January 2016 Marine Log

Page 23

POWER & PROPULSION Norway’s Kleven Verft has contracts to build more than 15 vessels valued at over $1.37 billion

POWERING UP your choices New power and propulsion options unveiled at the Workboat Show Compiled by Marine Log Staff Caterpillar is supplying Cat 3516 main engines and MTA 524-T azimuthing thrusters for two Harley Marine tugs


he International Workboat Show in New Orleans, LA, offers the marine industry an ideal time to not only assess the current state of the industry, but also an opportunity to view some of the newest technologies, products, and services. With stricter emissions regulations coming into play in 2016 and operators strongly focused on efficiency and the bottom line, this year’s show saw a number of new power and propulsion technologies unveiled. GE Marine, for example, extended its EPA Tier 4 engine series to include 16- and 12-cylinder V-models, an 8-cylinder inline model, and a 6-cylinder inline model that is currently planned for development. GE says the engine series meets the Environmental Protection Agency’s (EPA) Tier 4 emission standards without the use of urea after-treatment, while maintaining fuel efficiency and service intervals. In addition, the engines have a faster response time to load steps, and a Maximum Continuous Rating (MCR) that is 12 percent higher than their Tier 3 compliant predecessors. Coastal tug and barge operator Reinauer Transportation purchased two 12V250MDC Tier 4 diesel engines for its new Articulated Tug Barge (ATB) unit under construction at Senesco Marine in Kingstown, RI. One of the engines was displayed at GE’s booth at the Workboat Show. “We chose the new GE Marine engines because we like their robust design and component configuration,” says Christian Reinauer. “The engine closely matches the footprint of our current vessel design. This limits the amount of re-engineering while meeting Tier 4 emissions requirements without the complications of urea after-treatment.”

GE’s Marine Product Manager Rob Van Solingen says the engines offer several advantages as compared with engines that use an SCRbased emission control system. He says that the GE Tier 4 engines are less complex, allowing ship designers to develop engine rooms that make the most efficient use of space. This reduction in complexity also translates into improved labor efficiency at shipyards. The engines also offer space and weight savings, since there is no large SCR reactor system in the exhaust piping of each engine nor any urea tank, dosing equipment, etc. required.

New Engine From MAN Also on display at the WorkBoat Show was a new inline six-cylinder diesel engine range for workboats, ferries, fishing trawlers, and pilot boats based on the MAN D2672 diesel engine from MAN Engines. Offered in a range of outputs from 323 kW to 588 kW (440 to 800 hp), the basic six-cylinder engine has been proven in a wide range of on- and off-road machinery since it was first introduced in 2007. The common rail injection system used in the D2676 ensures high mean pressures and optimized combustion. This increases on-board comfort due to reduced vibration and noise emissions. The inclusion of a Miller or Atkinson camshaft has helped to achieve an average 10% reduction in fuel consumption compared to the engine’s predecessors.

Scania Makes In Roads Scania has been making inroads in the marine propulsion sector because of its compact, proven engine platforms. Some recent January 2016 MARINE LOG 21