The Wärtsilä 46DF is a four-stroke dual-fuel engine that can be run on natural gas, heavy fuel oil (HFO) or marine diesel oil (MDO).
The engine can smoothly switch from gas fuel to HFO/MDO operation and vice versa without loss of power or speed. The Wärtsilä 46DF design is based on the well proven and reliable Wärtsilä 46F and Wärtsilä 50DF engine families, which have operated successfully on the market since the early 2000s. Both engines have an outstanding track record, with more than 800 engines in operation and over 11 million running hours experience using Wärtsilä’s leading DF technology.
The Wärtsilä 46DF has extended Wärtsilä’s dual-fuel engine family by covering the power range from 6.2 MW to 18.3 MW at 600 rpm.
Wärtsilä’s proven dual-fuel technology enables owners and operators to choose both gas and liquid fuel, and switch between the two according to cost, availability, and local environmental regulations.
The switch between fuel types is made without loss of power or speed. The engine automation adapts automatically to the relevant fuel selection, both in normal and emergency modes.
In gas mode, the natural gas is fed to the engine at low pressure. This facilitates a simpler and space-saving engine room configuration while providing easier and faster maintenance activities.
The engine’s gas piping is double-walled as standard, and the advanced integrated automation system enables enhanced safety and local monitoring. This leads to safer and more reliable operations, under all conditions. The complete built-in automation minimizes the need for external controls, thus saving engine control room space.
The Wärtsilä 46DF is designed for a broad range of marine applications. Thanks to its fuel flexibility and modular, compact design, the engine can be optimized for constant-speed diesel-electric operation. It also meets the need for direct drive main engine propulsion, operating at either constant speed or along a combinator curve. The multi-fuel operation capability offers new machinery opportunities for various vessel applications.
The technology group Wärtsilä will supply main and auxiliary engines, fuel storage tanks, gas handling equipment and electrical systems for a new RoRo being built for Australian operator SeaRoad Shipping. The orders with Wärtsilä were placed in Q1 2022.
The 210 metre-long vessel is under construction at the Flensburger Schiffbau-Gesellschaft (FSG) shipyard in Germany. The vessel will operate primarily on LNG fuel. Wärtsilä’s depth of experience and in-house know-how on LNG systems was a major consideration in the award of the contract.
The vessel will be powered by two Wärtsilä 46DF dual-fuel main engines and three Wärtsilä 20DF dual-fuel auxiliary engines. The Fuel Gas Handling System and LNG tanks are designed with the Gas Valve Units (GVUs) integrated into the tank connection space. This solution is unique to Wärtsilä and reduces the amount of piping needed, facilitating easier installation.
Wärtsilä will deliver almost every electrical system on board. This includes bridge consoles with integrated navigation, redundant dual-gyro compass systems, nautical sensors, external communication systems, power take-in and take-out (PTI/PTO) shaft alternators with multi-drive technology, monitoring and control systems, switchboards, internal communication, and safety systems as well as lighting.
Wärtsilä will design and integrate the entire electrical package, as well as delivering the cable network. The integration project continues a successful partnership between FSG and Wärtsilä in this area lasting more than 25 years.
“We recognise Wärtsilä’s strong capabilities in LNG-related technologies, as well as their capabilities in electrical systems, and these solutions are an excellent fit for this vessel,” says Philip Maracke, CEO, FSG. “We thank Wärtsilä for its excellent support and cooperation during the various phases of this project.”
Matthias Becker, General Manager Sales, Wärtsilä Marine Power, says, “We have enjoyed a very positive relationship with both the yard and the owners throughout this project. SeaRoad is committed to sustainable practices, and this very much aligns with our own commitment to the decarbonisation of shipping operations. The solutions selected for this vessel promote these ambitions.”
Electrical installation will commence in this year, whilst the bulk of Wärtsilä equipment is scheduled for delivery to the yard during the first half of 2023; the ship is expected to be completed by the end of 2023. The vessel will have 3,987 lane metres for various freight units and will sail on Bass Strait, between Melbourne, Victoria and Devonport on the Australian island state of Tasmania.
Media contact for more information on this release:
Communications Manager, Positioning
Wärtsilä Marine Power
Tel: +44 788 473 7177
Image caption: Wärtsilä will deliver LNG fuel equipment and electrical systems for a new RoRo being built for Australian operator SeaRoad Shipping © Flensburger Schiffbau-Gesellschaft
|Wärtsilä Marine Power in brief
Wärtsilä Marine Power leads the industry in its journey towards a decarbonised and sustainable future. Our broad portfolio of engines, propulsion systems, hybrid technology, and integrated powertrain systems delivers the efficiency, reliability, safety, and environmental performance needed to support our customers. Our offering includes performance-based agreements, lifecycle solutions, and an unrivalled global network of maritime expertise.
Wärtsilä in brief: