The Damen Shipyards Group has delivered five of its 2306 E3 electric ferries to Arriva Denmark in Copenhagen where the company is operating the vessels on behalf of Danish public transportation agency Movia. The vessels are based on what Damen calls its ‘E3 philosophy’ – environmentally friendly, efficient in operation and economically viable.
Damen said that improving the efficiency and reducing the environmental impact of the vessels began at the earliest concept stages. For example, computational fluid dynamics (CFD) were applied to the hull design, minimizing resistance in the water, while extensive simulation was employed to optimize energy transfer between the batteries and motors.
The Solar Eclipse Aquanima 40 yacht, constructed by Azura Marine, has undergone a successful four-hour sea trial off the coast of Bali, Indonesia.
The boat’s builders stated that it achieved a maximum speed in excess of 8.5kts, but more importantly, was able to cruise at a steady 4.5kts, while consuming less power than was captured by its solar panel array. At this speed, it used 2kWh while the panels produced 8kWh. As a result, the vessel returned to its mooring with a fully charged battery. The company noted that throughout the sailing, navigation systems and domestic appliances were also consuming energy.
According to researchers at the University of Saskatchewan, the use of affordable materials in battery cathodes for large scale applications, including marine use, could soon become a reality.
“Cathodes represent 40% of the cost of the batteries that we are using in our phones right now. They are absolutely crucial to improve battery performance and reduce dependency on cobalt,” said Majid Rasool, lead author on a paper (PEDOT Encapsulated and Mechanochemically Engineered Silicate Nanocrystals for High Energy Density Cathodes) that investigates the use of iron and silicon for cathodes.
Both iron and silicon are abundant materials, hence why Rasool’s research team wanted to further investigate their potential in battery applications.
Marine energy storage supplier Sterling PBES has announced the completion of its most intense fire and safety testing to date.
The recent tests, the company said, validate the integrated liquid cooling, fire stop, and ventilation systems that come installed in its battery systems.
For the tests, a ferrous metal spike was driven through all plies of a cell in the battery, simulating catastrophic mechanical damage. Known as the most invasive and difficult test for a lithium battery, the nail penetration test simulates damage that may occur as a result of mishandling or impact from external forces.
A new generation of boutique cruise ships is set to emerge, with the luxury of a superyacht, the construction techniques and passenger experience of a cruise ship, and a close focus on the environment. So says hybrid and electric marine specialist Wärtsilä, which has signed a partnership agreement with architect and yacht designer Stefano Pastrovich for the design of innovative sustainable superyachts for the boutique cruise sector.
Precise details are still sparse, but Wärtsilä said the design will feature a fully integrated combination of hybrid propulsion and solar panels. The powertrain will be installed in a 60m-long catamaran with accommodation for up to 36 passengers.
Electric rim thrusters can offer a number of benefits over more traditional propulsion systems, such as low emissions and reduced noise, said German firm Schottel, which has released a high power density, 500kW version of its SRT thruster, the SRT-R.
The firm noted that through extensive use of CFD (computational fluid dynamics) the hydrodynamic design of the blades has been optimized to minimize cavitation. The thruster can be orientated 360°, yet when retracted, does not add to the drag of a vessel’s hull. The SRT-RT version can also be used as a transverse thruster when retracted, which is useful in shallow water operation.
A Belfast Maritime Consortium led by Artemis Technologies has won a £33m (US$40m) UK government innovation grant to develop zero-emissions ferries in the city, which it says will revolutionize the future of maritime transportation.
With further investment from consortium partners, Artemis said the total project investment will reach close to £60m (US$74m) over the next four years, creating an initial 125 research and development jobs, and leading to more than 1,000 in the region over the next 10 years.
A spin-off from the America’s Cup sailing team, Artemis Racing, Artemis Technologies is led by double Olympic gold medalist Iain Percy OBE.
German company Volabo hopes its 48V drive motor technology will change the tendency for 48V motor systems to be found in mild-hybrid automotive applications.
Initially developed with passenger car applications in mind, the company has decided to launch the first production version of its ISCAD (Intelligent Stator Cage Drive) V50 – which combines low-voltage operation without the downsides of very high-current draw at high power outputs usually associated with such motors – into the marine market.
Volabo’s motor concept centers around a completely new approach to the construction of the stator for an induction motor. Where in a conventional motor, the stator consists of multiple copper windings arranged in the slot gaps of the stator, this motor doesn’t.