The first of two new wind turbine installation vessels (WTIVs) under construction at the China Merchants Heavy Industry (Jiangsu) Co shipyard for Norway’s OHT ASA will feature a Wärtsilä integrated propulsion and dynamic positioning thruster solution, including the engines, a Wärtsilä NOx reducer emission abatement system along with steerable and tunnel thrusters to deliver optimum performance for vessel dynamic positioning.
The GustoMSC NG-14000XL-G design jack-up vessel is customized for offshore wind turbine and XL monopile foundation installations. It will be fitted with a telescopic crane with a maximum capacity of 2,500t and a maximum lifting height of approximately 165 meters.
The compact design of the Wärtsilä thrusters is an important benefit since the weight of all onboard equipment can be critical for a jack-up vessel. The lightweight Wärtsilä thruster package meets this requirement while delivering excellent station-keeping capability.
“There is rapid growth in demand for the installation of offshore wind turbines, and the vessels designed to carry out this construction work need to be state-of-the-art. The same applies to the propulsion solutions because reliable and efficient dynamic positioning is essential in all sea conditions. The full scope of Wärtsilä solutions will provide the operational and environmental performance demanded for the next-generation market,” says Torben Mikkelsen, OHT’s Newbuild Project Manager.
“The aim is always to provide optimal propulsion performance for efficient vessel operations, and the advanced range of Wärtsilä solutions selected for this ship will do just that. By enabling efficient free sailing and outstanding dynamic positioning, we are at the same time contributing to the decarbonization of shipping,” says Dirk Folchert, Senior Sales Manager, Wärtsilä Marine Power.
The Wärtsilä scope includes four Wärtsilä 32 and two Wärtsilä 20 engines, the Wärtsilä NOx reducer (NOR) system, five steerable thrusters and one Wärtsilä tunnel thruster. Delivery to the yard will take place during the first half of 2022. The ship is expected to be delivered during the second quarter of 2023.
Effective station-keeping is enhanced by the thrusters’ proven retractable system, which has an energy efficient 8-degree tilting feature. This reduces the power need and, therefore, also fuel consumption. The thrusters also deliver thrust that can be up to 23% more effective than non-tilted units. The Wärtsilä steerable thrusters feature a modern electric steering system to provide higher redundancy, reliability, and a lower lifecycle cost.