hurricaneproof6

Blade tip always kept into wind;
“Flexible” rotor behaves like
palm tree in storm

HOW IT WORKS

Seawind is opening up new markets for offshore wind. With its teetering hinge and yaw control it is built for violent offshore conditions, even for areas frequently hit by hurricanes or typhoons. Seawind’s technology with it’s “flexible rotor” is compliant with the forces of nature and can withstand Category 5 hurricanes and extreme gusts. 

The ability to withstand high force winds is extremely important to markets such as East Asia and the US as it significantly reduces the risk of damage in case of extraordinary events and lowers the investment risk in high wind speed sites.

 

● A study found that up to 50% of shallow water offshore wind turbines in the US would be destroyed by hurricanes over a 20-year period

 

● Typhoon Usagi (2013) in Hong Kong damaged 70% of 25 Vestas turbines

 

● A study of typhoons in Philippines found 40 events in the past 50 years that had wind speeds up to 306 km/h. Seawind turbines can resist extreme gust speeds up to 350km/h.

ADVANTAGES

In hurricanes Seawind points blade tips into the wind in a “flexible configuration”
● Seawind’s LIDAR (laser detector) detects hurricane or strong gusts well ahead

 

● During hurricanes, the loads on blades and drivetrain are similar to normal operations

 

● Seawind’s “flexible rotor” is compliant with the forces of nature and not facing them

 

● Independent simulation results show Seawind can withstand Category 5 hurricanes (250 km/h) without damage

 

● Three-bladers are parked with blades pitched at 90°, the tip chord parallel to rotor shaft, and its leading edge into wind

 

● Three-blader’s configuration cannot eliminate risk of major damage or total loss

THREE-BLADED TURBINE

ontplofPhoto: 3-bladers at Ardrossan wind farm after major storm

 

Typhoon Usagi (Hong Kong, in 2013): 70% of 24 Vestas
turbines damaged, 8 turbines blown off: click here
Study: up to 50% of US offshore wind turbines would
be destroyed over a 20 year period by hurricanes: click here

inthewind