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Incorporating Clean Shipping International

JAN DE NUL JACKUP TO USE SCHOTTEL PROPULSION

Thursday, October 24, 2019 

Jan De Nul Group’s new Offshore Jack-Up Installation Vessel (JUV) 'Voltaire' – built at COSCO Shipyard in Qidong, China – will be powered by propulsion solutions from Schottel

The four rudderpropellers and two transverse thrusters will ensure optimal propulsion efficiency as well as maximum manoeuvrability. With a payload of approximately 14,000 tonnes and a crane capacity of over 3,000 tonnes, the JUV will be able to support the renewable energy industry in building future wind farms at sea.

Philippe Hutse, Offshore Director at Jan De Nul Group said: "Upon delivery of the JUV in 2022, we will be capable of efficiently installing the next generation of offshore wind turbine generators and foundations. As we move toward this, Schottel’s crucial expertise is of great advantage."

The JUV is powered by electric motors driving the Schottel azimuth thrusters. Four Schottel Rudderpropellers type SRP 610 FP with an input power of 3,000kW each and a propeller diameter of 3.30m are installed at the stern. When combined with the forward thruster setup, which includes two Schottel Transverse Thrusters type STT 7 FP (2,600kW each and a propeller diameter of 2.80m), the result is optimal manoeuvrability and full dynamic positioning to DP 2 standards. The Voltaire will be able to achieve a maximum speed of 11.5 knots.

The new JUV will be environmentally compliant thanks to the on-board integration of the same advanced emission control technology found on other ultra-low emission vessels in the Jan De Nul fleet. In this respect, the latest vessel will be equipped with the DNV-GL type-approved Schottel Leacon system, complying with VGP regulations and considered to be a non-oil-to-water interface. Due to separate seals on the seawater side and on the gearbox side, the sealing system ensures that, in case of leakage, seawater entering the system or gear oil escaping from the system are collected in an intermediate chamber. This prevents water from entering the gearbox and, of even greater importance, oil from escaping into the seawater.

The 169.3m long and 60.0m wide Voltaire is designed to transport, lift and install offshore wind turbines, transition pieces and foundations. Compared to Jan De Nul Group’s two other jack-up vessels, Voltaire has almost double the deck space. The Voltaire is set to be delivered in 2022.

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