Electrical Repairs Heerema contract for Bakker Sliedrecht Holland’s Bakker Sliedrecht will electrify the crane vessels Thialf and Sleipnir, owned by Holland’s Heerema Marine Contractors, so that they can be powered with green shore power. Wind turbines at the quay of the Caland Kanaal in Rotterdam generate this sustainable energy. The shore power connection allows the vessels to turn off their diesel generators, which significantly reduces noise and CO2, nitrogen, sulphur dioxide and particulate matter emissions. 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 also participating. As part of the project, nine modern wind turbines with a total capacity of 27 MW will replace 10 existing wind turbines on the headland at Rozenburg. Since August, the project consortium has been building a socalled e-house on the quay near the canal. This is a gigantic socket that can supply 20 MW (2 x 10 MW) of green wind energy. The offshore company’s Thialf and Sleipnir are the largest crane vessels in the world. About 400 people can live and work on-board. During the winter period, the crane vessels are regularly moored in the Caland Kanaal 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. That saves the amount of emissions as from 5,000 diesel cars. CO2-emissions into the air are reduced with 15,000 tonnes and the vessels produce hardly any noise. Heerema will reduce its CO2footprint with the project. 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 also expand the existing installations and switchboards and install the low and high voltage cables. The voltage must be converted from 11 kV to 4.16 kV. 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 brandnew, which is why fewer electrical adjustments are required there and the work package is less extensive. Heerema consciously opted for Bakker Sliedrecht. “We have a long-term relationship together. We are Heerema’s preferred supplier and have supplied significant parts and equipment for the crane vessels, varying from switchboards to generators and propulsion systems,” say Project Manager Andy Waterstreet and Account Manager John Hollemans of Bakker Sliedrecht. “Now we are delivering the
The Sleipnir (right) and the Thialf at anchor in the Caland Kanaal near Rotterdam
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Høglund’s Børge Nova
shore supply switchboards on-board so that the crane vessels can actually use the sustainable electricity from shore.” The construction of electrical infrastructure on vessels and land installations is a specialty of Bakker Sliedrecht, whether it concerns high, medium or low voltage. 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.
Remote installation and commissioning of a full system during COVID-19 By Børge Nova, CEO of Høglund Marine Solutions
