Jan De Nul has started offshore installation activities for Taiwan Power’s 109MW Changhua Demo project offshore wind project, off the coast of Taiwan.
The first 12 pin piles have been installed and the first export cable has been connected to shore near Fangyuan in Changhua County.
The offshore wind farm consists of 21 offshore wind turbines on pre-piled jackets, each anchored to the seabed by four steel pin piles.
In the first phase, Jan De Nul will install 44 pin piles for 11 jackets, of which 12 are installed.
Forty more pin piles will be shipped from the fabrication yard in South Korea to Taiwan in the coming weeks.
For the installation campaign, Jan De Nul chartered the offshore installation vessel Aegir Heerema Marine Contractors.
Simultaneously, Jan De Nul’s cable-laying vessel Willem de Vlamingh started installing the submarine export cables for the project and the first out of four cables was recently pulled to the onshore junction box.
Due to the presence of a nearshore oyster farm and an important shipping lane in the trajectory of the subsea cables, these subsea cables must be buried 21 metres below the seabed.
Jan De Nul drilled four 1km-long pipes by horizontal directional drilling (HDD) from the offshore site to the onshore junction box.
The landfall works were executed by means of two of Jan De Nul’s Starfishes, trenching excavators, and with the support of Taiwan-based Hung Hua Construction.
Taiwan Power the EPCI contract for the Changhua Demo to a consortium comprising Jan De Nul and Hitachi in 2018.
The project entails the manufacturing and installation of 21 offshore wind turbines, each with a capacity of 5.2MW.
Jan De Nul is responsible for the design, fabrication and installation of the foundations, the installation of the wind turbines, the supply and installation of the cables off- and onshore as well as upgrading an electrical substation.
Hitachi is in charge of manufacturing, assembly and other works related to the offshore wind turbines with downwind rotor.