Capacity factors at Danish offshore wind farms

Posted by – 2017/05/19

monthlygenHere are the average capacity factors of every Danish offshore wind farm, newly updated to include data to the end of April 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.

All numbers are to the end of April 2017. Analysis by EnergyNumbers.info. Raw data from ens.dkLatest
rolling
12-month
capacity
factor
Life
capacity
factor
Age
(y)
Installed
capacity
(MWp)
Total
elec. gen.
(GWh)
Power per
unit area
spanned
(W/m2)
Rolling annual
capacity factors
(click to enlarge)
Total43.6%41.5%127140 3082.6Total
Anholt 150.5%48.7%4.1399.66 9582.2Anholt 1
Avedøre Holme34.4%38.2%6.810.8247Avedøre Holme
Frederikshavn29.5%30.7%13.97.6285Frederikshavn
Horns Rev I41.7%42.0%14.51608 5533.4Horns Rev I
Horns Rev II48.9%48.0%7.7209.36 7523.0Horns Rev II
Middelgrunden25.0%25.5%16.3401 463Middelgrunden
Nysted (Rødsand) I34.8%37.1%13.9165.67 4792.6Nysted (Rødsand) I
Nysted (Rødsand) II40.3%43.8%6.92075 4572.7Nysted (Rødsand) II
Rønland I46.2%44.5%14.317.2960Rønland I
Samsø35.5%39.2%14.2231 125Samsø
Sprogø30.8%34.6%7.521478Sprogø
Tunø Knob30.8%30.3%21.95291Tunø Knob
Vindeby (closed)23.5%25.54.95261Vindeby

Calculation method

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.

Sources

ENS register of Danish wind turbines: thanks to ENS and to Energinet.DK for making the turbine-specific data behind this table available. This post gets updated as new data becomes available.

7 Comments on Capacity factors at Danish offshore wind farms

  1. Now:: Capacity factors at Danish offshore wind farms http://j.mp/hWjeIk #offshorewind

  2. RT @EnergyNumbers: 40%+ capacity factors at Danish offshore wind farms http://j.mp/hWjeIk #offshorewind

  3. […] visar på en betydligt högre utnyttjandegrad än vad man tidigare har antagit. Vindkraftparken Horns Rev 2 hade en kapacitetsfaktor på 52 %, vilket är […]

  4. […] capacity the entire time. See Energy Nos., Capacity Factors at Danish Offshore Wind Farms, http://energynumbers.info/capacity-factors-at-danish-offshore-wind-farms (last visited Nov. 18, 2012). Newer European offshore wind farms can achieve between 44% and 48% […]

  5. […] voor elke individuele Deense windturbine wordt per maand gepubliceerd. Een interessante blog op basis van die gegevens laat zien dat de productiefactor van de nieuwste Deense windparken door […]

  6. […] hier niet of nauwelijks. Om die bewering te staven: er zijn al bestaande windparken in Engeland en Denemarken met een oppervlak in de orde van 100 à 200 vierkante kilometer, waar van de door Miller […]

  7. […] However, it’s hard to separate out variations in wind availability over the years from any operational degradation and technical/operational improvements. Danish offshore load factors from 1980 to 2011 mostly seem to indicate continual improvement: http://energynumbers.info/capacity-factors-at-danish-offshore-wind-farms […]

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