The Motorship September 2020

Page 38



Credit Stena Line

While the use of batteries aboard vessels is not a recent innovation, regulatory pressures and technological developments are driving interest in battery solutions

Regional regulatory developments have driven interest in reducing emissions, with particular interest in reducing or eliminating the use of auxiliary engines while manoeuvring near ports or loading or discharging cargoes, for instance. Japan-based Yaskawa (formerly The Switch) are also seeing trends towards hybrid systems being adopted by the market. “IMO has set very strict rules to reduce emissions in the marine industry. With our hybrid solution, you can reduce emissions by adding a battery to even an existing system to replace the genset”, comments Teemu Heikkilä, Head of Product Line, High-Power Converters, Yaskawa. The market for battery technology is growing strongly in the short-sea and domestic vessel market, Heikkilä said. He added that: “Fully electrical vessels are gaining popularity, especially when it comes to short-distance vessels.” Heikkilä expects demand for full-electric vessels to expand from their current low base. However, as demand for battery solutions has expanded, greater attention is being paid to the challenges around battery power and energy density among current battery solutions on the market. “It is very interesting to see the huge development in energy density in batteries for marine applications over the last few years - with specialised battery types depending on

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8 Stena Line installed a containerised 1MWh containerized battery ESS aboard Stena Jutlandica in 2019

vessel type and load profiles of the batteries better supporting the needs for different operations”, comments Asbjørn Halsebakke, Director, Technical Solutions, Marine Business, Yaskawa. “We are very proud that we can exploit this development with our DC-Hubs and make sure that the vessels are operated safely and with high efficiency, to make the ESS last longer”, he adds. Kongsberg has been focusing its developments on making their technology safer with the second generation of the SAve Energy Battery system due to be completed this year; which will see enhanced lifetime performance of up to 20 years compared to existing technology, the company claims. Jens Hjorteset, Manager - Energy Solutions, Kongsberg Maritime AS also adds about the developments that Kongsberg has been working on with its battery safety: “We have also continued to develop our safety design for battery systems for the maritime market. We have looked at industry incidents, analysed their root causes and reviewed potential challenges. Based on our findings and crew experiences, we have designed protective mechanisms, and we are also working on getting these safety measures enforced as industry standards.” Currently, Kongsberg has delivered systems in a total of 100MWh. It seems that this trend will steadily grow as a

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