Wind turbines compared -- Best performers

In an analysis of the performance of 11,000 wind turbines in Germany, Sweden and Denmark conducted for WindStats Newsletter, a sister publication to “uåX˜äŠÊ˜·³Ç, all the best performing machines are identified as being sited offshore or close to the coast. The highest capacity factor is 45%, recorded by the Vestas turbines at the Horns Rev offshore station. An Enercon 500 kW turbine in north Germany was runner up at 37%. The average capacity factor in Denmark is 24%, compared with a 16% average in Germany.

The combined capacity factor of all 424 MW of offshore wind in Denmark was 39% in 2005, a year of relatively low winds. Age is no barrier to performance. Some of Denmark's oldest machines from the mid 1980s deliver capacity factors of 35% and more. The turbines with best productivity were a Bonus 2.3 MW unit at a coastal site in Denmark, an NEG Micon 2.75 MW unit in northern Germany and a Windworld 550 kW at Bockstigen off the Swedish island of Gotland. For the full analysis, see the latest issue of WindStats Newsletter.