New NKK Ship Design Will Reduce Fuel Use By Some 40 Percent

NKK (Nippon Kokan) has developed a new basic ship design promoting greater energy conservation, which will be applied to three vessels (two ore/coal carriers and a bulk carrier) being built for Showa Shipping Company and Nippon Yusen. Shinichi Hirayama, president of NKK America Inc., said these vessels will be used to transport raw material for NKK steel works and are scheduled for completion in 1982.

The new design adopts such energy-saving measures as improved propulsion efficiency and waste heat recovery. NKK says these measures will reduce fuel consumption by some 40 percent on the ore/coal carrier. The vessel will have a propulsion plant that uses the NKK medium-speed PC engine, together with a 9- meter, controllable-pitch propeller.

Another unique feature is the s o - c a l l e d "Shaft-Generator and Motor (SGM)" system that, after supplying the needs of various ship sectors, generates surplus electricity by use of waste heat from the main engine to the motor directly linked to the main shaft for additional propulsion.

The vessel also will be equipped with measures f o r improved waste heat utilization, including a boiler water heating system.

The hull design also will conserve energy in loading and ballasting conditions, and will be coated with an antifouling paint below the waterline to reduce viscous resistance as well as adherence of marine organisms.

Maritime Reporter Magazine, page 17,  Jul 1981 Don Bordelon

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Maritime Reporter

First published in 1881 Maritime Reporter is the world's largest audited circulation publication serving the global maritime industry.