Page 41: of Maritime Reporter Magazine (September 2016)

NYK Blue Jay 14,000 TEU Ship Features Propulsion “World First”

The Winterthur Gas & Diesel Ltd. 8 cylinder X92 engine on the test bed.

Photo: NYK

Photo: Winterthur Gas & Diesel Ltd.

The advanced propulsion concept tem and the ship hull. The capabil- their engines either with a low or a “The X82B has the biggest rat- includes a narrow dimensioned ity to run lower engine speed fos- high maximum power output, fur- ing ? eld on the market. From a engine room allowing a hull design ters the higher ef? ciency of larger ther improving fuel consumption in manufacutirng POV it makes no with exceptional hydrodynamic ef? - propellers. We took account of this each operating mode without ma- difference, but from an engineer- ciency. And of course the central at- in the engine design, like the Wärt- jor modi? cations.” ing point of view and a design POV traction is theWärtsilä brand Gen- silä X82 used in the NYK Blue Jay, The basis of the dual-rating fea- it makes a difference. You need to eration X two-stroke diesel engine, by employing higher stroke-to-bore ture of the X engines is WinGD’s study the different forces at the dif- the 9-cylinder Wärtsilä X82. ratios than in their predecessors. ‘? ex’ system of electronically con- ferent load points on the engine,

Speci? cally designed and devel- This not only facilitates the larger, trolled fuel injection and exhaust expeciallly the bearing train system oped by WinGD to meet ship own- slower turning propellers but also valve actuation, combined with to be capable to absorb these high ers’ demands for the lowest total gives higher engine internal ef? - turbochargers with very wide com- powers at diff. engine rotations cost of ownership (TCO), the Gen- ciency.” pressor maps. The sophisticated and speeds. That’s a more design eration X diesel and dual-fuel en- fuel injection and valve timing sys- issue.”

Dual-Rating gines are conceived for maximized tems developed by WinGD allows “To change the rating of the en- vessel payloads combined with low As for the dual rating fearture of the engine to be optimized for two gine you need to modify the turbo- fuel consumption and emissions the Wärtsilä X82 Holtbecker said; different vessel operating pro? les charger insides,” said Stiefel. “So and for rational, economic produc- “As we have seen in the recent based primarily on changes of en- you would need to open the tur- tion by WinGD’s licensees. past, ship owners wish to be able gine system settings. The owner bocharger and exchange the noz- “A holistic approach was taken to respond to market conditions thus has a tool to easily adapt the zle ring. It takes a few hours. You when designing the Generation X by having closer control over the vessel speed for different market would also adjust the compression engines,” said Rudolf Holtbecker, fuel costs of their ships. In recent conditions, always ensuring the op- ratio of the engine by adjusting the

General Manager, Business & Appli- years this has led to owners operat- eration with the best possible per- lengths of the piston rod. A small cation Development. “It is designed ing their ships at lower speeds with formance and economy. mechanical modi? cation, which to enable total vessel ef? ciency to engines running below their design “You need an engine with an ex- altogether can be accomplished in be optimized by a careful combi- ratings. With the X engines, the traordinarily big rating ? eld to be one or two days in a port. The rest nation of main engine parameters dual-rating option has been intro- able to offer the bene? t with the would be some electronic control and ef? ciency, the propulsion sys- duced to allow ship owners to use dual rating,” said Stiefel. modi? cations.” www.marinelink.com 41

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