Wind power is big business in the UK. Back in January of this year the UK government announced that it had granted licences for nine huge offshore windfarms, with the potential to generate 32GW of power – a quarter of the country’s needs. Today Mitsubishi Power Systems Europe revealed that it plans to invest £100m in wind turbine production in the UK.
The economics of an offshore wind farm are almost the opposite of a conventional power station. It’s relatively cheap to build a coal, oil or gas fired power station, but the running costs are high as fuel becomes more and more expensive. A windfarm – especially offshore – has very high upfront costs but the running costs are extremely low, as the fuel is free.
When it blows, that is. Much has been made of Denmark’s ability to generate 20% of its power from wind, but this is really only feasible because of a nifty deal the Danes have made with their Scandinavian neighbours. When the Danish wind blows, they export electricity to Norway and Sweden: when it doesn’t, their neighbours bale them out with hydroelectric power. If we’re serious about wind power in the UK, we’re going to have to find some way of balancing supply and demand like this.
One thing we don’t have to worry about is birds. It’s often said that wind turbines kill huge numbers of birds. Indeed, it’s estimated that Danish windfarms kill around 30,000 birds a year. That sounds quite a lot until you compare it to one million birds a year killed by traffic in Denmark, or the 55 million birds a year killed in Britain by cats.
