par energy_isere » 19 juin 2009, 22:03
un nouveau concept d' éolienne en altitude :
L' idée est de mettre l'éolienne volante à 10000 m d' altitude la ou les jet stream offrent des vents 10 fois plus fort qu' à la surface.
Des études de vents en altitudes on été réalisées, voir ici :
http://www.inhabitat.com/2009/06/17/hig ... more-34618
Ken Caldeira of the Carnegie Institution’s Department of Global Ecology and Cristina Archer of California State University, Chico have created the first wind energy maps for high altitudes, and have assessed the potential wind energy density (kW/m²), which factors in both wind speed and air density. Their findings show that wind energy density is highest near populations centers, specifically over Japan and eastern China, the eastern coast of the United States, southern Australia, and north-eastern Africa. In those areas at high altitude, the average wind energy density is 10 kW/m² - compare that to the wind energy at ground level, which is, at best, 1 kW/m².
Ideally, the researchers say, “you would like to be up near the jet streams, around 30,000 feet,” where the “winds blow much more strongly and steadily than near-surface winds.” Jet streams winds are 10 times faster than surface winds making them that much steadier and reliable for renewable energy generation, despite their seasonal shift. A number of technologies have been proposed to capture this steady supply of wind, including tethered wind kites, which could generate up to 40 MW of power with current designs.
The Global Assessment of High-Altitude Wind Power also studied the wind resources of the world’s five largest cities - New York, Tokyo, Seoul, Sao Paulo and Mexico
un nouveau concept d' éolienne en altitude :
[img]http://www.inhabitat.com/wp-content/uploads/highaltitude_windenergykite.jpg[/img]
L' idée est de mettre l'éolienne volante à 10000 m d' altitude la ou les jet stream offrent des vents 10 fois plus fort qu' à la surface.
Des études de vents en altitudes on été réalisées, voir ici :
http://www.inhabitat.com/2009/06/17/high-altitude-wind-turbines-could-power-nyc/#more-34618
[quote]
Ken Caldeira of the Carnegie Institution’s Department of Global Ecology and Cristina Archer of California State University, Chico have created the first wind energy maps for high altitudes, and have assessed the potential wind energy density (kW/m²), which factors in both wind speed and air density. Their findings show that wind energy density is highest near populations centers, specifically over Japan and eastern China, the eastern coast of the United States, southern Australia, and north-eastern Africa. In those areas at high altitude, the average wind energy density is 10 kW/m² - compare that to the wind energy at ground level, which is, at best, 1 kW/m².
Ideally, the researchers say, “you would like to be up near the jet streams, around 30,000 feet,” where the “winds blow much more strongly and steadily than near-surface winds.” Jet streams winds are 10 times faster than surface winds making them that much steadier and reliable for renewable energy generation, despite their seasonal shift. A number of technologies have been proposed to capture this steady supply of wind, including tethered wind kites, which could generate up to 40 MW of power with current designs.
The Global Assessment of High-Altitude Wind Power also studied the wind resources of the world’s five largest cities - New York, Tokyo, Seoul, Sao Paulo and Mexico [/quote]