NYK has proudly unveiled Japan’s first fully battery-driven work vessel, officially named the “e-Crea.” The name, pronounced like the French pastry “éclair,” was chosen for its visual resemblance to the sweet treat, reflecting its sleek and innovative design, reports NYK.
Key Features
The vessel boasts two primary innovative features:
- Fully Electric Propulsion: The “e-Crea” is powered exclusively by batteries, which are charged from shore facilities at Keihin Dock’s Koyasu Shipyard. This fully electric system ensures the vessel operates without emitting any carbon dioxide, contributing to cleaner maritime operations. Additionally, its electric propulsion makes it significantly quieter than conventional fossil-fuel-powered ships, substantially reducing operational noise.
- Compact Design: Measuring approximately nine meters in length, the “e-Crea” features a highly efficient and compact hull design that consolidates all essential equipment. This compact form factor provides exceptional maneuverability, particularly in confined spaces, making it ideally suited for assisting with docking operations and general vessel movement within shipyards.
Technical Challenges
The integration of the electric propulsion system into the “e-Crea” presented specific engineering challenges, particularly concerning weight management and temperature control, both of which were successfully addressed.
- Weight Increase and Hull Balance: The installation of the electric propulsion system, including substantial battery modules within the hull, resulted in the vessel’s weight exceeding initial projections. To ensure proper hull balance and maintain safe, stable navigation, the engineering team undertook a meticulous reconfiguration of equipment placement and cabling, thereby optimizing the internal space.
- Temperature Management: Elevated temperatures generated by the batteries and electric motors posed potential fire risks. To effectively mitigate this, the team implemented comprehensive multi-layered water-cooling systems alongside integrated air ducts. Furthermore, the battery room received specific enhancements, including robust fireproofing measures and protection against hazardous gases, coupled with improved ventilation. These combined measures were critical in ensuring the vessel adheres to rigorous safety standards.
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Source: NYK
