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Wärtsilä Waterjets Jet Powered Efficiency and Reliability Marine Propulsion Wärtsilä Waterjets Jet powered efficiency and reliability Midsize and Modular Solutions Incat Australia 99 m high speed catamaran – HSC Francisco is owned by Argentine-Uruguayan ferry company Buquebus and is operating between Buenos Aires and Montevideo. The ship that accommodates 1,000 passengers and 150 cars is currently the fastest ship in the world (56 knots!) Image courtesy of Incat Australia 2 x LJX1720SR waterjets Wärtsilä Waterjets When deciding on the right waterjet solution there are Wärtsilä waterjets have been developed many variables to consider – from size, weight and power in line with the latest operating demands for Fast ferries, Littoral combat ships, Fast to efficiency, reliability, support and ease of integration. All patrol boats, Rescue vessels, Fast yachts, of this can make it a complicate process, but it doesn’t Fast supply vessels, workboats and Landing have to be. At Wärtsilä we have been delivering waterjet crafts. The aim, as with all Wärtsilä products solutions that meet customer needs and all these variables and solutions, is to ensure optimal efficiency, for over 40 years. At the heart of this is our Smart Marine excellent hydrodynamic performance, and Vision, where collaboration and the most advanced digital less maintenance. With two alternative options, and ranging from 500 to 30,000 kW, technology come together to deliver solutions with greater Wärtsilä waterjets enable vessels to meet and efficiency, safety, security and reduced environmental impact exceed the performance levels required for throughout the life of the asset. today’s competitive operating environment. Image courtesy of OCEA Image courtesy of Austal USA OCEA France 35 m Multipurpose Fast Patrol boat – P314 Austal USA 127 m LCS – The Independence class is a class of littoral Kuwait Coast Guard combat ships built for the United States Navy. 2 x LJ65E waterjets 2 x WLD1720 waterjets 2 x WLD1500 waterjets 2 Waterjets are typically suitable for: z High-speed vessels. Waterjets have better propulsion efficiency at ship speeds above 25-30 knots. z Shallow draft vessels. With no underwater appendages and small radial dimensions of the impeller, axial waterjets are well suited for rescue vessels, inshore passenger ferries, landing crafts and special workboats. z High power density. Because of the pressure build up in the waterjet inlet, the physical dimensions are minimised. z High level of manoeuvrability. Waterjets have integrated steering and reversing capabilities with fast response Integrated waterjet solutions Wärtsilä Data Collection Unit Cloud based services and remotemonitoring Wärtsilä Fuel GasSupply Systems LNG / LPG /Synthetic & Biomethane /Ammonia /Methanol Wärtsilä ProTouch Propulsion control system Wärtsilä 31 The most efficient 4-stroke engine Wärtsilä 14 Wärtsilä Modular Waterjet Wärtsilä Dynamic Positioning Compact high speed Enabling SmartDock and SmartTransit Wärtsilä HY Hybrid and battery systems Wärtsilä Lifecycle Solutions Reducing costs and increasing vessel availability Wärtsilä Midsize Waterjet Midsize and Modular Waterjets For the large waterjets, the design of systems you are also gaining the Wärtsilä offers two main waterjet the inlet duct is optimised to fit the experience and capabilities from executions: a pre assembled specific vessel requirements. Because across our portfolio of solutions. This (midsize) range, and a modular jet of its size, the waterjet inlet is part integration allows all of the elements range. The pre-assembled midsize of the ship construction. Our design to work together seamlessly, from gas waterjets consist of a skid, with an capability for these larger waterjets systems, engines and waterjets to integrated inlet duct, that allows for includes units of up to 50 MW. data analytics, control systems and installation directly onto the ship’s Seamless integration smart docking. This integration will hull. All auxiliary systems, such as Wärtsilä waterjet solutions are flexible offer added operational efficiency and the hydraulics and coolers, are and capable of being integrated with savings with the ability to optimise pre-mounted on the assembly and the systems you select. However, operations to increase vessel utilisation, the piping connections are installed. when integrated with other Wärtsilä reduce costs and support your crew. These units are available in five sizes up to approx. 