Finnish naval architects Deltamarin have unveiled a new container feeder design that is claimed to maximise cargo capacity, operational flexibility and fuel economy.
Development of the A.Delta2300 was supported by AVIC Weihai Shipyard in terms of construction friendliness, and has been reviewed and commented on by DNV GL considering the application of the latest rules and industry practices.
The blueprint provides a container capacity of 2,322 TEU in five cargo holds and on deck. The increased cargo hold breadth improves stability in the fully laden condition. Together with the ballast-free approach, this results in an increased utilisation rate of about 73% (1,700 TEU) of nominal container intake in the homogeneous loading condition at scantling draught carrying a 14t TEU container. Furthermore, intake can be optimised to a specific cargo profile and even further improved by considering route-specific loading.
The design allows pallet-wide container stowage as well as three tiers of high cube containers in the cargo hold without losing container slots. Additionally, a high number of reefer plugs allows smart stowage and the reduction of unnecessary container movements. These features provide efficient and fluent stowage, which reduces time and costs.
Another design objective was a low-resistance hull form. Achieving this entailed performing dozens of CFD calculations and three series of model tests at the Hamburg Ship Model Basin (HSVA). As a result, Deltmarin says the vessel requires only low power at the design speed compared to present reference designs.
The daily main engine fuel oil consumption is decreased to 42 t/day at a 19kt service speed, which translates to a fuel efficiency of 0.033 t/TEU/day. A strikingly low deadweight per TEU ratio of less than 16 DWT/14t TEU is thus achieved, which is commonly gained only in larger container ships. This cuts the vessel's EEDI (Energy Efficiency Design Index) to 37% below the IMO reference line complying with Phase 3, which enters into force in 2025.
Optional features of the A.Delta2300 include LNG readiness, a flexible number of reefer plugs, shaft generator PTO/PTI, scrubber/SCR implementation and gearless design as well as several ice classes. Furthermore, stretched derivative designs are available, the A.Delta2500 and A.Delta2600.
"The efficiency and flexibility of this design provides the owners and operators with a solution for future transportation needs," said Deltamarin sales director Vesa Hamarila.