Gas engines ordered for ‘green’ ferry

03 Mar 2011
Wärtsilä’s 50DF engine has been chosen for the largest LNG-fuelled passenger ferry to date

Wärtsilä’s 50DF engine has been chosen for the largest LNG-fuelled passenger ferry to date

Wärtsilä has been contracted to supply the propulsion machinery to STX Finland for the new environmentally-friendly passenger ferry being built for Finnish operator Viking Line.

Wärtsilä's scope of supply includes four 8L50DF main engines, the transverse bow and stern tunnel thrusters, and two stainless steel fixed pitch, built-up main propellers with complete propeller shaft lines and environmentally sound shaft line seal systems. The propellers are designed with the lowest possible pressure impulses to control noise and vibration. This makes the ship the largest passenger ferry to operate on LNG. The agreement includes an option for the supply of equipment to a similar sister ship. STX Finland is part of the international STX Europe Group.

Use of LNG as fuel means that SOx emissions will be almost zero, and NOx emissions will be at least 80% below the current IMO stipulated level. Particulate emissions are reduced by more than 90%, while CO2 emissions are some 20%-30% lower. The ferry will operate between Turku and Stockholm.

"This unique and groundbreaking vessel will be the most environmentally sound large passenger ferry in the world. Thanks to Wärtsilä's technology, this ship will meet and even exceed the most stringent known future IMO and EU environmental regulations for maritime applications. Wärtsilä's long experience and strong competence in dual-fuel technology, with some 300 such engines already sold, was an important reason for Wärtsilä being awarded this order," says Tony Öhman, senior vice president, marine operations & newbuilding, Viking Line.

The new ferry will be capable of carrying cars, trucks and road trailers on short international voyages. It is also designed to carry 2800 passengers and 200 crew members. The machinery, equipment and outfitting, as well as the structural work, will be under the special survey of Lloyd’s Register of Shipping.