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    Havyard to construct hybrid battery powered Arctic PSV

    Vessel & ROV News // April 16, 2014

    Havyard has signed a contract for the construction of a Havyard 833 WE ICE platform supply vessel (PSV) with Fafnir Offshore HF.

    The vessel will be designed by Havyard Design and Solutions in Fosnavaag and will be constructed at Havyard Ship Technology's yard in Leirvik in Sogn, Norway. The contract for the vessel has a value of in excess of NKr 350 million. The ship is due to be delivered in July 2015.

    The Havyard 833 WE ICE is a newly-developed design with hull lines that have recently been employed on a smaller PSV design, the Havyard 832 L WE.

    The vessel will be equipped with a hybrid, battery powered diesel-electric propulsion system.

    In a statement, the yard said: "The idea of a hybrid battery diesel-electric propulsion system is the same as for hybrid cars, namely to produce energy as efficiently as possible while also having access to necessary power whenever it is needed.

    "A typical PSV has large variations in energy needs, depending on the operation being carried out... In conventional diesel-electric propulsion systems the load on the diesel generators varies according to changing energy needs. This means that the diesel engines cannot operate at the lowest possible level of fuel consumption.

    "With hybrid battery power you can constantly operate the diesel generators at an optimal level. When energy demands vary you can either charge or discharge the batteries, depending on whether the energy demands are lower or higher than the capacity of the diesel generators in operation.

    "Response time in relation to variation in power demands is also a lot shorter, so there is a quicker transfer of power to the ship's thrusters, which ensures more precise and secure positioning, for example in operations close to a rig."

    The hybrid system for the vessel was developed in close cooperation with Norwegian Electric Systems.


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