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Leanships project with Wärtsilä, MARIN, and Grimaldi achieves 3.5% fuel savings for ships with CPPs

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Dry Bulk,

The technology group Wärtsilä, Netherlands based Maritime Research Institute MARIN, and Italian ship owner Grimaldi have together designed an ‘Energy Saving Device’ (ESD), suitable for use by ships with controllable pitch propellers (CPPs).

Following model tests, and subsequent sea trials with Grimaldi’s ‘Grande Portogallo’, a 165 m long Pure Car & Truck Carrier, fuel efficiency gains of 3.5% were confirmed. This translates into a pay-back period of only 1.3 years. Grimaldi concluded that the initial noon reports suggest a 5% decrease in the fuel consumption, but in order to get a more realistic value we need to record a wider range of data.

The work was carried out as part of the LeanShips project, under the European Union’s Horizon 2020 framework project for research and innovation. LeanShips aims at demonstrating the effectiveness and reliability of technologies that offer energy savings and emission reductions on a large scale. The result of the development work is a pre-swirl Stator, an energy saving solution, that for the first time ever was demonstrated to be suitable for use with CPPs. LeanShips was a four-year project and was completed in April 2019.

“This represents a major breakthrough in making ships with controllable pitch propellers more efficient, and therefore less polluting. We have earlier established some energy savings for ships with controllable pitch propellers, and now this new technology has been extended in line with the objectives of the LeanShips project,” says Dario Bocchetti, Corporate Energy Saving Manager, Grimaldi Group.

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