Hollandse Kust Noord OWF

The 759 MW subsidy-free Hollandse Kust Noord Wind Farm project is split across two sites. The CrossWind consortium, a joint venture between Shell and Eneco, won the tender for the two sites in July 2020. It was the last tender under the 2023 Offshore Wind Roadmap.

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As well as using the latest 11 MW direct drive turbines from Siemens Gamesa, the project will also feature five technology demonstrations. These could be implemented at full scale in the future. So as well as generating at least 3.3 TWh of electricity by end 2023, Hollandse Kust Noord (HKN) will feature a 0.5 MW floating solar farm, short-term battery storage (1MW/5 MWh), turbines optimally tuned to the network to minimise negative 'wake' effects (part of the Dynamic Wind Farm Flow Control project led by TU Delft), and a system to produce green hydrogen for storage (a 2.5 MW electrolyser 2.5 and 1 MW fuel cell). The combination of these measures will ensure a continuous power supply regardless of wind conditions.

Construction

The two HKN sites are 18.5 km off the coast at Egmond aan Zee and have a combined size of 92 km2. CrossWind expects to start construction early in 2023 with all of the 69 turbines online by the end of the same year. As with Vattenfall's Holland Kust Zuid (HKZ) project, Siemens Gamesa latest generation 11 MW turbines will be used at HKN. Siemens Gamesa will also service and maintain the turbines under a 15-year agreement.

The SG 11.0-200 DD offshore wind turbine provides a high degree of reliability in demanding offshore wind projects from its strong performance, swift time-to-market, and low risk. With a 200 m diameter rotor utilising the 97 m long Siemens Gamesa B97 Integral Blade, the machine provides an increase of 9% in Annual Energy Production compared to the SG 10.0-193 DD offshore wind turbine.

Also as for HKZ, SIF is supplying its new TP-less monopile foundations for the CrossWind project. These have the work platforms and ladder attached directly to the monopile, rather the use transition pieces. SIF will start manufacturing the foundations in 2022 and store them at Maasvlakte facility in Rotterdam. Van Oord will then transport them to site, starting in early 2023, and install them.

Shareholders

The CrossWind Consortium is a joint venture between Shell (79.9%) and Eneco (20.1%).

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At a glance

  • Owner: CrossWind Consortium (Shell and Eneco)

  • Total capacity: 759 MW (expected to generate 3.3 TWh of electricity, enough to power more than one million households)

  • Wind turbines: 69 Siemens Gamesa 11 MW

  • Location: 18.5 km off the coast at Egmond aan Zee in Noord-Holland Province

  • Size of the site: 92 km2

  • Water depth: 15-28 m

  • Foundation type: Monopiles

  • Other Innovations: Floating solar farm; short-term battery storage, green hydrogen

  • Construction Start: 2023

  • Fully operational: 2023

  • Operation and maintenance base:

  • Main suppliers: Siemens Gamesa, SIF

  • Installation: Van Oord

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