Dual Fuel Guide Ship for S.Korea

By Keith Henderson at April 19, 2012 08:00
Filed Under: Company News

In a new application for the growing number of vessels, large and small using dual fuel engines, Samsung Heavy Industries (SHI), Republic of Korea has designed a 200 GT Guide ship for the Port of Incheon Authority. The specification for the new vessel placed environmental sustainability as a priority. Samsung is well known for their expertise in the construction of large LNG carriers however this commission represents a first in design of a dual fuel vessel of this size.

Caption The Port of Incheon Guideship has a Wärtsilä duel fuel engine and will operate on LNG
as main fuel to reduce exhaust emissions to below Tier III levels.
Image Credit: Samsung

The Guide ship has an LOA of 115 ft (38 m), beam of 26 ft (8 m) and draft of 7.2 ft (2.2 m) and will have a service speed of about 15 kn. It will be operating in the Port of Incheon at the mouth of the Han River and its duties include taking passengers onboard for various routings. When operating on LNG it will be compliant with Tier III exhaust emission regulations providing a low environmental impact.

The propulsion system selected is a medium speed Wärtsilä 9L20DF with an output of 1,584 kW at 1,200 rpm. Based on the Wärtsilä 20 diesel engine introduced in the early 1990s, the Wärtsilä 20DF series dual-fuel engine can run on either natural gas (LNG), marine diesel oil (MDO), or heavy fuel oil (HFO). Fuel can be switched from gas to MDO/HFO and vice versa during operation without power interruption. When running on LNG as the main fuel, a very small amount of diesel fuel is still consumed as it is required to be injected into the cylinder to initiate combustion of the gas.

Caption Wärtsilä 9L20DF with cutaway showing piston and connecting rod 
is rated at 1,584 kW at 1,200 rpm
Image Credit Wärtsilä

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