Page 31: of Offshore Engineer Magazine (Mar/Apr 2023)

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ffshore wind farms continue their march To reduce weight, and, therefore the power required for into deeper water, further from shore, with propulsion and jacking, the Cadeler vessels will feature a turbines that can now reach more than 270 mixed medium and high-speed engine concept from MAN meters high with blades 120 meters long. De- Energy Solutions that optimizes the power/weight ratio,

O signers and OEMs are pushing effciency to minimizes engine room and funnel footprint, and achieves new levels to contain OPEX on the new-generation jack- a total weight of around 200 tons, a signifcant reduction. up WTIVs taking them up there. The mix includes a frameless version of its medium-speed

Danish ship design frm Knud E. Hansen has chosen 32/44CR engine.

specialization for its Atlas A-class WTIV, a smaller deriva- WTIVs have distinctly different operating modes (load- tion of its massive C-class design. This smaller vessel will ing, sailing, DP, jacking, and installation), and Halvor Øk- assemble turbines on pre-installed foundations. The expec- land, Offshore Sales, Global Sales & Marketing, at Kongs- tation is that the expanding industry footprint can support berg Maritime, says integrated systems, including winches, this more specialized vessel. electrical systems, and control systems on the bridge, save

Texas-based Bleutec Industries has taken the idea further space and reduce weight. by delegating tasks to both a piling installation vessel and He says: “WTIVs need to lift the complete weight of service operation vessels – which will provide accommo- the vessel for every installation sequence, so it’s crucial to dation that would otherwise have added to the WTIV’s optimize the weight and balance it forward and aft while payload. The company’s WTIV-Light is focused solely on at the same time ensuring DP, sailing, and maneuvering installing turbines of up to 22MW. capability is kept to the highest standard.”

In contrast, Danish installation frm Cadeler is creating Kongsberg Maritime is delivering electrical packages to economies of scale with larger vessels that will make fewer the four Cadeler vessels, Dominion Energy’s Charybdis, transits out to installation sites. Its two X-class and two F- and Maersk Supply Service’s Maersk Sturgeon. class WTIVs, currently under construction, will be able to Kongsberg Maritime’s integrated control and electrical transport and install seven complete 15MW turbine sets or system delivers synthesized data from both consumers and fve sets of 20+MW turbines. power producers, including feed forward signals from DP

Kongsberg Maritime is delivering electrical packages to

Dominion Energy’s Charybdis.

Dominion Energy

MARCH/APRIL 2023 OFFSHORE ENGINEER 31