Havila Kystruten, the new Norwegian operator that will be taking on some of the routes operated by Hurtigruten in 2021, has selected the power and propulsion packages for its four newbuildings. Under the contract announced this week, Rolls-Royce Commercial Marine will provide power and propulsion for all four ships.
A month ago, Havila Kystruten announced that the four ships of Havyard 923 design will be built in Spain and Turkey with Astillero Hijos de J. Barreras shipyard in Spain and Turkey’s Tersan yard winning two each.
Rolls-Royce will provide a fully integrated LNG power and propulsion solution to all four ships. This includes two LNG fuel tanks with process system, and control and safety systems, four Bergen gas engines, main propulsion thrusters of type Azipull with Permanent Magnet (PM) drive motor, PM tunnel thrusters, and stabilisers of type Neptune 200.
The main propulsion thrusters with integrated PM motors are developed in close cooperation with ship designers, to ensure optimal integration with the hull. The energy efficient tunnel thrusters allow for a slimmer hull shape due to their narrow design, which fits well with the project’s overarching goal of energy efficiency and low emissions. The low noise and vibration levels of the PM tunnel thrusters combined with the roll damping effect of the stabilisers, will benefit the comfort of both passengers and crew.
The LNG Fuel System from Rolls-Royce will supply Bergen gas generator sets. Each vessel will have two engines with nine in-line cylinders, and two with six cylinders. The engines can operate on variable speed to reduce both fuel consumption and emissions. The Bergen engines series is in operation across a range of vessel types today, including cargo vessels, PSVs and tugs as well as passenger vessels. Two separate LNG fuel systems are designed in cooperation with the ship owner and include flexibility to bunker both tanks from the same side of the ship, as well as the option to supply the front and aft machine rooms from both tanks. This ensures high redundancy and flexibility during operation.
Steinar Oppedal, Technical Product Manager for LNG Fuel Systems, Rolls-Royce – Commercial Marine said: “Havila Kystruten has chosen a LNG fuel system that builds on our long experience with these type of systems, designed to be robust and reliable in rough weather conditions. No less important is the fact that the system and its engines will provide a significant reduction in emissions compared to conventional diesel engines.”