CLV Willem de Vlamingh travaille en Taiwan

Formosa 2 Offshore wind farm, Taiwan

The world is going through an energy transition. More and more countries are going for renewable energy sources and Taiwan has shifted into a higher gear as well. Jan De Nul Group previously built the first commercial offshore wind farm (OWF), Formosa 1 Phase 2, and after the second, TPC Phase 1, works for the third have been concluded. Formosa 2 will provide 380 000 households with green energy. This makes it one of the largest operating windfarms in the region. Next to that, Jan De Nul also continues to deploy vessels on other windfarms under construction in Taiwan and remains active in the dredging sector.

Jan De Nul Group was awarded the EPCI-project (Engineering, Procurement, Construction & Installation) for both the foundations and subsea cables for the Formosa 2 OWF in 2019. This became the third offshore project for Jan De Nul in Taiwanese waters. Formosa 2 was developed by JERA, Macquarie’s Green Investment Group (GIG) and Synera Renewable Energy (formerly Swancor Renewable Energy). GIG was supported by its portfolio company, Corio Generation. The wind farm has a capacity of 376MW, thanks to the 47 Siemens turbines of 8MW each. These turbines stand on jacket foundations in water depths of up to 55 meters. The wind farm is located in an area from 4 to 10 nautical miles off the Miaoli County coast.


We built strong foundations...

For the production of the 188 pin piles, Jan De Nul subcontracted EEW KHPC. Some of these pin piles come with a weight of over 270 tons, a diameter of 2.4 meters, and a length of no less than 79 meters. In 2020, we transported the pin piles from the fabrication yards in South-Korea and Malaysia to the marshalling harbour in Taichung, Taiwan for temporary storage. A Heavy Lift Vessel commenced installing the pin piles on the 47 turbine locations, with the pin piles transported on pontoons. The final pin pile was placed on 22 August 2022. During the installation activities, Jan De Nul also managed to monitor the underwater noise levels and to observe marine mammals according to the environmental restrictions and permits. We did this by installing, among others, an air-bubble curtain around the installation zones, by which we diminished the underwater noise.

... and connected them to shore.

In 2020, Jan De Nul subcontracted LS Cable to produce 34.5 km of export-cable and 87 km of inter-array cables. Our Cable Installation Vessels Willem de Vlamingh and Connector picked up, transported, and installed the cables in respectively 2021 and 2022. Both ships also served as support for the Jet Trencher to bury the cables in certain parts of the seabed to protect them. We had already dredged other hard parts, using our dredging vessels Niña and Francis Beaufort.