Page 24: of Maritime Reporter Magazine (July 2015)

MARITIME POWER product development drives growth,” said Rosengren. “If you look at Wart-

Wärtsilä 31 IMO Tier II or III sila today, we would not be where we are today without a lot of good inno-

Cylinder bore 310 mm Fuel speci? cation: Fuel oil vations which were done a number of

Piston stroke 430 mm 700 cSt/50°C 7200 sR1/100°F

Cylinder output Diesel 610 kW/cyl ISO 8217, category ISO-F-RMK700 years ago.”

Cylinder output Dual-Fuel, Pure Gas 550 kW/cyl ISO-F-DMA, ISO-F-DMB, ISO-F-DMZ,

Part of this innovation is, of course,

Mean effective pressure Diesel 30.1 bar ULSF the introduction last month of the world

Mean effective pressure Diesel 30.1 bar Gas: Methane number > 80 record breaking Wärtsilä 31.

Mean effective pressure Dual-Fuel, Pure Gas 27.2 bar “The whole development process for

Piston speed 10.75 m/s SFOC 165 g/kWh at ISO conditions this engine was different than any that we have done before. It is building on the digitalization in the design phase.

You can design an engine today, digital-

Engine Weight ly, before you build it,” said Rosengren.

Platform A* A B C F (tons) “What we have done in this phase is we tested components and single cylinder

Wärtsilä 8V31 6180 5585 3205 3100 1500 56 modules for thousands of hours before

Wärtsilä 10V31 6820 6225 3205 3100 1500 62 we built the engine. This is totally new

Wärtsilä 12V31 7500 6905 2550 3400 1500 71 for us. When we were con? dent, we put

Wärtsilä 14V31 8140 7545 2550 3400 1500 77 the engine together and then for the last

Wärtsilä 16V31 8780 8185 2550 3400 1500 85 two years we’ve been testing it more than ever before. It’s a new way to de- sign and build and engine. Reliability 24 Maritime Reporter & Engineering News • JULY 2015

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