Rolls-Royce has unveiled a ground-breaking luxury yacht concept designed to showcase the advantages of advanced ship intelligence solutions and hybrid propulsion based on Liquefied Natural Gas (LNG) fuel and battery power in the marine leisure market. Power is derived from twin LNG-fuelled 16V4000 MTU M65-N generator sets.
Introduced during the Global Superyacht Forum (GSF) in Amsterdam, the Crystal Blueyacht and its attendant support vessel Blue Shadow have been developed to enable new thinking in yacht design and propulsion by optimising the yacht’s super structure for greater guest use and comfort, without impacting the environment.
One of the many novel features of the luxury yacht is the use of an intelligent dynamic positioning system which automatically controls twin azimuthing thrusters and a TT1100 bow thruster – technology that is usually found on offshore support vessels that must maintain their positions next to oil rigs to within a couple of metres.
During his keynote speech at the GSF event, Oskar Levander, Rolls-Royce SVP Concepts and Innovation explained the apparent absence of a bridge on the vessel: “Our ship intelligence and remote-control concepts have allowed us to design a yacht for the future that has the bridge located below the bow, inside the vessel. The crew is able to monitor and control the vessel using sophisticated sensors, cameras, display screens and situational awareness technologies; but an internal bridge frees up the traditional area of the bridge in the forward part of the superstructure to let owners and guests enjoy a panoramic vista that is traditionally only enjoyed by the crew.”
The bridge console is based on the Unified Bridge design that Rolls-Royce has already delivered to a number of ship types, including large superyachts. It also features technology Rolls-Royce and Svitzer demonstrated in the first remote controlled commercial tug earlier this year.
Rolls-Royce LNG-based Power
The machinery on the luxury yacht consists of twin LNG-fuelled 16V4000 MTU M65-N generator sets working in parallel with a battery bank to provide 1MWh of genset-free power during port stays. Two low-weight carbon Azipull thrusters provide propulsive power to achieve maximum service speeds of 20 knots.
Designed for 12+ passengers and 12 crew, the 62 metre Crystal Blue is based on a composite or aluminium hull operating a power plant based on the Rolls-Royce hybrid LNG/Battery SAVe-CUBE system configuration.
Although LNG fuel is increasingly specified for commercial vessels, particularly coastal ferries, the size of the fuel tanks and a lack of LNG bunkering infrastructure has been a major barrier to the yacht sector embracing the cleaner, odourless fuel.
“This is where Blue Shadow comes in,” explained Henrik Alpo Sjöblom, Project Manager in the Rolls-Royce Blue Ocean team.
Operating in convoy, Blue Shadow is a smaller 42 metre, remotely-controlled, steel-hulled support vessel used for transporting and launching the mother ship’s tender, helicopter and any other ‘toys’ that the yacht owner may have. It also allows designers to make better use of the aft area of Crystal Blue for guests, such as by including an infinity pool, or a beach area. The shadow boat also doubles up as the owner’s personal LNG bunkering barge.
“Burning LNG has clear advantages over Marine Diesel Oil for the yacht sector,” said Sjöblom. “There is no smoke, it doesn’t emit any unpleasant odours or fumes and it meets stringent emissions regulations, allowing yachts to enter otherwise prohibited ecologically sensitive waters.
“We have dimensioned Crystal Blue fuel tanks for a range of 3000 nautical miles without refuelling but with the Shadow’s additional fuel capacity, the range increases to 4400 nautical miles, meaning that most of the typical yachting areas are accessible.”
Explaining the reason behind the development, Levander added: “With Crystal Blue and Blue Shadow we can more effectively showcase how new digital-based ship intelligence solutions can offer unique possibilities, greater capability and added value to the luxury yacht market, both for new and existing vessels. The systems and technologies Rolls-Royce has available can bring ‘green’ values and previously unheard of levels of comfort to the yacht owner.”
“We have a huge offering within Rolls-Royce and our portfolio is highly compatible with the marine leisure market. With Crystal Blue we can show what can be achieved and how the yacht of the future might look. We can give complete freedom to yacht designers and, in so doing, better fulfil the yacht owners’ dreams.”