Risk of ice-throw
Green – minimal risk.
Yellow and orange – low/middle risk. Follow advice below.
Red – high risk. Avoid traffic near the turbines.
What is ice throw?
Atmospheric icing may arise when water droplets in the air freeze when coming into contact with certain objects.
The most common form of atmospheric icing occurs when supercooled water droplets in clouds freeze and turn to ice, attaching to different constructions. Icing may also appear in periods of rain containing supercooled water droplets or wet snow.
These climatic conditions may result in ice appearing on the tower of the wind turbine, the nacelle or the blades.
The climatic conditions may vary a great deal inside a small geographical area, leading to considerable variations concerning the amount of icing on wind turbines found within the same location.
Please note: because of the height difference between the wind turbine and the ground, a layer of ice may develop even if there is no snow or ice on the ground.
Based on a data collection period of 3 years, icing has been shown to form on instruments 7.1 % of the year, corresponding to about 25 days.
Ice that detaches and falls from a wind turbine is referred to as ice throw.
Ice throw may pose a danger to people and animals in the vicinity of the of the turbines. Ice falling from the turbine blades may also lead to minor damages to the turbine itself.
Det er i beregninger antatt at isbitene alltid kastes 90 grader til høyre for vindretningen, med et lite tillegg på 15 grader i vindens retning. Med vind hovedsakelig fra østlig retning under isingsforhold er det i beregningene antatt en stor sannsynlighet for iskast mot nord-nordvest og nord. I realiteten vil det være en relativt stor spredning i kastretningene og bruk av retningsfordelingen kan derfor være noe misvisende.
Sannsynligheten for at en person blir truffet er veldig liten, men om det skjer kan skadeomfanget bli alvorlig.
Sjekk derfor alltid isingsprognosen på hjemmesiden vår før du går inn i vindparken.
Takk for at du samarbeider med oss slik at ingen blir utsatt for unødvendig fare og kan komme til skade.
- Check risk of ice-throw on our website
- Hazard increases with closeness to the turbines
- Recommended safety-distance is 300 meters
- Consider weather conditions: Risk is much greater when misty and temperatures are around 0 degrees celcius.
- If you are walking towards a wind-turbine, do it with the wind in your back – then ice will drift with the wind away from you.
For coordination with Site Manager on guard, contact us by calling the number +47 477 04 435.
For media enquiries, please contact our Stakeholder Manager, Helge Toft, at the number +47 930 64 111