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Tue 9 May 2017, 10:03 GMT

DFDS ships to improve efficiency with ABB technology


ABB shaft generators to be installed on two DFDS ro-ro vessels.

ABB says its shaft generators will be used to raise the energy efficiency on two DFDS vessels that have been designed to meet the latest environmental regulations.

Two shaft generators will be installed in each of the cargo ro-ro ships, allowing the main engines to operate at a wider, more optimal speed range. The shaft generator system takes its power from main engines, thereby increasing safety if there is a failure on the auxiliary engine. The ships' main engines will also be turbocharged by ABB's latest generation technology.

Juha Koskela, Managing Director of ABB's Marine and Ports business, said: "Efficiency and safety are cornerstones of the maritime industry and our shaft generators will introduce both to these DFDS vessels. Not only is this an environmentally friendly technology but it is also very cost effective."

By using an alternative power source, the shaft generators are designed to allow the main engines and the propeller pitch to be optimized no matter what the vessel speed, adding the load on the main engine and improving overall fuel efficiency. The system will be tailored for the vessels that operate in DFDS's North Sea network.

The shaft generator system also enables the vessel to be sensitive to the local community and environment when it reaches port as it is compatible with shore-to-ship power. This allows the ship to shut down its auxiliary engines when it berths, therefore reducing emissions and vibrations.

Two high-performance A270-L turbochargers for two-stroke engines were selected for each vessel, reducing fuel and consequently lowering emissions further.

For the typical demands of low-speed marine engines, the turbochargers are designed to offer greater engine operating flexibility: high pressure tuning for part or low loads; and designed for best efficiency in slow-, and ultra-slow steaming.

The two 6,700-lane-meter ro-ro vessels - the largest ever freight vessels to be built for DFDS - will be built by Jinling Shipyard in China for delivery at the beginning of 2019, with an option of a further four vessels.

ABB   Denmark 
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