Engines for first LNG OSV under US flag

09 Oct 2011
Wärtsilä dual-fuel technology for new US PSVs

Wärtsilä dual-fuel technology for new US PSVs

Wärtsilä says that it is to deliver an integrated propulsion system based on the use of LNG for two offshore support vessels for operation in the Gulf of Mexico. These will be the first LNG-fuelled US-flagged OSVs.

The two advanced platform supply vessels will be owned by Harvey Gulf International Marine. The contract includes options for supplying propulsion equipment for additional follow-on vessels.

Wärtsilä’s scope of supply is for the dual-fuel machinery, an electrical and automation package, complete propulsion, the LNG fuel storage and handling components, in an integrated package. The ships, to the STX Marine SV310DF design, will be powered by six-cylinder 34DF dual-fuel engines. The LNG storage capacity of 290m3 enables more than a week of vessel operational time. In addition, the vessels will carry 5,520dwt at load line and have a transit speed of 13 knots. The vessels are scheduled for delivery in two years and will operate in the Gulf of Mexico.

Shane Guidry, Harvey Gulf International Marine's chairman and CEO, states that the stringent governmental demands for reduced emissions, together with predictions that availability of ultra-low sulphur diesel fuel will be restricted, caused the company to consider the use of gas as fuel. "We're committed to bringing the world's best technologies to our customers, and these vessels with Wärtsilä's integrated system based on the use of LNG further demonstrates Harvey Gulf's Going Green Vision," he says.

Pete Jacobs, business development manager, offshore at Wärtsilä North America adds: "It's a pleasure to work with a company such as Harvey Gulf whose management is dedicated to introducing advanced, clean, natural gas supply vessels. These modern supply vessels showcase Wärtsilä's leading position as a complete solutions provider of LNG propulsion with electric drive systems."

"We are witnessing a transformation of the marine industry as it charts a course towards a new era for natural gas. It's exciting for Wärtsilä to be a trusted partner in this launch with industry leader Harvey Gulf, whose natural gas supply vessel investment actions of today signal a coming paradigm shift. This is aimed at capturing operational savings while simultaneously reducing emissions," says John Hatley, vice president ship power, Wärtsilä North America.

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