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Vtguy802812 t1_it5bwfb wrote

Reply to comment by grassytoes in Aeromine says they have solved many of the problems that have long made domestic rooftop wind power compare poorly to solar panels. They claim their "motionless" rooftop wind generators deliver up to 50% more energy than a solar array of the same price while taking up just 10% of the roof space. by lughnasadh

Hence why: “IT’D BE COOL”

Right now it is not feasible, perhaps one day someone will find a way to manage the drag.

It’s an theory that is being tested and studied. Look at EOEL or the Ventomobile or the Lotus Nemesis.

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grassytoes t1_it5ml1l wrote

Yes, it'd be cool, but it's not ever feasible. Not now, not with any future tech. It goes against the conservation of energy. If it worked, it would have to be a magical turbine that put out more energy than the kinetic energy it got from the wind.

The only reason regular wind turbines are useful is because the kinetic energy from natural wind is free. So we can convert a part of that to electrical energy. The car examples you gave use this free wind energy.

A turbine on the back of a car would be getting all of it's kinetic wind energy by slowing the car down and converting a portion of that lost energy to electricity.

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zoinkability t1_it5q6h1 wrote

It would violate the laws of physics. Over 100% of the power it generates would be coming from… the battery it is feeding power back to, with a whole lot of losses due to friction, etc. It is simply not possible and no amount of “it would be cool” will ever make it possible.

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