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Example arrangement for a twin screw ship

greener fuels and the use of electric engines. Additionally, the smarter use of the existing transport capacity is investigated.

Reducing emissions and fuel consumption The preliminary investigation focuses on three points: Firstly, MARIN will review existing knowledge with regards to resistance reduction and improvement of propulsion efficiency, gained in earlier (and running) research and projects at MARIN. Opportunities to reduce emissions and fuel consumption will be identified, both for new ships and for retrofitting. Secondly, MARIN will explore energy configurations for inland ships and identify options for newbuilds, retrofitting and for the transition phase. For this, MARIN will cooperate with the Inland Shipping Expertise and Innovation Centre (EICB) and the Innovation Lab in Rotterdam. And finally, the ship’s performance and energy consumption are modelled with the round-trip simulation programme Gulliver.

Operational performance analysis Gulliver will be used to analyse and illustrate the operational performance of the combination hull, propeller, engine and proposed energy configurations for various inland ship types. These simulations will be performed for existing ships (with existing propulsion configurations) and for retrofitted ships with improvements identified in the preliminary research mentioned above. The next step is to perform simulations for new

ship concept designs with new energy configurations.

At the moment we are further improving Gulliver to take additional aspects into account. This includes water depth, water currents and ship loading conditions, but also typical inland fairway conditions such as the slope of the river (an inland ship is actually going uphill when navigating into the hinterland) and restrictions in the width of rivers.

Finally, the aim is to explore aspects such as the essential (land-based) energy infrastructure and requirements to the ship’s energy configuration on different trajectories. These outcomes will be discussed with the government and the industry and will determine the approach for 2019.

Concept designs of inland ships MARIN will develop concept designs for inland ships of several standard dimensions (inland ships are grouped in classes by their main dimensions). Each design will include a hull form, propeller(s), appendages and will incorporate newly proposed energy configurations. These hull forms will be optimised to take into account the different spatial requirements of the new configurations, compared to conventional diesel-driven propulsion. The designs will then be made available for the industry. Therefore, the participation of the industry is a precondition in order to realise “fitness

for use”, and MARIN will initiate user groups for consulting the industry immediately after agreement with the Ministry about the plans for 2019.

Energy storage and propulsion configurations MARIN will also develop new energy storage and propulsion configurations for inland ships. These will be based on the research our Hydro- Systems Integration group performs in the Zero Emission Lab (see article on page 26).

Total cost of ownership By integrating the results of the previous steps in a business case per viable concept design, the different alternatives can be compared regarding different cost aspects and, for example, on the pay-back period or total cost of ownership. These business cases will be made available to provide the industry with the information to select its preferred concept design, based on its specific requirements.

With this ambitious project, comprising a knowledge review, simulation and industry consulting, MARIN aims to develop the knowledge needed to aid the inland shipping sector in the transition towards emission-free transport.

1 Presentation “Strategie energietransitie Binnenvaart”, Ad van Ommen. Ministry I&W, May 31, 2018

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