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Thursday, April 4, 2019 

An extension to the original planned routes by about 50% demanded by Danish public transport agency Movia has led to operator Arriva Danmark increasing its order with Damen Shipyards Group.

Arriva originally contracted for five fully-electric Damen Ferry 2306 E3 vessels to cover passenger routes in the central metropolitan area of Copenhagen, with the purpose of upgrading the current ferry service in the city of Copenhagen to a more environmentally-friendly solution. To provide a fully-integrated system, Damen analysed the conditions in which the ferries would operate, and the demands placed on them in their operation. The vessels needed to fit in with the existing service currently in place, without requiring adaptation on the side of the service operator. The solution, decided after extensive studies, centred around Damen's E-Cross electrically powered ferry range, designed to be environmentally friendly, efficient in operation and economically viable. The E-Cross ferries are zero-emissions vessels boasting excellent manoeuvrability, low maintenance and modular deck arrangements.

The route extension incorporates an additional four stops to make a total of thirteen stops, including a terminal in Copenhagen’s port area. This significantly impacts the scope of the project, as new power requirements must be considered in the integrated solution.

Martin Verstraaten, Damen Sales Manager, oversaw the process. He said: “The team investigated ten possible scenarios to determine how multiple variables would affect the performance of the ferries on the longer route. We also needed to determine how power demands would influence the cost impact in order to find the best way of incorporating the additional requirements.”

New studies of the enhanced operation indicated that two additional vessels, plus increased battery capacity and additional charging facilities would meet the revised needs. “The larger scope required new battery packs to be installed on some vessels,” said Verstraaten, “and a new charging system with increased charging capacity to be constructed at the port area terminal.”

Dynamic water conditions in the port area added a layer of complexity to the charging process, as Bastiaan Vink, Design and Proposal Engineer at Damen, explained. “According to the motion report we produced, the ferries must be secured to the jetty in order to access the fully integrated battery charging system.”

Damen’s solution was to develop an auto-mooring system for the vessels, which increases safety around the integral system while simultaneously saving more than 10% of a vessel’s energy usage per day. The extended route length also affected the on-shore charging facilities. According to Vink, “We needed to increase the battery charging capacity from 450kW to 600kW per charger, to supply each vessel with the power it needs to complete the longer route.”

The first five vessels in this project will be delivered according to the original contract, with the two additional ferries following in May 2020.

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