Ultra large container ships

英文Ultra large container ships

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The size of container vessels has been dramatically increasing in recent years, exploiting the advantages resulting from the economy of scale. The MAERSK ELBA with beam 48.2m (17 rows in hold and 19 rows on deck) has capacity of 13,100TEU and weights over 43,000t. The CMA CGM MARCO POLO has beam 53.6m and capacity of 16,000TEU. In June 2013 Maersk Line’s first 18,270TEU Triple-E containership was delivered by the Daewoo Shipbuilding and Marine Engineering shipyard at Okpo. Currently, the largest container vessels on order are of 18,400 TEU in size. One two-stroke diesel engine Wärtsilä 12RTA96C, 68,640kW at 102 rpm, six-bladed FP propeller of 8555mm diameter. While in the past the selected design speed has been approximately 25 knots and higher, lately the preferred design speed has been reduced to 23-24 knots, and even lover. The dual engine installation of Triple-E vessels is intended to ensure a top speed of 23kts, 2 knots less than that of the 15,500TEU EMMA MAERSK. Despite of the 16% increase in payload, the power requirement is in the order of 65,000-70,000kW, some 19% less than 80,000kW, single–engine installation in EMMA MAERSK



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