Slow steaming has been long touted as a vital component in meeting Carbon Intensity Indicator (CII) requirements, a benefit that leading broker Clarksons has largely refuted following research by its green transition team.
Clarksons claims its green transition team of analysts has conducted “break-through analysis revealing many of the traditional methodologies relied upon for strategy making are far from accurate. Amongst its findings, the specially created team has concluded that the effect of speed reductions in improving a ship’s CII ratings are grossly overestimated.
Lead analyst for the team, Jon Leonhardsen explains “The reason for the misconception is that calculations are based on textbook speed-consumption curves which have an exponential growth across an entire speed range. However, if you factor in all of the consumers of a ship and the variables of real-world sailing conditions, the curve becomes less exponential (or flatter) at lower speeds.”
Kenneth Tveter concludes “This means that the marginal fuel-saving for distance sailed becomes lower, and this is ultimately what matters for CII performance. So, whilst some ships are needing to slow down significantly to comply, for others speed reduction isn’t viable at all and other costly measures and improvements need to be done. In summary, imprecise understanding of the relationship between speed and CII can create a false impression of the CII improvement toolbox.”
To assist, the Green Transition team has launched a new CII Assessment Modelling Tool that, in some instances, has proven to be 30% more accurate than traditional modelling methodologies in predicting real-world fuel consumption, and CII, especially at lower speeds.
The tool, developed with Clarksons proprietary statistical methodology, is already helping clients to overcome potential under and overestimation of sailing speed potential, meaning they can achieve greater confidence in ship speed potential and value, and maximise utilisation and value of existing fleet for as long as possible.
Whilst the Introduction of CII in January wasn’t a surprise to the shipping industry, it has been met with mixed reaction and many ship operators do not have plans in place for effective management. Clarksons says it welcomes the introduction of measures that will help to ensure the industry can become greener and reduce its overall contribution to CO2 emissions.
Source:
Hong Kong Maritime Hub
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