Let's Glide on Air with Supercooled Quantum Levitation

You probably saw that super viral quantum locking levitation video that bounced all over the Web last week (though technically it’s been around since summer) in which a team of researchers plays with some liquid nitrogen, a small superconducting disc, and some strange quantum phenomenon that makes the disc hover above a magnet, no strings attached. This week’s levitation vid taps a similar phenomenon known as the Meisnner effect to achieve this kind of levitation at a decidedly cooler scale: that of the hoverboard.

MagSurf, build by researchers at Universite Paris Diderot in France, flips the strange world of the quantum into a more sci-fi application, essentially turning a skateboard like platform into one big magnetic superconductor. Using liquid nitrogen, the team turn the platform super-cold, creating an electromagnetic field that is expelled from the inside of the board. It’s not quantum locking--the skateboard is too big to mimic that little super-cooled disc--but it provides enough outward magnetic force to float above a rail of permanent magnets.

It’s sort of like a Maglev train, and sort of not. But, says SmartPlanet, one group of researchers in Japan is reportedly working on scaling exactly this kind of technology into better levitating train tech. That sounds somewhat difficult, given the extremely low temperatures needed to make this kind of thing work. For your enjoyment, the quantum locking video--which is really cool if you haven’t seen it--is below.

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Posted in: environment clean generations,glide,japan,magnets,physics,Supercooled Quantum Levitation,technology

A Personal Turbine

Among homeowners, wind energy has never caught on, in large part because personal turbines are often noisy and inefficient. Most turbines need strong winds to turn a heavy central generator and create current, a design with two main disadvantages. 

First, the gears make a lot of noise. Plus, the generator is positioned at the blades’ center, which moves at one tenth the speed of the periphery. And less speed translates to less power.

 

Honeywell’s wheel-shaped WT6500 takes an entirely new approach. Magnets mounted near the tips of its 20 blades sweep through an outer ring of copper coils to produce a current, making the entire wheel the generator. 

Because this arrangement traps energy from the fast-moving blade tips and eliminates the heavy central generator, the WT6500 can pull a current from winds as slow as two miles an hour (most home turbines need 8mph gusts). 

Better suited to home use than other turbine designs, the wheel is six feet in diameter, whisper-quiet, and can produce up to 1,500 kilowatt-hours of power per year—enough to replace about 15 percent of an average household’s energy bill. 

Depending on an area’s clean-energy incentives, the turbine can pay for itself in only a couple of years, though most owners will make back their investment in five to 10.

HOW IT WORKS

• A flap on either side of the wheel catches wind, which spins the turbine toward the gusts.
• The wind moves the turbine wheel, including its 20 blades.
• The blade tips contain rare-earth metal magnets. As they sweep through copper coils in the outer frame, they generate a DC current.
• An inverter [not shown] gathers the current. It can store the power in a battery or convert it to AC for immediate use.

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Posted in: A Personal Turbine,clean energy,copper,inefficient,magnets,noisy,wind