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Propulsion Annual Containerships: When Will One Engine Not Be Enough? There is certainly no let-up yet in the containership ordering spree as charter rates scale new heights, carriers contin- ue to report record results. The Howe Robinson Container Charter Index has climbed to a new record of 1588.4. up by just over 252% since its January 2002 low point of 451. Records are being broken on a weekly basis as liner companies extend their investment pro- grams, ordering new and ever larger ships many of which will not now deliv- er until 2007 or 2008. Among leading lines believed to be contracting or at least discussing new tonnage in recent days are CMA CGM. Evergreen, Mitsui OSK and Orient Overseas Container Line. The French line is believed to have ordered another four panamax vessels at Hyundai Heavy Industries whilst Orient Overseas is thought to have booked four 4300 teu units at Samsung in Korea. Meanwhile Evergreen is reported to be in discus- sions with various Far Eastern builders including China Shipbuilding and Mitsubishi Heavy Industries about pos- sible new tonnage and is also consider- ing increasing the size of some eight vessels it already has on order at Samsung. According to newbuilding statistics, both Mediterranean Shipping Company (MSC) and China Shipping have 9.200 TEU ships on order: MSC has nine such units under construction at Samsung, with delivery dates extending between August next year and April 2007 while China Shipping has three 9200 teu ships due to deliver in 2006 and five 9,580 TEU vessels scheduled to be commis- sioned during the first half of 2007, all from Samsung. However, as container ships become larger and faster and newbuilding prices continue to rise, there is concern amongst some analysts about their eco- nomics. Ultimately the quest for economies of scale will come to a dead ... as container ships become larger and faster and newbuilding prices continue to rise, there is concern about their economics. end. they reason, as the largest vessels will only be able to call on a handful of megaports with appropriate back-up infrastructure. In the same way, the own- ers of such vessels would have only a handful of ship repair facilities to choose from and presumably such yards could charge for their services accordingly. Already some construction yards are working on designs for vessels in the 10-12,000 teu range and some designers are even talking of so-called "Malacca-max" units that could have double the capacity of some of the largest container units under construc- tion today. So far as the economics are concerned, there are issues both afloat and ashore. Under the present construction stan- dards of ISO containers, for example, it is not safe to load more than nine high and therefore giant container carriers must become broader and/or longer. This has an impact on maneuverability in access channels as well as berth space in the terminals themselves. Meanwhile the issue of propulsion units, the required diameter of propellers and the threat of cavitation become crit- ical factors. Today's largest vessels are approaching the power limits of single engines driving single propellers. If con- tainer vessels get much larger, they will have to have twin propulsion units driv- ing twin propellers and, although faster, there will be a price to pay both in terms of first cost and fuel consumption over a ship's lifetime. Perhaps the most worrying aspect of today's container boom, however, is the fact that ships are already subject to some delays as congested ports in some areas simply cannot cope. And with the fleet expanding at the current rate, observers are worried that port hold-ups will simply get worse. That makes ship- ping less efficient, leads to longer transit times and ultimately drives up costs. AquaMarine Engineering Company Aquamarine Engineering Company has concentrated on the use of Titanium in these shell-and-tube heat exchangers. The result is a design that effectively eliminates Galvanic Corrosion. We can equip your machinery with Titanium Heat Exchangers designed as "Drop-in" units for engines that include EMD, Caterpillar, Yanmar, Cummins and Detroit Diesel. FV Otoshiro Maru_750 ton bonita pole boat freezes fish with "Blue Ice" ammonia chiller using Lo-fin titanium tubes. Tl-Hex JACKET WATER COOLER ON CATERPILLER 3508 MAIN GENERATOR Lo-fin TITANIUM TUBES WITH 38% INCREASED SURFACE AREA PER LINEAL FOOT, PLUS THE UNIQUE INTERNAL PROFILE THAT INCREASES BOTH FLUID TURBULENCE AND HEAT TRANSFER Contact: Aquamarine Engineering Company P.O. Box 83495 San Diego, California 92138 Tele/Fax: 619-498-3899 Email: Shimizu717@aol.com AquaMarine Engineering Company HAS BEEN SUPPLYING TITANIUM SHELL- AND-TUBE HEAT EXCHANGERS FOR 10 YEARS. THEY HAVE PERFORMED AS MAIN AND AUXILIARY FRESH WATER COOLERS, HYDRAULIC OIL COOLERS, REFRIGERTION CONDENSERS AND BRINE CHILLERS ON 186 SHIPS IN 19 COUNTRIES. 52 Circle 244 on Reader Service Card Maritime Reporter & Engineering News
