Allseas is equipping its pipelay vessels Solitaire and Audacia with hybrid power technology from Kongsberg Maritime. The offshore company’s multi-purpose vessel Fortitude will undergo the same refit.

Energy storage technology optimises energy and load sharing capability. Batteries store energy when demand is low and deliver it back when demand increases, shaving peaks in power demand. The result is optimal engine loading with improved fuel efficiency and reduced running hours.

The conversion into hybrid vessels underlines Allseas’ commitment to reduce its operational footprint by implementing alternative energy sources that drive fuel efficiency and lead the company into a net-zero future.

‘We are committed to being one of the first offshore energy contractors to operate vessels in hybrid mode during installation and construction activities,’ says Wouter Roelofsen, Sustainability Co-ordinator. ‘The complex nature of our offshore operations requires state-of-the-art DP3 systems powered by a diesel-electric configuration. Hybrid power will reduce our fuel consumption, which translates to significant emissions and cost savings.’

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Future proofing the Allseas fleet

The use of hybrid systems will deliver additional flexibility as Allseas adapts to alternative technologies, allowing for green fuels and future power sources, such as solar or fuel cells. Built-in shore power connections for while the vessels are in port means further emissions reduction will be realised when the infrastructure allows.

Analysis shows that optimised energy efficiency, hybrid power and shore plug-in has the potential to reduce emissions across the Allseas fleet by up to twenty per cent compared with current diesel-electric propulsion.

Allseas multipurpose vessel Fortitude
Allseas’ multi-purpose vessel Fortitude (by Allseas).

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Energy storage solutions

Solitaire, one of the world’s largest and most sophisticated pipelay vessels, will be the first vessel to be fitted with Kongsberg’s PowerAllocator energy storage solution. PowerAllocator allows the engines to run at increased fuel efficiency and enables full flexibility in power system setups. Energy storage is available for spinning reserve and power peak load smoothing for all main redundancy groups in both open and closed bus operation.

Audacia and Fortitude will each be fitted with dual-feed Energy Storage Systems (ESS).

The new systems will be installed in 2023. Hybrid solutions for other vessels in the fleet are under development.

Picture by Allseas.

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