With the Wärtsilä 20DF, Wärtsilä is extending the benefits of dual fuel (DF) technology to cover the entire power range. The engine offers ship owners and operators a compact unit that brings all the advantages of fuel flexibility to auxiliary applications, such as generating sets or as the prime mover in smaller vessels.
Based on the well proven and reliable Wärtsilä 20 diesel engine introduced in the early 1990s, fuel flexibility means the engine can be optimized for constant speed generating sets, as well as variable speed mechanical drives, for main engine applications.
The Wärtsilä dual fuel engine capability enables ships to be operated on either conventional liquid marine fuels (LFO, HFO or liquid bio fuel) or LNG. The switch between fuels can be made seamlessly without loss of power or speed. Such fuel flexibility enables compliance with emission regulations in controlled areas, while giving operators the option of determining the fuel according to cost and availability.
When operating in gas mode, the Wärtsilä 20DF engine is already compliant with IMO Tier III regulations without any secondary exhaust gas purification systems. Also, when fuelled by gas, the SOx and CO2 emissions are notably reduced and smokeless operation is attained.
In liquid fuel oil mode, the Wärtsilä dual-fuel engines are fully compliant with the IMO Tier II exhaust emissions regulations set out in Annex VI of the MARPOL 73/78 convention. The engine is able to operate efficiently and economically on low sulphur fuels (<0.1% S), making it suitable for operation in emission-controlled areas.
Installed alongside Wärtsilä 34DF, 46DF or 50DF main propulsion machinery, a Wärtsilä 20DF generating set completes the multi-fuel engine room concept. Compact and light, the Wärtsilä 20DF is intended for use in those vessel types where the Wärtsilä 20 is currently installed.
As well as being an ideal mechanical-drive prime mover in smaller applications, such as small cargo vessels, ferries or tug boats, it is also an excellent choice for harbour generating set applications in a wide range of vessel types.
Get technical data and system proposals for designing W20DF marine engine installations.
The technology group Wärtsilä has signed an Optimised Maintenance Agreement with the Canadian ferry operator Societé des Traversiers du Quebec (STQ). The five year long-term agreement covers two vessels, the ‘Jos Deschenes II´ and the ‘Armand Imbeau II’, each of which operates with Wärtsilä 20DF dual-fuel engines. A similar agreement was signed earlier covering another STQ ferry, the ‘F.A. Gauthier’. The latest contract was signed in October 2021 and carries an option to extend the agreement for an additional five years
Wärtsilä’s ability to provide truly customised agreements that improve efficiency, reduce emissions, and ensure better availability for these vessels was cited as a prime consideration in the award of this contract. Included in the scope of services provided are Wärtsilä’s unique Expert Insight digital solution, and Data-Driven Dynamic Maintenance Planning. Expert Insight uses artificial intelligence (AI) and advanced diagnostics to achieve an unprecedented level of predictive maintenance that can reduce unplanned maintenance by up to 50 percent. Dynamic Maintenance Planning is enabled with data and advanced analytics and remote monitoring, thus providing accurate insight into the vessel’s performance.
“The Wärtsilä agreements deliver the operational certainty that is essential for ferry service providers. Equipment reliability is enhanced, maintenance is optimised, and efficient performance is assured, all of which enable cost savings over a long term,” says Luc Morneau, Director of Marine Operations at STQ.
“The agreements with STQ for these two vessels, together with the earlier one for the ‘F.A.Gauthier’, provide clear evidence of the value delivered through equipment data insights, real-time operational support, and data-driven dynamic maintenance planning based on actual need rather than an arbitrary number of operating hours. The benefits include significant cost savings and reduced fuel consumption, which in turn limits emissions for a minimised carbon footprint,” says Henrik Wilhelms, Director, Agreement Sales, Wärtsilä Marine Power.
The 92-metre-long passenger ferries are part of the Canadian Province of Quebec’s transportation system.
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Image caption: Two LNG-fuelled ferries operated by STQ will be covered by five-year Wärtsilä Optimised Maintenance Agreements.
© Societé des Traversiers du Quebec
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:
Wärtsilä is a global leader in innovative technologies and lifecycle solutions for the marine and energy markets. We emphasise innovation in sustainable technology and services to help our customers continuously improve their environmental and economic performance. Our dedicated and passionate team of 17,500 professionals in 200 locations in more than 70 countries shape the decarbonisation transformation of our industries across the globe. In 2020 Wärtsilä’s net sales totalled EUR 4.6 billion. Wärtsilä is listed on Nasdaq Helsinki.