Wärtsilä’s unique vessel designs are based on its industry-leading experience in the development of dual-fuel marine engines and LNG fuel supply systems. As the world of shipping prepares for a future in which LNG is the marine fuel of choice, Wärtsilä is ready to support that future with the most fuel-efficient technologies on the market.
Wärtsilä launched four new container feeder vessel designs at this year's Nor-Shipping exhibition in Oslo. Their innovative designs are based upon achieving optimal fuel efficiency, as well as compliance with all known current and future environmental regulations.
“Fuel flexibility is key to our latest designs, along with fuel efficiency, optimised cargo capacity and the lowest possible emission levels,” says Jacob Høgh Thygesen, Director Merchant Solutions, Wärtsilä Ship Design Thygesen. “As feeder vessels typically operate in coastal areas – many of which are designated ECAs (Emissions Control Areas) or SECAs (Sulphur Emissions Control Areas) – environmentally compliant designs are crucial.”
Thygesen says the exceptional fuel performance of Wärtsilä’s vessel designs is the result of a number of factors. Firstly, Wärtsilä has many years’ experience creating marine engines and propulsion systems that offer unrivalled fuel efficiency.
“As a designer of everything from propulsion systems to electrical and automation systems and gas systems, we’re uniquely positioned to develop the most efficient vessel designs on the market,” says Thygesen. “By integrating all these systems into the original design, we can optimise the entire vessel from the outset.”
Hydrodynamics is another key feature that impacts fuel efficiency.
“Hull lines are crucial to efficiency,” says Thygesen. “We spent a great deal of time on the hull lines for the Aframax, to get them exactly right. This is one of the reasons why this vessel offers the best fuel consumption on the market at 35.2 tonnes a day.”
Wärtsilä has also sought to optimise the aerodynamics of its vessels, especially reducing wind resistance on the superstructure on deck. This has led to a considerable reduction in fuel consumption.
More than 4,000 vessels have already been built using Wärtsilä-owned ship designs, including many of the world’s most advanced LNG-powered ships. In order to achieve the right balance between functionality and new-build cost, design solutions need to be tailored to the specific needs of the owner.
“We talk to every customer about the specific operating profile of his or her vessel. What parameters does it need to fulfil? Which ports will it be calling at and what size restrictions does it have to comply with? How often will it have access to fuel? Based on this information, we can advise on the best configurations, including the number of fuel tanks, their size and positioning, to ensure that the vessel is both stable and optimally utilised,” says Thygesen.
Introducing Wärtsilä’s four new ship designs
- Wärtsilä’s four new ship designs are the WSD80 1400 DF, WSD80 2300 DF, WSD80 3800 DF, all of which are dual-fuel container feeder vessels in different sizes, and the WSD84 2400 DF, which is a dual-fuel RoRo vessel already under construction in the U.S.
- Each design is available in three versions; “conventional”, which uses HFO as fuel; “environmental”, which runs on HFO with exhaust cleaning scrubber systems; and “clean”, which is optimised for dual-fuel and operates primarily on LNG
- In their dual-fuel modes, these ships have the capacity to carry 1,400, 2,300, 3,800 and 2,400 TEU respectively