4500 kW. 3 We have Wärtsilä waterjets on several of our fast ferries, ”so we are familiar with the quality and performance they deliver. We are also familiar with the Wärtsilä 31 engine, which is really in a class of its own in regards to efficiency, Flemming Kristensen, Technical Director, Molslinjen. Integrated Wärtsilä 31 engines, WXJ1500SRI waterjets, and Image courtesy of Austal Ships Pty Ltd ProTouch powering the Express 5 Molslinjen high-speed ferry delivering optimised lifecycle reliability. Length 115 m. Technological Leading hydrodynamic footprint. With more than 25 years leadership expertise experience in advanced numerical Wärtsilä Marine Solutions has flow (CFD) simulations, we can Wärtsilä strives to continuously the latest and most modern determine the performance of the improve its products by significantly hydrodynamic tools, as well as vessel’s propulsion in full scale and at investing in research and extensive in-house experience and an early phase. development. For our waterjets know-how. This has enabled us The waterjets are equipped with portfolio, the extensive research to design and optimise propulsion high performance pump impellers, programme focuses on fine-tuning systems that meet the most stringent designed for high power density and our pump technology. This has requirements of modern shipping. good cavitation performance. For resulted in greater efficiency, less By analysing the vessel’s sailing each vessel, a dedicated inlet duct cavitation (minimising noise and pattern and incorporating the results design is determined. This allows vibration), a reduced environmental into the propulsion unit design, the vessel’s operational profile to be impact, lowest size to weight ratio Wärtsilä enables owners to maximize aligned with the optimum waterjet in the market and an optimised their vessels efficiency, while at the working point. With an optimised inlet maintenance requirement. same time minimizing both fuel design the cavitation, and therefore consumption and the environmental the vibration levels, are minimised. 4 Integrated Wärtsilä 31 engines, gears, shaft and WXJ1500SRI waterjets Reduced transom flange diameter Axial waterjet Mixed flow waterjet Axial jet technology with mixed architects, the axial jet technology installation significantly. These weight flow properties creates the possibility to apply a optimisations and savings can be as Wärtsilä axial waterjets are single larger power density onto narrower high as 20% compared to non-axial stage, compact, high performance hulls in order to achieve top vessel jet designs. systems that combine mixed flow performance. Improved operating flexibility properties with an axial construction. Average 25% reduced transom and manoeuvring. Thanks to the This results in much less space being occupancy. Unlike a non-axial increased pump cavitation margin of needed on the vessel’s transom, and design, the Wärtsilä axial design 35% and the lower impeller tip speed, greatly increased waterjet cavitation waterjet does not expand in a radial more power can be introduced to margins for optimum vessel direction downstream. As the water the pump during manoeuvring. This operational flexibility. flow is directed through the pump results in a 15% higher manoeuvring The reduced transom space along the most efficient path, it is thrust and faster response to requirement is achieved without easier to fit the jet to the available acceleration. The operating flexibility is reducing the inlet duct diameter transom space. improved because of the combination or the size of the waterjet pump in On average 15% less weight. of the reduced number of shaft lines order to maintain maximum efficiency The reduced transom size also and the higher loads of the remaining for the lowest fuel burn. For naval decreases the weight of the engines. 5 Large-size quality in a pre-assembled plug-and-play package. The midsize waterjet is the most complete waterjet package available in the market. Midsize waterjet For engine powers of up to 4500 kW, Wärtsilä has developed a compact, lightweight and easy to install waterjet package. To reduce shipyard installation work and costs, the waterjet is pre-assembled on a skid for direct ‘weld-in’ or ‘bolt-in’ connection to the hull. The driveline of the jet is aligned and all auxiliary systems are mounted on the skid, complete with all piping connections. z A compactly designed axial pump with excellent efficiency, cavitation, Image courtesy of Millenium Superyachts and noise characteristics. z The waterjet unit is completely The fastest yacht in the world. z pre-assembled, thereby reducing Inboard mounted thrust bearing 70 knots top speed powered installation and commisioning time. block, for increased life and easy by Wärtsilä waterjets. Length 42 m. z High performance components in maintenance. 2 x LJ77E 2x LJ84E stainless steel to prevent wear and z Inboard hydraulics provide an corrosion. environmental friendly solution, z The water lubricated bearing increased life, and cost saving in the stator bowl provides an easy maintenance. environmentally friendly solution. z Machinery controls integrated
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