UASC, HHI, FutureShip Team Up for New Containerships

MarineLink.com
Friday, October 04, 2013
Photo: UASC

United Arab Shipping Company (UASC) have recently announced they will expand their fleet with new super-efficient container vessels. Constructed to DNV class, the designs have been optimized through a productive cooperation between FutureShip and Hyundai Heavy Industry (HHI). Setting its sights on competitive slot cost, UASC, one of the world’s fastest growing container carriers, has ordered five 14,000TEU vessels with six options and five 18,000TEU vessels with one option.

Recognizing that fuel consumption is an important factor in determining the profitability of new vessels, UASC partnered with FutureShip, design consultancy and energy efficiency experts, to realize the most efficient design possible. A number of designs were assessed based on their total costs of transport per container-mile for UASC’s specific trading pattern, taking into account both capital investment and operational costs.

Four sets of designs were shortlisted for intensive evaluation by FutureShip with numerical tank towing tests based on Computational Fluid Dynamics (CFD) simulations for the ship with propeller. In four weeks, FutureShip ran thousands of tests to determine the speed-power relationship for the two ship classes at two drafts for each of the four competing designs, adding up to some 1.7 million CPU hours, or 200 CPU years. The use of massively parallel computation allowed multiple tests to be run at the same time, over speed and draft ranges which reflected realistic operational profiles.

The four designs were all well matched, with HHI’s design emerging as the winner due to a 14,000TEU vessel design that outperformed the competition and the most efficient (single-skeg) vessel design at 18,000TEU. Taking these leading designs as the starting point, UASC, HHI and FutureShip joined forces to further optimize the designs. A formal parametric optimization was also conducted to fine-tune vessel performance for UASC’s operating profile in the intended service pattern of the ships.

FutureShip’s dedicated parametric optimization employed more than 60 free parameters with the objective of reducing fuel consumption as much as possible, taking into account hydrodynamic power requirements, the specific fuel oil consumption of the respective engines and UASC’s specific operational profile for speed-draft combinations.

In a joint effort, HHI and FutureShip revisited the powering concept and more than 35,000 hull shape variants were investigated for each hull design. As a result, better performance could be achieved for both the 14,000TEU and the 18,000TEU vessels compared to the initial proposal.

For final validation, professional model tests were conducted at the Hamburg Ship Model Basin. The model tests backed up FutureShip’s CFD predictions, supporting the accuracy of the optimization results.

To realize further efficiency gains on the operational side, UASC also decided to implement FutureShip’s award winning trim solution, “ECO-Assistant.” Backed up with a comprehensive database of possible operational conditions evaluated by CFD analysis, this tool provides an intuitive interface to select the most efficient trim for every voyage.

The new ship designs are currently being finalized at HHI with deliveries scheduled between 2014 and 2016, including all options.

gl-group.com
 

Maritime Reporter August 2013 Digital Edition
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