Wärtsilä’s 6-cylinder Wärtsilä 34DF dual-fuel (DF) engines will be integrated into three large new escort tugs, with a customized gas storage and supply system, contracted by Norwegian operator Østensjø Rederi. The equipment is expected to be delivered during 1H 2016
The tugs will operate primarily on LNG (Liquefied Natural Gas) but the Wärtsilä DF engines provide the flexibility to select the most suitable fuel according to availability, price and local environmental restrictions.
The overall LNG system, which incorporates Wärtsilä's unique LNGPac fuel system, a fully integrated gas handling system, and the Wärtsilä Gas Valve Unit, has been specially designed by Wärtsilä to accommodate the need for a compact solution.
"These are trend setting tugs in that they provide environmental sustainability through the use of LNG fuel. At the same time, the flexibility of the dual-fuel engine technology also ensures a high level of operational security since the switch from gas to diesel can be made at any time without loss of speed or power," say Carl Johan Amundsen, project manager at Østensjø Rederi.
The vessels are designed to have a bollard pull of 100 tons, and will operate at Statoil's Melkøya terminal near Hammerfest, Norway.
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