Tier-III compliant gas engines chosen for LNG carriers

09 Sep 2010
The IMO Tier-III compliant Wärtsilä 50DF engine features propulsion efficiency, low fuel consumption, and significant operating cost savings

The IMO Tier-III compliant Wärtsilä 50DF engine features propulsion efficiency, low fuel consumption, and significant operating cost savings

Wärtsilä reports that it has been selected to supply a gas propulsion solution, involving four dual-fuel engines per ship, for a series of new LNG carriers to be built at the Samsung Heavy Industries yard in South Korea.

Wärtsilä says that the choice of its gas engines is indicative of the current emphasis by owners on the latest technology, and a growing environmental commitment to reducing fuel consumption and lowering emissions. By installing the DF engines, the ships will be capable of meeting IMO Tier 3 emission requirements.

Each vessel will be powered by three V-12-cylinder Wärtsilä 50DF and one six-cylinder in-line Wärtsilä 50DF engine. The scope of supply also includes a Wärtsilä UNIC C3 control system for each ship.

The engines will be manufactured by Wärtsilä-Hyundai Engine Company, the South Korean joint venture company owned by Wärtsilä and Hyundai Heavy Industries. Delivery of the engines and other Wärtsilä equipment will begin during the first quarter of 2012, and the first ship is scheduled to be delivered in 2013.

The Wärtsilä 50DF engine is used in 36 gas carrier ships currently in operation, and further engines for 20 more vessels are awaiting delivery. The company says that the 50DF has already accumulated more than 1 million hours of running time in the marine market.

The engines can be efficiently operated on natural gas, heavy fuel oil (HFO), biofuels, marine diesel oil (MDO), or in fuel sharing mode. The same lube oil can be used regardless of the type of fuel. When operating on gas, emissions from the engines are minimised and this will allow the vessel to meet the IMO Tier 3 standard without the use of secondary equipment, such as exhaust gas recirculation (EGR) or selective catalytic reduction (SCR) units.

Wärtsilä considers that this newbuilding order represents a further step towards the recovery of the shipping market.

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