New Rooftop Wind Turbine Tested: The Helyx

Recently, I wrote about the low-profile Aerotecture wind turbines, which are designed to be installed on the rooftops of city buildings. Now I’ve heard of another rooftop wind turbine under development. It’s called the Helyx Wind Generator, and it’s composed of two twisted wings of fiberglass that rotate around a vertical axis. The turbine is […]

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New Plastic Solar Cells Mimic The Veins In Tree Leaves

Researchers at Wake Forest University have announced they they have created plastic solar cells with an efficiency of 6%. Researchers say that have achieved record efficiency for organic or flexible, plastic solar cells by creating “nano-filaments” within light absorbing plastic, similar to the veins in tree leaves. This allows for the use of thicker absorbing […]

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New 3D Solar Cells Created

Recently, we featured some intriguing spherical solar cells from Japan. But now there’s an announcement that unique 3D solar cells have been created using nanotubes. The 3D solar cells capture photons from sunlight using an array of miniature “tower” structures that resemble high-rise buildings in a city street grid. The tower structures, which are about […]

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0 to 60 MPH in Under 1.5 Seconds, Electric KillaCycle Sets New World Speed Record

The KillaCycle, the world’s electric motorcycle, and the official world record holder in the ¼ mile drag, broke the world record again using its lithium-ion batteries. The official record for any electric vehicle worldwide in the ¼ mile is set now at an elapsed time of 8.16 seconds. Weighing just over 165 pounds, the A123Systems […]

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Electric Tankless Water Heaters

Note: This post has been expanded and updated for 2009! Tankless water heaters only heat water when it is needed. About 8% to 30% of the energy consumed by a standard water heater goes to keeping the water hot while it’s not being used. New tankless systems heat the water instantly when you turn on […]

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