electric cars come online. It's like the mass-transit systems in major US citites that are paid mostly by gas taxes. when people switch in large numbers from driving to rail/bus fuel usage goes down, revenue goes down, but cost and demand goes up. It's a bad model which sets up to kill itself in the future.

The system in Japan is one where the force of a car driving over a bridge creates a vibration. That motion is then converted to electricity to power lighting for the bridge. It a complementing system.
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Old 12-14-2008, 11:25 PM   #11
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From what I understand, this system uses the energy from all cars on the road to generate power for a few (8 per km) electric cars simultaneously operating on said roadway. While the idea seems decent, It has a diminishing rate of return as more electric cars come online. It's like the mass-transit systems in major US citites that are paid mostly by gas taxes. when people switch in large numbers from driving to rail/bus fuel usage goes down, revenue goes down, but cost and demand goes up. It's a bad model which sets up to kill itself in the future.

The system in Japan is one where the force of a car driving over a bridge creates a vibration. That motion is then converted to electricity to power lighting for the bridge. It a complementing system.
both are piezoelectric: vibration into energy. i'm pretty sure the blurb from the OP is just a crude measure of how much electricity this thing generates. i see nothing in it that implies that the power would go directly towards the needs of electric vehicles on the road. (for those in the computer field it's like measure data in newspaper articles in terms of the number of "libraries of congress" that could be held on it.)
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Old 12-15-2008, 09:23 AM   #12
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Originally Posted by Scrotus View Post
Sounds like a failure to understand conservation of energy. Where is the energy coming from? The cars driving over it. Great, power them with their own energy. How about instead of making the road take energy from cars to power cars, we improve the road surface so it doesn't draw the energy away from the car to begin with. Magic.

This sounds like a failure on your part to understand the conservation of energy, or at least how it applies to this scenario. As was already said, the compressions of the road way are already occuring. Currently, that energy is being wasted and turned into heat. This method would capture some of that wasted energy and turn it into electricity. I suppose you're going to tell us that turbochargers are impractical too? They work on the same principle by recovering waste energy.

I think you're failing to see the big picture. The use of the example of 8 electric cars per 1 km of roadway was an analogy to show how much electricity this type of system could generate. I would think their plan would be to feed this electricity into the grid or maybe use it to power recharging stations. The energy wouldn't have to be used by cars traveling on THAT particular road. Additionally, non-electric cars are now being utilized to generate electricity too. It sounds like a nice concept in theory.

Now, what remains to be seen is the economic impact of this type of system. The real question is, is it more expensive to install this system than the benefits it will create? We'll have to see.
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