Helping design reduced-ballast tankers

"These new designs are not only suitable for some of China’s silt-laden water ports, but can significantly reduce energy consumption while in ballast condition…to bring competitive advantages to owners." Mr Yu Fengping, DSIC President


Working closely with Dalian Shipbuilding Industry Co. Ltd (DSIC) and Dalian Ocean Shipping Co., we helped them create new tanker designs that reduce ballast water requirements by 40%.

The range of benefits

Named ‘Clear Advantage’ and ready to be built, the designs provide substantial performance improvements over conventional tanker designs. The benefits are reductions in energy consumption during ballast passages; a reduction in ballast water treatment capacity and the associated time, energy and cost penalties incurred in treating ballast water; and a reduction in the harmful effects of mud or silt.

This last benefit is key for ship operators on China’s major rivers, where mud and silt are significant operational hazards. Intake of river water ballast during cargo discharge can result in substantial volumes of mud or silt accumulating after operations, leading to as much as 1,000 tonnes becoming ‘stuck’ in a VLCC’s ballast water tanks.

The combined impact of the loss of cargo capacity, the economic drain of transporting the mud during laden passages and the eventual cost of removing the muddy slurry – as well as the strain on ballast water treatment systems – have all been reduced in the Clear Advantage designs.