With the aid of sophisticated software and virtual sea trials, the three partners were able to analyse the proposed trading pattern of the ships and optimise accordingly. In this case, the ships will operate at speeds typically ranging from 15 to 19.5 knots but with a maximum speed of about 23 knots. Traditionally container ships spend much of their time operating at ‘off-design’ conditions which increase hull resistance and reduce propeller and engine efficiency. The first of the new 13,800 TEU ships is under construction at Hyundai Heavy Industries (HHI) and will be delivered next year. The installed propulsive power could be reduced by about 16 per cent compared to the initial hullform optimized for one draft & speed condition. The design has been optimized for an operating profile along the Far East to Europe trade route involving nine speed and draught combinations. The new hull design will will make APL’s 10 new ultra large container ships some 20 per cent more fuel efficient per TEU compared with existing designs says DNV. A collaboration between APL, Hyundai Heavy Industries and DNV will make APL's new ships more fuel-efficient.
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