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Power and automation technology group, ABB, has announced that it will supply the power, propulsion and energy storage solution for "two of the most innovative vessels operating in the offshore oil and gas sector".

The specialized vessels require an advanced propulsion and power generation system to perform its operation. ABB claims its new Azipod D propulsion system will help the vessels "safely achieve millimeter precision at open sea".

The Azipod D is the latest generation ABB podded electric propulsion system. The vessels will each feature two 4.2 megawatt units. A hybrid cooling system using a combination of direct seawater cooling and internal air cooling is expected to increase electric motor performance by up to 45 percent.

ABB says the Azipod units will have a "substantial impact" on the fuel efficiency of the ships. Manoeuvrability and station-keeping will be important for the two offshore vessels, thus the Azipod propulsor's 360 degree steerable propeller is said to be "ideal" for the requirements of ABB's client.

The Onboard DC Grid will cut fuel consumption by up to 27 percent, ABB claims. It allows the ships' four 3600-kilowatt (kW) generators, also supplied by ABB, to operate at variable and optimum speed. The vessels are also equipped with batteries, which will further optimize use of the power plant and reduce energy consumption.

"The solutions we are providing will make these ships incredibly flexible and efficient to operate," remarked Juha Koskela, Managing Director of BU Marine and Ports. "The Azipod D, Onboard DC Grid and energy storage are cutting edge technologies which match the demanding conditions often experienced in the offshore sector."

The two ships will also be equipped with ABB's Remote Diagnostic Service. This system will connect the vessels to ABB's shoreside technical support centres where the technicians can monitor the performance of the vessel and ensure necessary support.

The vessels were designed by Norway-based Cefront Technology and are to be built by China Ocean Shipping (Group) Company (COSCO).

Image: ABB's Azipod D propulsion system.