Niigata Engine for LNG Tug in Japan

December 4, 2014 in Dual Fuel, LNG, Marine by Rich Piellisch  |  No Comments

Medium-Speed 28AHX-DF for Boat by Keihin Dock, Says ClassNK

The design of a new medium-speed dual fuel engine by Niigata Power Systems has been approved by ClassNK, the Tokyo-based classification society reports, noting that the engine is slated to be used on a new liquefied natural gas-fueled tugboat being built by Keihin Dock for the NYK Line.


NYK Line said late last year that its new LNG-dual fuel tug would be Japan’s first-ever non-carrier LNG vessel (HHP Insight, December 26, 2013).


The new 28AHX-DF dual fuel engine by Niigata Power Systems is to be used on an LNG-fueled tugboat being built by Keihin Dock for NYK, says ClassNK

The new 28AHX-DF dual fuel engine by Niigata Power Systems.

Niigata’s 28AHX-DF has a maximum rated power per cylinder of 320 kilowatts (430 horsepower). Technologies used in the new engine were developed with the support of Japan’s Ministry of Land, Infrastructure, Transportation & Tourism, ClassNK says, as well as part of the society’s Joint R&D for Industry Program.

‘Demand for Dual Fuel Engines is Increasing’

“The demand for dual-fuel engines is increasing as IMO restrictions tighten and the industry recognizes the importance of environmental accountability,” ClassNK machinery department GM Yukihisa Shibata said in a release.

“Supporting the development of such low-emission engines is one way we can help ship operators and manufacturers practically address the challenges of these new regulations, and encourage the wide spread use of this new technology,” Shibata said.

With the exception of LNG carriers, the Keihin Dock for NYK tug will be Japan’s first LNG-fueled vessel.

another view of Niigata Power's new 28AHX-DF dual-fuel engine

another view of the 28AHX-DF

Full Approval by Year-End?

High costs associated with low sulfur fuels, and the increasing availability of LNG “is driving both vessel owners and machinery manufacturers to consider the use of LNG as a vessel fuel,” ClassNK says.

Full approval of the engine is expected this month, ClassNK says.

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Source: ClassNK with HHP Insight follow-up

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