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A Fitting Conversion

Wärtsilä retrofits German ferry with dual-fuel engines to reduce environmental footprint on sensitive sea area

Posted on July 17, 2013

Wärtsilä received a retrofitting contract to convert the m/v Ostfriesland, a car and passenger ferry owned by Aktien-Gesellschaft “EMS”, so that it can utilize liquefied natural gas (LNG) as fuel.

The vessel will be fitted with two 6-cylinder Wärtsilä 20DF dual-fuel generating sets and a Wärtsilä LNGPac, which comprises onboard liquid natural gas bunkering, storage tanks and handling equipment with related safety and automation systems.

The dual-fuel engines will run primarily on LNG as the main fuel with the capacity to switch to conventional liquid fuels if necessary. The scope of supply also includes Wärtsilä’s cold recovery system, which utilizes the latent heat of LNG in air conditioning systems, thus reducing the amount of electricity consumed in cooling compressors.

The vessel sails between Emden and Borkum Island on the Lower Saxon Wadden Sea National Park, an ecologically sensitive UNESCO World Heritage listed area in the southeastern part of the North Sea, and the retrofit will reduce the ship’s environmental impact, Wärtsilä said.

The contract was signed in April 2013. The retrofitting will be carried out during the second quarter of 2014 and is expected to be completed in about seven weeks. The contract is for the German shipyard, BVT - Brenn - und Verformungstechnik Bremen GmbH.