Wärtsila has been selected to deliver its 50 DF dual-fuel engines propelled by liquefied natural gas (LNG) or conventional diesel fuels to power 16 new gas carrier ships being built in Japan.
Under the contract, the company will deliver 20 nine-cylinder, 25 six-cylinder and 16 eight-cylinder Wärtsilä 50DF dual-fuel engines which will be primarily run on LNG.
The contract marks the entry of the first Wartsila built 50DF engines in Japan’s LNG carrier market.
Wärtsilä Marine Solutions vice-president Lars Anderson said: "We at Wärtsilä have always been at the forefront in making it possible, through our technologies, for LNG to become a viable marine fuel.
"This experience, our unmatched track record in gas propulsion applications, and our well proven dual-fuel solutions are why these contracts were awarded to Wärtsilä."
The Wärtsilä 50DF dual-fuel engines can be fuelled by either natural gas, light fuel oil (LFO), or heavy fuel oil (HFO) and can adapt to any given fuel while operating at the sea.
It functions on a lean-burn principle to enable a high compression ratio, which in turn enhances engine efficiency, reduces peak temperatures while lowering nitrogen oxide (NOx) emissions.
When being propelled by gas, the NOx emissions is reduced to 85% conforming to the current IMO regulations and CO2 emissions reduced to 25%.
It is said to produce negligible sulphur oxide (SOx) and particle emissions.
The engine, while being propelled by gas or fuel, is electronically controlled by an automation system that fosters operability irrespective of the fuel used into the engine.
The 16 vessels, which will be employed mainly in delivering shale gas from the US to Japan, have a gas cargo capacity of between 155,000 and 180,000 cubic metres.
Image: A 6-cylinder in-line version of the Wärtsilä 50DF dual-fuel engine. Photo: courtesy of Wärtsilä.