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Wartsila has secured a contract to deliver 54 dual fuel engines for the Daewoo Shipbuilding and Marine Engineering (DSME) yard in South Korea.

The engines will be used to power 172,600cbm ice-breaking LNG carriers that are being built for use in arctic conditions to serve the Yamal LNG project in Northern Russia.

While the engine can operate on liquefied natural gas (LNG), heavy-fuel oil (HFO), or low-viscosity marine diesel oil (MDO), LNG will be the primary fuel to be used.

The engine will be capable of operating in temperatures of as low as -50°C on LNG carriers and will be able to break through ice of more than 2m.

The company stated that the total power output from its engines will be 64,350kW per vessel. It will also be operable in modes that allow dramatic variations in engine load within a limited period of time.

“The fitting of Wärtsilä 50DF engines onboard the first LNG carriers in 2006 set a trend in the industry.” 

Wärtsilä will supply 12-cylinder and nine-cylinder Wärtsilä 50DF dual-fuel engines for each LNG carrier.

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These engines are manufactured in various configurations from a six-cylinder in-line version to an 18-cylinder version in V-configuration. They can give 950kW / 975kW per cylinder and a total maximum mechanical output of 17,100kW.

With an engine speed of 500rpm or 514rpm with 50Hz and 60Hz applications, the engine’s maximum thermal efficiency is higher than any other gas engine.

Wärtsilä Ship Power vice-president Lars Anderson said: “This very important order once again emphasises the technical leadership that Wärtsilä has established in dual-fuel engine technology.

“The fitting of Wärtsilä 50DF engines onboard the first LNG carriers in 2006 set a trend in the industry and since that introduction, 65% of all new LNG carriers have been fitted with Wärtsilä dual-fuel engines.

“The strong success of this particular engine over the alternatives is based on its superior propulsion efficiency and the clear environmental advantages that operating on gas allows.”

These ships will be owned by one joint venture between Canada’s Teekay LNG Partners and China LNG Shipping (CLNG), and another joint venture between China Shipping LNG Investment (CSLNG) and Japan’s Mitsui. Wärtsilä’s Korean joint venture company, Wärtsilä Hyundai Engine (WHEC) received the orders in October.

Image: The ice-breaking LNG carriers for the Yamal LNG project will be equipped with Wärtsilä 50DF dual-fuel engines. Photo: courtesy of Wartsila.