2017 Sep 08

Deltamarin reveals Viking Line newbuild’s groundbreaking energy savings

Viking Line’s new LNG newbuild beats Viking Grace in energy efficiency despite being 10% bigger – and its designer opened up to Passenger Ship Technology about why.

Deltamarin has designed Viking Line’s new LNG-fuelled newbuild and has inked a contract with Xiamen Shipbuilding for engineering and construction support services.

And Deltamarin rose to the challenge: the newbuild will be 10% bigger than Viking Grace – carrying an extra 300 tonnes of cargo – and have several megawatts more of power, yet still be 10% more fuel efficient on the same route as Viking Grace.

Deltamarin’s sales manager Nina Savijoki commented that there were several ways Deltamarin achieved this “huge improvement”.

“Viking Line had lot of ideas about how to change and improve the design and Deltamarin studied several different alternatives to improve the concept,” Ms Savijoki said.

The three main areas worked on were:

  • Weight: The structure of the hull was analysed carefully to achieve a low weight solution and the weight was reduced further by using low weight materials, for example in insulation.
  • An extensive hullform development programme using CFD simulation will ensure the vessel will be energy efficient, not only on the design speed but on a large speed range which the vessel uses in its daily transits.
  • Engineroom configuration simulation.

Ms Savijoki said “We ran our energy simulation tool again and again over the operation profile on the route Turku–Stockholm and created a very detailed understanding of the energy needs to streamline the engineroom configuration of the vessel. Deltamarin also used the same tool to support the owner to select the correct types of heat and cold recovery systems for the route.”

Indeed, the energy simulation tool was launched by Deltamarin in Q2 this year and was the result of a long development process. It can be used for various purposes, for instance to compare different engineroom configurations on the same operational profile to see which are beneficial and which are not as streamlined as they could be.

“It really gives us an edge; we look at how many engines are needed at certain times on the route and how much excess heat is created. It is really quite a complex set of calculations that are easily manipulated through our mathematical simulation tool.” said Ms Savijoki.


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