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Friday, December 11, 2020 

Bakker Sliedrecht is to electrify crane vessels 'Thialf' and 'Sleipnir' of Heerema Marine Contractors so that they can be powered with green shore power supplied by wind turbines at the quay of the Calandkanaal in Rotterdam.

The electrification of the vessels is part of a shore power project, in which, in addition to Heerema, power company Eneco, the Port of Rotterdam Authority and the City of Rotterdam are participating. As part of the project, nine wind turbines with a total capacity of 27MW will replace 10 existing wind turbines on the headland at Rozenburg.

Heerema’s Thialf and Sleipnir are the largest crane vessels in the world. During the winter period, the crane vessels are regularly moored in the Calandkanaal in Rotterdam, for maintenance or in preparation of projects at sea. Then all on board facilities are powered by diesel generators. By connecting the ships to sustainable shore power from the new e-house, they can be turned off. CO2-emissions into the air are reduced by 15,000t and the vessels produce hardly any noise.

In order to use this sustainable shore power, Bakker Sliedrecht is carrying out various adjustments on board. Bakker Sliedrecht will, among other things, supply the required transformers, shore connection switchboards and interface to the existing power distribution system. Bakker Sliedrecht will expand the existing installations and switchboards and install the low and high voltage cables. The voltage must be converted from 11kV to 4.16kV. All new equipment will be installed on board the Thialf early next year. After that the work at the Sleipnir will start. That crane vessel is brand-new, which is why fewer electrical adjustments are required there and the work package is less extensive.

Bakker Sliedrecht is Heerema’s preferred supplier and has supplied significant parts and equipment for the crane vessels, varying from switchboards to generators and also propulsion systems. Construction of electrical infrastructure on vessels and land installations is a specialty of Bakker Sliedrecht. In addition to Heerema’s crane vessels, more ships and companies in the port of Rotterdam will be able to use the sustainable shore power in the future. In these projects Bakker Sliedrecht can also play a part.

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