Having already put its Google Wallet where its mouth by backing a solar power tower plant in California to the tune of US$168 million, Google has now turned to wind power. According to a report from Bloomberg Businessweek, the search giant has acquired Makani Power, a California-based startup whose Airborne Wind Turbine (AWT) technology first caught our interest in 2011.
The Makani Power acquisition comes from Google X, Google’s not-so-secret research and development arm that focuses on "moonshot" technologies, such as the Google driverless car and Google Glass. This is apparently the first time Google has acquired a company for Google X, but it’s not the first time it has invested in the wind power company. Google was a primary investor providing $10 million in funding to Makani Power in 2006, following up with another $5 million the following year.
Makani Power also received a grant in 2010 from the Department of Energy’s Advanced Research Projects Agency (ARPA-E) to help in development of its Wing 7 prototype. This is a 30 kW scale model of Makani’s planned 600 kW utility-scale devices that are designed to fly at altitudes of between 250 and 600 m (800 and 1,950 ft) and transmit electricity to the ground via a tether.
The tethered wings are outfitted with turbines that operate like conventional wind turbines, with air moving across the blades forcing them to rotate and drive a generator to produce electricity. However, Makani says fitting them to a flying wing provides increased performance in low winds, allowing the turbines to produce about twice the power of a traditional wind turbine of the same size, while requiring less materials to build.
Makani says their superior low wind performance means its AWTs would be economically viable in areas where conventional wind turbines aren’t. While the technology would by slightly cheaper to run than conventional wind turbines in good wind areas, Makami says their cost of energy would be half that of conventional turbines in typical onshore or offshore sites. The AWTs are intended to be installed in arrays over large areas, flying in a circular path and spaced approximately one tether-length apart to ensure they don’t become tangled.
On its website, Makani says it recently completed the first-ever autonomous flight demonstrating all flight modes, including launch, hover and landing. It also confirmed the Google acquisition, saying the extra resources provided by the deal will help them accelerate development of the technology with the goal of making wind energy cost competitive with fossil fuels.
Video of the recent fully autonomous flight of the Wing 7 prototype can be seen in the following videos. The first shows the flight at 5x normal speed from a distance, while the second provides a closer view.
Sources: Makani Power, Bloomberg Businessweek
As for foreign objects (like a small plane or hot air balloon), I think a wind-farm like this would be well marked on a map. Put lights on it. Radio transponders, literally dozens of solutions here. Birds? Well, we have that issue with regular windmills, we can figure this one out too.
I think this is one great idea, just gotta see if the testing shows good power/cost ratio. Also reminds me of the kite power generators that pull on the tether to spin a generator, then get pulled in by the spring, and repeat.
2)---the alternative wind capturing ---everything else---has gone from nothing to something a) kitesurfing as a sport b) vertical wind turbine research while mostly bogus in comparison to normal windmill design (hoisted on a giant pole) underlies an explosion in the study of aerodynamics--- b1) nonvertical wind capturing research based on vibration of a string or moving a sheet or tube to capture vibrational energy have been toyed with c)kite power for large ocean going vessels to supplement their fuel use d) exotic wind power designs for high altitutde have arrived----mounted on large balloons and on wings---like this makani power. these tethered wind power designs all desire to take advantage of high wind speed. e) exotic wind power designs based on thermal heat landscaping have been played with, including building wind turbines into actual buildings---or on the side of mountains whose heat radiates into the air creating windscapes.
all pretty amazing. google admitted to shoving 15 million into this idea already and now maybe just picked up the rest of the ownership as the company admits it cannot pay its bills.
while this flying wing might not be that interesting---IT DOES----look like there is a lot of truly excellent technology being developed here that could be used on other platforms for other purposes. ====namely energy scavenging the wind for NON grid applications. using turbinges on wings to produce energy is nothing new. many people have thought up this concept before (mistakenly as an idea for perpetual power during flight) -----HOWEVER---there is a lot to be said for the future of high tech and wind----
for example one thing i'm interested in is a traction kite/wing/foil that can work in ALL wind speed and be launched from the ground with no wind speed to reach 100 meters up. and be controlled with ONE line. yes one line.