JAN DE NUL ORDERS NEXT GENERATION INSTALLATION VESSEL – LES ALIZES

Just six months after the investment announcement for the offshore installation vessel Voltaire, Jan De Nul Group orders Les Alizés, a floating installation crane vessel from the CMHI Haimen shipyard in China.
Together with the Voltaire, this new vessel will be in a super-size class of its own, capable of building the newest generation of offshore wind farms. Les Alizés, that will be ready in 2022, is equipped with a crane having a lifting capacity of 5,000 tons and equally impressive lifting heights.
Les Alizés will mainly be used for the construction of offshore wind farms, but with her impressive crane she is also extremely suitable for decommissioning offshore oil and gas platforms.
Thanks to her dimensions and impressive lifting and loading capacities, Les Alizés will be able to load out, transport and install multiple units of the largest and heaviest wind turbine foundations. In addition, as a crane vessel that floats, it will be able to install heavier and larger foundations into deeper waters and in more challenging seabed conditions.
This vessel investment is a response to the global trend within the offshore wind energy sector to design and install increasingly larger wind turbines. This new generation of turbine can be more than 270 metres high, with blades up to 120 metres long and sit on foundations up to 2,500 tonnes. The offshore installation vessels currently available on the market are experiencing great difficulties in installing these new turbines and their heavier foundations, with their enormous dimensions and installation weights.
The vessel will be built at a shipyard of China Merchants Industry Holdings Co. Ltd., located in Haimen, Nantong City, China. As a subsidiary of China Merchants Group, this shipyard has a proven track record in supplying marine and offshore facilities which gives Jan De Nul Group sufficient confidence to award this contract to CMIH.
Les Alizés is specifically designed for loading, transporting, lifting and installing offshore wind turbine foundations. The main features are a main crane of 5,000 tons, a deck loading capacity of 61,000 tons and a deck space of 9,300 m². With these characteristics, Les Alizés can easily transport the heavier future foundations, several in one trip, to the offshore installation site, with direct benefits in planning, fuel consumption and emissions reduction.
The latest generation of Jan De Nul’s vessels is equipped with an exhaust gas filtering technology that complies with the strict European EURO STAGE V guidelines for emissions on land and inland waterways. So it will be for Les Alizés. The Offshore Installation Crane Vessel is named after the French word ‘alizé’, which means ‘trade wind’. Trade winds are regular winds in the intertropical regions (between 23°27 north and 23°27 south), blowing from east to west.
(Source and image: Jean De Nul)