Page 59: of Maritime Reporter Magazine (November 2021)

TECH FEATURE COATINGS with SPC antifouling coatings, had an average speed loss of 6.4

It’s All in the Detail

A good way to understand and demonstrate the impact of percent. Across the ? eet, the average daily fuel consumption of a vessel was 70 tons per day, with an overall activity level of 70 hull coatings on fuel ef? ciency is with a comparative per- percent. With an average bunker cost of $500 per ton over the formance analysis on the propulsion ef? ciency of a num- ber of vessels in the same ? eet. Hempel recently performed 60-month period, Hempaguard X7 provided accumulated sav- such a study using a ? eet of 20 tankers. Seven tankers were ings of $6.7 million on each vessel it was applied.

coated with Hempaguard X7 hull coating: the others with

Transiting to a Sustainable Shipping

SPC antifouling coatings. From the results, it was clear that

Landscape

Hempaguard X7 delivered signi? cantly higher savings in

It is clear that the obligation to lower emissions will fall fuel consumption and associated emissions.

Good quality and high-density data were available for all largely at the foot of shipowners, operators and managers. the tankers, enabling accurate hull and propeller analyses. While this is of course challenging, Hempel wants to see shipping reach its emissions reduction targets and this is one

The ISO 19030 standard was followed, and its ‘in-service per- formance’ indicator was quanti? ed in terms of speed loss in reason behind its decision to join the Getting to Zero Coali- percent for all the tankers over a full-service interval of 60 tion. The partnership, between the Global Maritime Forum,

Friends of Ocean Action, and the World Economic Forum, months. It is worth noting that some of the ships received un- derwater hull cleaning in order to rectify under performance, seeks ways to get commercially viable zero-emission ships sailing by 2030. Through such global initiatives, as well as but the ISO 19030 standard’s ‘in-service performance’ indica- our range of products, and crucially through our data-driven tor does not exclude the effect of a hull cleaning.

The performance analysis of the ? eet showed that the seven SHAPE analysis tool, Hempel will continue to support ship- vessels coated with Hempaguard X7 had an average speed loss owners, operators and managers as we make the transition to a of 1.3 percent over 60 months. The 13 other vessels, all coated sustainable shipping landscape, one regulation at a time.

Hull coatingIn-service perfor- Fuel increase* %Fuel savings % mance/speed loss %

Hempaguard X7 1.3 3.9 15

SPC antifouling 6.4 19.2 -

The in-service speed loss and relative fuel savings of the hull coatings compared to the lowest performing coating. *Assuming a 1:3 relationship between speed and fuel. www.marinelink.com 59

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