The Daewoo Shipbuilding and Marine Engineering (DSME) yard in South Korea has ordered a total of 54 Wärtsilä dual fuel engines to power 172,600 cbm icebreaking LNG carriers being built for use in arctic conditions to serve the Yamal LNG project in Northern Russia. For each carrier Wärtsilä will supply 12-cylinder and 9-cylinder Wärtsilä 50DF engines. The total power output from the engines is 64,350 kW per vessel.
“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 propulsion efficiency and the clear environmental advantages that operating on gas allows,” said Lars Anderson, Vice President, Wärtsilä Ship Power.
The Wärtsilä machinery is capable of operating on LNG, HFO, or low-viscosity MDO but LNG will be the main type of fuel to be used. When operating in arctic waters the engines will be operating in ambient temperatures of as much as minus 50 degrees Celsius on LNG carriers breaking through ice more than two meters thick, in operating modes that allow dramatic variations in engine load within a limited period of time.
The Arc 7 design ships will be owned by one joint venture between Teekay LNG Partners of Canada and China LNG Shipping (CLNG), and another joint venture between China Shipping LNG Investment Co. Ltd. (CSLNG) and Japan based Mitsui O.S.K. The order for engines was placed with Wärtsilä’s Korean joint venture company, Wärtsilä Hyundai Engine Co., (WHEC) in October.