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Risoe DTU's wind turbine blade section being tested in a wind tunnel

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

Sights like this could soon be commonplace

True to its word the formerly secretive Bloom Energy launched its Bloom “Box” (hereafter known as the Bloom Energy Server), today at eBay’s California HQ. Attended by Governor Schwarzenegger and Bloom Energy board member Colin Powell, the event revealed more concrete specifications for the fuel cell, as well as some of the corporate household names that are already customers.  Read More

Two Secret Energy Turbine rooftop turbines

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

Bloom Energy founder, K.R. Sridhar, and the fuel cell that forms the heart of the Bloom Bo...

Bloom Energy has definitely generated some buzz this week with a story on 60 Minutes ahead of the official launch this Wednesday of the Bloom Box – an electricity generating fuel cell box designed to sit in the back yard and provide enough power to reliably, more cleanly and cheaply power a house.  Read More

The Control4 EC-100 energy controller - part of the company's EMS 100 energy management sy...

At CES 2010, home automation and entertainment company, Control4, released a new energy-saving system, an app that turns Blackberries and Droid handsets into remote control for its system, and even added an app store which it is hoping will have the same impact on home automation that iTunes had on music.  Read More

Dexim's DVA004 Power Case for Apple's iPod 5G

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

Dexim's solar-powered P-Flip power pack was launched at CES 2010

Dexim has launched five new accessories to be used with the iPod, iPhone and BlackBerry at CES 2010. One of the more clever offerings is the solar-powered P-Flip foldable power pack. The power pack can be flipped horizontally or vertically for hands-free viewing and is capable of extending talk time by up to eight hours.  Read More

Fully autonomous wireless temperature sensor powered by a vibrational energy harvester

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

Diagram tracking the movement of gears turned by the bacteria (Image: Igor Aronson/Argonne...

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

The GREENS solar panels can be rapidly deployed in the field to provide front line forces ...

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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