Illustration: "© DNV / Making Waves"
Nothing much has happened in the shipping industry over the last 30-40 years. It is basically the same ship design and same fuel. Vessels burn more than 370 million tons of oil annually, resulting in emissions greater than the total emissions from the entire African continent. Due to increased consumption emissions are expected to increase by nearly 40 percent from 1.2 billion tonnes (2007) to 2 billion tonnes in 2015.
But, thanks to the development of a new crude oil tanker concept – "Triality", by Det Norske Veritas(DNV) we are looking at a major step towards the new environmental ear for tanker shipping. “Triality” is fuelled by liquefied natural gas (LNG), has a hull shape that removes the need for ballast water and will almost eliminate local air pollution.
Less harm to the environment
By using LNG instead of bunker oil, carbon dioxide emissions will be reduced by 34%, nitrogen oxide (NOx) by 84% and sulfur oxide (SOx) by 94%, and use 25% less energy than conventional vessels.
No need for ballast water
A traditional tanker in unloaded transit needs ballast water to obtain full propeller immersion and sufficient forward draft to avoid bottom slamming. The new V-shaped hull form and cargo tank arrangements completely eliminate the need for ballast water.
Profitable
Although an additional capital expenditure of 10-15% is expected for a Triality VLCC newbuilding compared to a traditional VLCC, the estimated life cycle cost is expected to be 25 % lower than than the newbuilding cost for a traditional VLCC.
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