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Enova SF is investing NOK 1,15 million in the Grieg Star Group. The cranes on Grieg Star’s ships will soon be able to charge batteries when lowering cargo –in the same way an electric car charges its battery when braking.

– This utilisation of battery technology may very well be the first of its kind in the merchant fleet. In addition to reducing our emissions of CO2, we will be able to contribute to bettering local air quality by reducing our emissions of SOX, NOX and soot particles. A bonus is more effective cranes, reducing time spent in port, CEO Camilla Grieg of Grieg Star says.

Enova consider the project a future beacon for the maritime business:

– We need pilot projects that may trigger more installations onboard the ships. Now Grieg Star takes the lead and shows that new electrical solutions can contribute to reducing emissions and lowering costs, Marketing Director Transportation in Enova Petter Hersleth says.

Kongsberg Maritime is responsible for delivering the system, and has developed the solution together with battery system provider Grenland Energy.

Storing the return power

Even when only using one crane, the effect demanded may be so high that two generators have to run to make sure the power supply is stable, and to avoid speed reductions. Consequently, today the generators run on a disadvantageous low load most of the time, giving high fuel consumption. Project Manager Anders Moseid of Grieg Star is promising more energy effective operations:

– The cranes onboard our ships are producing power when lowering the cargo, much like the dynamo on a bike. With a battery system onboard we are able to store this return power, having it ready for when the cranes are lifting. Since the battery is handling most of the effect peaks, the generators may run on a stable and optimal load all the time, Moseid says.

The system also gives the ships the opportunity to utilise power from ashore if the port are offering this, reducing local pollution even more.

Firm belief in batteries in maritime sector 

The battery system will save over one gigawatt a year for each ship. Grieg Star has ten well-suited ships for installation of this system in their fleet, of which one ship will be a part of the pilot project. Enova believes battery solutions have a great potential in the maritime sector:

– Sea transportation is an important focus area for Enova, as there are huge climate gains to be found in this area. Orders for fully electrical swing cranes are increasing, expanding the potential for battery solutions like the ones Grieg Star is implementing, Hersleth says.

– Our solution has a special usability on board offshore supply ships and ferries, but should be interesting for other kinds of vessels as well. You could install this on electrical driven gantry cranes as well –both at sea and ashore, Moseid in Grieg Star says.

The battery will be installed on board the Grieg Star ship in November, with tests running through April 2016. The battery system is the first high performance optimised battery pack for maritime use, and is developed and produced in Norway. Grenland Energy has received economic support from Innovation Norway to develop the system.



Videos of the cranes in action: