Wind energy

Who tickles your cheek today and batters trees or spreads forest fires tomorrow? The wind of course! This can be both gentle and biting. When it wants to, it can easily turn a wind turbine’s large, heavy blades.

A wind turbine requires enormous amounts of air to turn.

The blades constantly circle round. If the diameter of the blade circles is over 54 m, then the wind turbine covers an area of 2,290 m². That is half a football pitch!

A strong gale of 15 metres per second pushes 42 tonnes of air through this blade area.

The wind turbine can harness one million joules of energy every second from the streaming mass of air. It is said that this can create an effect of 1 megawatt (1 MW). This is enough to heat 500 electric kettles – at the same time!

Modern wind turbines can be higher than the Eiffel Tower and harness up to 10 or 20 MW in good wind conditions.

In Denmark, 20% of our electricity is generated by wind energy. In 2025, this could be as high as 50%. Wind turbines currently generate 3% of all the energy we use.