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Wärtsilä manufactured the LNG engines for the Megastar

Wärtsilä is a listed international company specialised in different power plants, with its headquarters in Helsinki. The company also manufactures the modern and highly environmentally-friendly LNG engines for the Megastar.

The Megastar will have a total of five Wärtsilä 50DF engines, of which three will be V12 engines, and two will be 6-cylinder engines. The engines are manufactured at Wärtsilä’s factory in Trieste, Italy. The engine capacity is influenced by wind direction, schedules, and ice conditions, for example.

With the help of different types of engines, the capacity can be optimised as required. The small engines function as a type of adjustment units alongside the big ones. The task of the engineer officer is to assess which engines should be used at any given moment,” said Mika Ojutkangas, Wärtsilä Marine Solutions GM.

With the use of LNG, the ship’s emissions that strain the environment will be considerably reduced. Exhaust fumes from Wärtsilä’s 50DF engine contain hardly any nitric oxides, which are particularly harmful regarding the eutrophication of the Baltic Sea, for example.

According to calculations done in Norway, the nitric oxide emissions of a 95-metre diesel vessel, compared to the emissions of a LNG vessel, correspond to removing 20 000 passenger cars from traffic.

Carbon dioxide emissions will also be reduced by about 25-30%. The nuisance of port towns, sulphur and small particles, will also be absent,” said Ojutkangas.

Familiar technology

There is a lot of familiar technology in LNG engines. The main components of the engines, such as the blocks and connecting rods, are the same in LNG and diesel engines. The difference is in the fuel injection equipment, as well as the optimisation of the combustion chamber, because the operating mechanisms of the diesel and the LNG ignition engine technology are different. The Megastar’s engines are Dual Fuel engines, so marine diesel can also be used if the gas system has malfunctioned.

The Megastar’s LNG system represents the newest technology in this industry. The control systems and the sensors of the new engines in particular will give more specific information about the performance of the engines.

With these, the engines will be operating more optimally than previous models. Nature will be happy when the combustion process is optimised even more precisely than before.

Safety first

LNG is liquefied natural gas, with a refuelling temperature of about -150 degrees. Gas often has dangerous associations in people’s minds. Ojutkangas has a reassuring response to this discussion.

The LNG mixture that goes into the engine does not catch fire under normal air pressure. To ignite, it would need considerable heat and pressure. Cargo ships have been using LNG for about 50 years, and even passenger ships for about 15 years. The LNG systems have been designed to be at least as safe as the current diesel fuel systems, in every way.

Gallery ( 7 photos)

Tags:  CSR, Environment, LNG

9 responses

Dinesh Subramaniam / 

Hello,
Dinesh here from Wärtsilä’s Communications & Branding team.
Can we share this article on our social media channels, and also place it on Smarp, our employee advocacy platform?
Thank you.

 / 

Hello and sorry for the late reply! Of course you can share the article on your channels, no problem with that! Br, Hanne / Tallink Suomi

Hans Kruger / 

Which company supplied the LNG tanks for the Megastar? Chart Ferox from Czech Republic? Thank you for sharing the information.

 / 

Hello Hans! There are two supplier company´s, Skangas in Finland and AS Eesti Gaas in Estonia. Best regards, Miia / Tallink Suomi

Hans Kruger / 

By the way, great to see you preserving the Baltic Sea region by using clean LNG. May the others follow soon.

Hans Kruger / 

Thank you. I asked for the manufacturer of the tanks, not for the supplier of LNG.

 / 

Yes, sorry my mistake. So the tanks become from Sweden, manufacturer is Linde Group CRYO. Br, Miia / Tallink Suomi

Herman / 

Hi, Are you filling LNG with passagers onboard?

 / 

Hello Herman! Megastar has multiple departures during the day and has only an hour at a time in the harbour. In that hour previous passengers must exit and new passengers to come onboard. Tanks are also filled within that one hour in the harbour so it is very possible there are some passengers onboard when filling the tanks! Best Regards, Tiia / Tallink Suomi

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