Here are the average capacity factors of every Danish offshore wind farm, newly updated to include data to the end of May 2017. The Anholt 1 windfarm, which only opened in 2013, hit an average capacity factor of 47.4% for the full year 2016. Compare these with the capacity factors for German and UK offshore wind farms.
Danish windfarms also include the most productive wind turbines in the world, at Rønland I: the turbines have been operating for over 14 years now, with a lifetime capacity factor of 44.5%; of its eight turbines, four are rated at 2.3MW peak power, and each of those four had by the end of July 2014 generated over 100 GWh: the first turbines to pass that milestone.
And, for the first time, I’ve had to update the calculations for a new phenomenon: the first decommissioning of a commercial offshore windfarm: Vindeby generated its last electricity in February 2017, after a remarkable 25 years of life.
Just as with the UK offshore windfarm capacity factors, these capacity factors are calculated by calculating, for each turbine in a given wind farm, the number of hours since it was first connected to the grid. This is then multiplied by its capacity, to give the number of peak-MW-hours. These figures are summed across all turbines in a wind farm, and divided into the total energy generated by that wind farm, to give its capacity factor.
Power yield per unit surface area spanned is only calculated for the larger windfarms: when a windfarm is just a single row of turbines, it doesn’t have a well-defined surface area spanned. These yield figures represent 90% of the installed capacity.