A Canadian laker with a sophisticated Berg diesel electrical drive practice is already displaying important emissions reductions. Constructed by China’s Chengxi Shipyard for Canada Steamship Line (CSL) the 26,000 dwt self-unloader, M/V Nukumi arrived in Halifax, Nova Scotia, in time to take up duties for the 2022 Nice Lakes season. As we reported earlier, the vessel is a single level loader developed in collaboration with Windsor Salt to ship de-icing salt from Mines Seleine on the Magdalens Islands to be used on roads throughout Quebec and Newfoundland.
It’s the first bulk provider to function direct drive electrical — an built-in resolution developed by Berg Propulsion to make excessive effectivity electrical propulsion simpler to undertake.
“Standard electrical propulsion programs feed energy from the generator to the facility distribution system, then on to the frequency controller and the electrical motor earlier than they attain the principle propeller shaft through the discount gear,” mentioned Jonas Nyberg, managing director, West, at Berg Propulsion. “This may be overly complicated and onerous to keep up, whereas vitality is misplaced at each step. The direct drive electrical resolution options electrical motors which are built-in to immediately drive the propeller shaft.”
The removing of gears permits for shorter shaft traces, fewer bearings and a smaller engine room footprint, whereas very excessive torque meant the identical energy may drive bigger propellers, in keeping with Nyberg.
“For Nukumi, the usage of direct drive electrical propulsion reveals the worth obtainable when a shipowner, an gear maker and a system integrator work collectively within the early ship design section on prioritizing efficiency and sustainability,” says Nyberg. “This can be a key reference for direct drive electrical as a gasoline environment friendly and simple to put in know-how which broadens the attraction of greener electrical propulsion.”
Frederic Jauvin, vice-president, international technical providers, CSL mentioned that, in comparison with its predecessor, the ship’s mixture of optimized hull kind, electrical propulsion know-how and Tier III diesel-electric engines would lower greenhouse gases by 25 p.c and different pollution by 80 p.c. The propulsion resolution may also improve maneuverability within the shallow Magdalen Island channel, he mentioned.
“Nukumi charts new waters relating to protected, sustainable and environment friendly delivery within the Gulf of St. Lawrence and Nice Lakes area,” mentioned Jauvin. “Its effectivity and sustainability are really thrilling and Berg Propulsion’s built-in resolution and its engineering partnership with Chengxi Shipyard has been key to securing the entire obtainable efficiency enhancements.”
The efficiency and sustainability features of electrical propulsion are extensively acknowledged, particularly when ships demand variable load capabilities, however Berg believes the larger simplicity direct drive options carry to the marine market may show decisive.
Berg says that vitality financial savings in comparison with different electrical options could be within the extra of 5%, with equal gasoline financial savings obtainable. Moreover, direct drive electrical can be “future-proofed” to accommodate different vitality sources, utilizing a DC hub — or “superdrive” — to attract on foremost engines or saved vitality from zero emission batteries and gasoline cells, as required.