Rolls-Royce’s vice president for the merchant sector in Europe, Børge Nogva, believes that using a total propulsion package from one supplier will be beneficial for Fjord1. “The engines and the Azipulls in combination will reduce operating costs and give a much better emissions profile,” he said. “They will also allow the vessel to run efficiently at higher speed and with better manoeuvrability.” Mr Nogva also emphasised that the Bergen C series minimises methane slip, which has been a question mark over using LNG engines. “Methane is 21 to 25 times a more aggressive greenhouse
gas than CO2, so it’s important that an engine burns all the methane. We are doing that much better than any of our competitors.” The LNG supply infrastructure will also not be an issue for Boknafjord, as there is a LNG storage plant in Halhjem harbour. Environmental concerns were a high priority,
therefore Boknafjord meets DNV’s Clean notation. For instance, the Rolls-Royce engines already meet IMO Tier 3 emissions regulations, which are not due into force until 2016. There is also an Aco Marine sanitation system installed on board. “It’s an advanced new plant,” said Mr Oksnes. “The final waste product is cleaner than with previous installations and is delivered for shore disposal.
Nothing is emitted from the ship that would have a negative impact on the environment.” The machinery room configuration ensures that
there is redundancy and enabled the vessel to meet DNV’s RPS (redundant propulsion) class. “If you split the ship down the centre fore and aft then you would have the two forward engineroom compartments and one gas tank, mirrored in the aft section,” said Mr Oksnes. “There are also two electrical switchboards, one fore and one aft, so there is a complete split in the systems. If there is a breakage or accident in one half of the ship, the other half is still available.” This complies with IMO’s safe return to port rules. Cross connections between the fore and aft gas tanks and switchboards also ensure redundancy. “You can run the ship in a high number of variations,” commented Mr Oksnes. The main engine control room is situated just
below the wheelhouse, and there is a second control room on deck 1. Fjord1 superintendent and captain of Boknafjord, Frode Bekkenes, said, “You have the same options for controlling the machinery from both locations.” Mr Oksnes explained the rationale for having these two rooms. “The intention is to have a high level of communication between the bridge crew and the technical crew. They are sitting
Each of the four Rolls-Royce C series engines is placed in a separate compartment
www.passengership.info Passenger Ship Technology I Spring 2012 I 21
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