News tagged with wind turbines

Sharkskin actually increases drag

On an intuitive level, you'd expect a shark's skin to reduce drag. After all, the purpose of sharkskin-inspired riblets—the micro-grooved structures found in aircraft wings, wind turbine blades and Olympic-class swimsuits—is ...

dateMar 15, 2016 in Soft Matter
shares30 comments 2

Just how green is wind power?

Wind power may have a positive image, but setting up offshore wind farms is complicated and energy-intensive. Because Siemens promises its customers and the authorities a high degree of transparency for the environmental ...

dateMar 30, 2015 in Energy & Green Tech
shares34 comments 148

Upside-down lightning strikes

Upward lightning strikes initiate on the ground and head skyward. These discharges, which usually begin at the top of tall and slender structures, pose a real risk for wind turbines. An EPFL study analyzes the mechanisms ...

dateDec 11, 2015 in Earth Sciences
shares38 comments 7

Taming oceans for 24/7 power

Fossil fuels propelled the Industrial Revolution and subsequent technological advances. However, our future cannot be based on them, if only because they are a finite resource; and we are very close to exhausting them.

dateMar 03, 2016 in Energy & Green Tech
shares83 comments 0