Google's giant "kite" can generate wind energy from almost anywhere

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  1. AstroJane

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    A Google X division company named Makani has designed a giant “kite” that can generate enough wind energy to power about 300 homes. Named the “M600” after the 600 kW of electricity produced by its movement, the craft resembles a sport glider with two levels of multiple propellers on the front, more generally described as an aerodynamic wing. After more than ten years of development and a prototype test flight in 2016, M600 has begun full size testing in Hawaii this year to continue its journey towards becoming a portable power solution that can be brought anywhere with sufficient wind to propel it.

    The functionality of M600 is fairly straightforward. After being connected to a 1400 foot high-strength tether, it uses 8 onboard motors to climb from a 15-foot base station to its determined altitude (about 1000 ft) with a small amount of voltage power. Then, it transitions into crosswind where it flies in 800 foot wide loops lasting 10-25 seconds each to generate maximum power via onboard computers guided by data from sensors, GPS, and an inertial navigation system.

    The rotation of the 85 foot wide kite’s rotors drives magnet motors/generators on board, producing electricity that transfers down the tether where it can be connected to an energy grid. The electricity comes down in DC (direct current), but is converted to AC (alternating current) at its base station.

    [​IMG]The M600 wind power kite during testing in Hawaii. | Credit: Makani/X Development LLC[​IMG]The M600 wind power kite during testing in Hawaii. | Credit: Makani/X Development LLC[​IMG]The M600 wind power kite during testing in Hawaii. | Credit: Makani/X Development LLC[​IMG]The M600 wind power kite during testing in Hawaii. | Credit: Makani/X Development LLC[​IMG]The M600 wind power kite during testing in Hawaii. | Credit: Makani/X Development LLC[​IMG]The M600 wind power kite during testing in Hawaii. | Credit: Makani/X Development LLC

    One of the needs driving Makani’s kite is accessing wind sources that aren’t practical or cost-effective in today’s markets. Its mass is about 10% of a conventional wind turbine with similar output thanks to the carbon fiber materials it’s primarily made from. The lighter, portable design of the M600 could help bring wind energy to areas devastated by natural disasters and places where coastal waters are too deep for other wind systems to sit on the seabed.

    Google’s X division (under the broader parent company Alphabet Inc.) is a secretive development factory dedicated to radical innovations that solve the world’s toughest problems. It provided the initial funding for Makani’s kite technology as part of its 2007 RE

    Article: Google's giant "kite" can generate wind energy from almost anywhere
     

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