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technological pioneer in growth niches that are of decisive importance for us, for example in the integration of battery storage technology for hybrid drive systems for the maritime sector,” said Dr Lauber. “Hybrid drives are becoming ever more important as they help to improve the efficiency of the drive systems and at the same time reduce emissions,” he added. AKA's achievements include the world’s first hybrid-powered harbour-assist tug boat, and the world’s first hybrid offshore drillfloor system. The company is a pioneer and world leader in highly reliable and efficient closed-bus solutions for vessels utilising dynamic positioning systems. The company’s chief executive and co-founder Jason Aspin expressed his excitement about the possibilities offered by this collaboration: “We are in a time where the proper application of technology and innovation is going to result in radical changes to how society works with respect to transportation and power generation. Massive changes are required to meet the environmental challenges ahead of us, and together with MAN we can be leaders in that change.” Not to be outdone, Wärtsilä chose the Nor-Shipping 2017 exhibition to launch a fully integrated hybrid power module combining engines, an energy storage system, and power electronics optimised to work together through a newly developed EMS. The Wärtsilä HY is the marine sector’s first hybrid power module of this type, and is available in three configurations: diesel-electric, diesel-mechanical with power take-out/power take-in, and dieselmechanical with shaft generator/motor. Initially available only for diesel engines, the company plans to include dual-fuel engines at a later stage. Gas-burning engines in particular will benefit from battery use to keep the load within a range safe from knocking. Speaking to Marine Propulsion, Tony Chronnell, Wärtsilä’s sales manager for power propulsion, said: “Hybrid systems will undoubtedly be a significant part of the propulsion landscape in the future. We anticipate that they will provide a significant percentage of all contracted vessels.” The development of HY began in 2015, with its first testing taking place in combination with the Wärtsilä 26 engine on tug and ferry applications. At its heart, is the product’s energy management system. “The EMS enables

highly sophisticated operations to ensure that every possible bit of performance is squeezed from the system at the lowest possible energy cost,” said Mr Chronnell. The Wärtsilä HY will provide a wide range of benefits through increased operational efficiency and flexibility, resulting in lower fuel consumption, reduced emissions, and improved vessel performance. When operating in ‘Green Mode,’ zero emissions can be achieved. Smokeless operation is also achievable at all load points and in all operating modes, due to a new patent-pending automation procedure. Furthermore, the reduction in engine operating hours lowers maintenance requirements and extends the intervals between overhauls. In addition, propellers can be started by the energy storage system and operated at low rpm. Manoeuvring capabilities are enhanced and engine low-load running is avoided. The Wärtsilä HY will have dedicated versions for each category of vessel. The first versions being made available will be designed for tugs and medium-sized ferries, though Wärtsilä sees big potential

in other types of vessel as well. In fact, in the process of launching the new product, Wärtsilä announced the first order for the HY, a new 80-tonne bollard-pull harbour tug for Italian owner Rimorchiatori Riuniti, the biggest operator of tug vessels in the Mediterranean. The equipment will be delivered during the second half of 2018, and the new tug is expected to be in service by the beginning of 2019. The HY system will allow the tug to move within the waters of the port of Genoa by exploiting the battery powered propulsion and only using diesel propulsion in order to obtain the maximum power needed. Rimorchiatori Riuniti group technical director Raffaello Corradi said “We are proud to be the first in the industry to embrace this exciting and innovative hybrid technology. Wärtsilä is a company we know well, and we are not really surprised that it was the first to introduce this level of innovation. For us, Wärtsilä HY will provide operational flexibility, added security, and, above all, environmental sustainability.” MP

Aspin Kemp designed the XeroPoint hybrid propulsion system that featured on the world’s first true hybrid tug

Marine Propulsion & Auxiliary Machinery | August/September 2017

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Marine Propulsion & Auxiliary Machinery August/September 2017  

Marine Propulsion & Auxiliary Machinery provides the technical, operational and project teams that work for the ship owner/operator/manager...

Marine Propulsion & Auxiliary Machinery August/September 2017  

Marine Propulsion & Auxiliary Machinery provides the technical, operational and project teams that work for the ship owner/operator/manager...