“A new floating solar photovoltaic system in Singapore is just one hectare in size and is meant as a prototype. But it could help usher in a new wave of PV placements on water resources globally.”
Category: energy – Page 339
Hold onto your butts solar aficionados, the next generation solar roof is coming, and it looks good. During a brief event Friday night, Elon Musk presented his plan to integrate solar roofs with Powerwall power packs. But that’s not all. On Saturday Musk expanded on his talk by explaining via Twitter that the new solar tiles would come with some pretty sweet features — more specifically, built-in defrosters.
Unlike the solar systems of the past, Tesla’s newly designed roofs will feature aesthetically pleasing, energy efficient glass solar tiles, that will replace a home’s roof rather than sit on top of it.
Harsh weather conditions — like snow and ice — are known for wreaking havoc on traditional asphalt shingles, but that’s not the case with Musk’s new design. The solar glass tiles are not only more durable, but are also packing specialized heating elements that work much like the rear defroster does on your car.
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The laws of thermodynamics are some of the most important principles in modern physics, because they define how three fundamental physical quantities — temperature, energy, and entropy — behave under various circumstances.
But now physicists say they’ve found a loophole in one of these laws, and it could create scenarios in which entropy — or disorder — actually decreases with time.
Thanks to modern physics, almost everything in the Universe can be explained according to two theories: general relativity for the big stuff like stars, galaxies, and the Universe itself; and quantum mechanics, for behaviours on the atomic scale.
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So, could this material be also in the metal exterior of their cars?
Last Friday, Tesla Motors??? (TSLA) CEO Elon Musk debuted new solar roof shingles for homes at an event at Universal Studios in Los Angeles, reminding all of us that the electric car maker is much more than just a car company.
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Rubik’s-cube-sized CubeSats are a nifty, cheap way for scientists to put a research vessel into space, but they’re limited to orbiting where they’re launched – until now. Los Alamos researchers have created and tested a safe and innovative rocket motor concept that could soon see CubeSats zooming around space and even steering themselves back to Earth when they’re finished their mission.
Consisting of modules measuring 10 × 10 × 11.35 cm (3.9 × 3.9 × 4.5 in), these mini-satellites first launched in 2003, but are currently lacking in propulsion because they’re designed to hitch a ride into space with larger, more expensive space missions. They’re usually deployed along with routine pressurized cargo launches, usually into low orbits that limit the kinds of studies that CubeSats can perform.
This limitation is, of course, frustrating for space researchers. In fact, the National Academy of Science recently identified propulsion as one of the main areas of technology that needs to be developed for CubeSats.
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Given that the battery life of most multicopter drones typically doesn’t exceed 30 minutes of flight time per charge, there are many tasks that they simply can’t perform. Feeding them power through a hard-wired tether is one option, although that only works for applications where they’re hovering in place. Scientists at Imperial College London, however, are developing an alternative – they’re wirelessly transferring power to a drone as it’s flying.
For their study, the scientists started with an off-the-shelf mini quadcopter. They proceeded to remove its battery, add a copper coil to its body, and alter its electronics.
The researchers also built a separate transmitting platform that uses a circuit board, power source and copper coil of its own to produce a magnetic field. When placed near that platform, the drone’s coil acts as a receiving antenna for that magnetic field, inducing an alternating electrical current. The quadcopter’s rejigged electronics then convert that alternating current to direct current, which is used to power its flight.
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Electronics that can be embedded in clothing are a growing trend. However, power sources remain a problem. In the journal Angewandte Chemie, scientists have now introduced thin, flexible, lithium ion batteries with self-healing properties that can be safely worn on the body. Even after completely breaking apart, the battery can grow back together without significant impact on its electrochemical properties.
Existing lithium ion batteries for wearable electronics can be bent and rolled up without any problems, but can break when they are twisted too far or accidentally stepped on — which can happen often when being worn. This damage not only causes the battery to fail, it can also cause a safety problem: Flammable, toxic, or corrosive gases or liquids may leak out.
A team led by Yonggang Wang and Huisheng Peng has now developed a new family of lithium ion batteries that can overcome such accidents thanks to their amazing self-healing powers. In order for a complicated object like a battery to be made self-healing, all of its individual components must also be self-healing. The scientists from Fudan University (Shanghai, China), the Samsung Advanced Institute of Technology (South Korea), and the Samsung R&D Institute China, have now been able to accomplish this.
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