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Power

— Environment

Rubber trailing edge flaps could result in quieter, more productive wind farms

By - February 28, 2010 5 Pictures
If you’ve ever seen a commercial-scale wind turbine in real life, then you’ll know that they’re huge – a single blade can be as long as 60 meters (197 feet). Researchers from Denmark’s Risoe DTU National Laboratory for Sustainable Energy tell us that such blades can flex by up to six meters (20 feet) when subjected to strong wind gusts. Worse yet, the gust load is often not evenly distributed along the length of the blade, so it doesn’t flex evenly. Fortunately, the researchers are working on addressing this problem, by attaching flexible flaps to the trailing edges of the blades. These flaps come in the form of silicone rubber strips, which run the length of the blade. The result, we’re told, will be quieter, higher-output turbines. Read More
— Environment

Secret Energy Turbine: rooftop wind power in stealth mode

By - February 23, 2010 5 Pictures
Few people would argue that having a rooftop wind turbine could help offset your power bills. Your neighbors, however, might not appreciate the sight of a windmill on your roof, nor would they like the sound of its blades whistling through the air. Don’t give up on the idea yet, though, because British inventor Rupert Sweet-Escott has come up with a product that he claims addresses those problems. His Secret Energy Turbine (SET) looks like an ordinary chimney stack and is boasts almost completely silent operation. Read More
— Mobile Technology

Dexim iPod Nano 5G Power Case

By - January 16, 2010 11 Pictures
China's consumer electronics manufacturer Dexim has announced the release of a multi-functional power case to complement the new iPod Nano 5G. Coming with a powerful flashlight to help shoot video in low light conditions, a built-in speaker for desktop listening and an antenna for improved FM radio reception, the DVA004 will also gives extended play courtesy of its lithium battery pack. Read More
— Inventors and Remarkable People

Researchers show off tiny piezoelectric energy capture sensor

By - January 7, 2010 1 Picture
Working within the Holst Centre program on Micropower Generation and Storage, researchers have developed a small piezoelectric device capable of harvesting 85 microwatts of electricity from vibrations. Fabricated using MEMS technology, the fully autonomous temperature sensor generates enough power to wirelessly measure and transmit environmental data to a base station every 15 seconds. Read More
— Science

Hybrid biological machines powered by bacteria

By - December 21, 2009 2 Pictures
Researchers have discovered that common bacteria suspended in a solution can be made to turn microgears. This opens up the possibility of building hybrid biological machines at the microscopic scale. The researchers say the discovery demonstrates how microscopic swimming agents, such as bacteria or man-made nanorobots, in combination with hard materials, can constitute a "smart material", which can dynamically alter its microstructures, repair damage, or power microdevices. Read More
— Military

Marines take GREENS solar power to the front lines

By - December 9, 2009 1 Picture
In response to a Marine Corps requirement from Iraq for an expeditionary renewable power system, the Office of Naval Research (ONR) Advanced Power Generation Future Naval Capabilities program has introduced technology designed to harness some of the sunlight that beats down upon U.S. Marines operating in the Arabian Desert. Fueled by the sun, the Ground Renewable Expeditionary ENergy System (GREENS) is a portable, 300W, photovoltaic/battery system that provides continuous power to marines in the field. Read More
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