Corvus Energy battery for all-electric tug
Turkish ship designer and builder Navtek Naval Technologies has reported that the Corvus Orca energy storage system (ESS) has been selected for the world’s first battery-powered, all-electric tug.
The growing influence of alternative-fuelled tugs was illustrated recently when highly-regarded Lekko International ran its ‘hybrids and greenies’ update on such tugs with no fewer than 57 vessels listed either delivered or on order globally including: LNG, dual-fuel, hybrid and various combinations of various systems.
This all-electric Navtek NV-712 ZeeTUG (Zero Emissions Electric) will be first such addition to the list and is to be built for GISAS Shipbuilding Industry Co. to operate primarily in Istanbul harbour, Orkun Özek, Navtek’s vice chairman explaining: “The tug is small and will work in a very narrow and tight environment, which is why we opted for a fully electric, battery-powered propulsion system rather than a hybrid solution.”
The 1,500kW capacity Corvus ESS battery will power two Siemens propulsion motors driving a conventional propulsion system through ABB thrusters and drive systems, integrated by Turkey’s BMA Technology. The technical complexity with ‘green tugs’ is demonstrated with involvement of innovative and perhaps not so familiar component and systems manufacturers compared with more traditional conventional tugs involving: designer, builder and main engine and propulsion system provider.
Tommy Sletten, team leader technical sales support at Corvus Energy says: “It has been a pleasure to work with BMA and Navtek on this project. Close collaboration with their knowledgeable teams allowed us to determine the technical solution quickly.”
Corvus Energy has twelve newbuild or retrofit hybrid ferries for clients in Scandinavia, Germany and the Netherlands included in its list of references, not to mention two dual-fuel ferries featuring its ESS for Canadian owners.
Of interest for this column, Corvus Energy systems also feature in seven familiar shiphandling tugs. Kotug’s 2010-built Rotortug RT Adriaan became one of the earliest hybrid tugs seen in western Europe when it was refitted in 2012 including the addition of 12 x 6.5kWh battery packs. In 2014 two newbuild hybrid Rotortugs featuring Corvus ESSs, RT Emotion and RT Evolution joined the Kotug family. A significant increase in battery capacity followed when four newbuild hybrid tugs for Svitzer’s Australian operation specified 82 x 6.5kWh packs for each vessel.
By Peter Barker
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