World’s first ferry powered by iC7-Marine: Aurora Botnia

Wednesday, April 3, 2024

FINLAND: The Aurora Botnia hybrid-electric ferry operated by Wasaline is the first vessel in the world to be equipped with high-power liquid-cooled iC7 drives from Danfoss. The RoPax ferry operates between Vaasa, Finland and Umeå, Sweden. It is equipped with a hybrid electric propulsion system onboard, implemented by WE Tech Solutions. This system combines the engines with 2.2 MWh batteries. It uses low-emission hybrid technology, together with four large lithium-ion battery energy-storage systems supporting power generation. This system has already reduced CO2 emission on the ferry route and the use of biogas will reduce emissions even further.

The electric motors, the propulsion system, and the grid-related functionality are controlled by iC7-Marine drives and power converters, providing the best energy efficiency and lowest emissions possible.

Wasaline ferry
Wasaline ferry on open water
Wasaline ferry from the side
Play the video to see Aurora Botnia in operation on the route between Vaasa, Finland and Umeå, Sweden.

The Challenge: Hybrid-electric RoPax ferry

This Wasaline ferry was chosen as a pilot case for Danfoss Drives iC7 series, with the aim of constructing a highly eco-friendly ship. The new vessel was designed to run on a combination of battery power, liquefied natural gas (LNG), and even biogas. The Aurora Botnia is built to be fully compliant with the International Maritime Organization’s 2030 greenhouse gas reduction target, as well as the European Union’s upcoming Fit for 55 package, making it a true team player in sustainable transportation.

To ensure the highest levels of energy efficiency, a unique Finnish marine industry cooperation was established between WE Tech Solutions, VEO, and Danfoss Drives.

The ferry itself is built using cutting-edge LNG (liquefied natural gas) / battery-electric hybrid technology utilizing iC7-Marine and iC7-Hybrid liquid-cooled modules. This environmentally friendly approach is further enhanced by the advanced propulsion control systems, as well as the air-conditioning, cooling, and pumping systems that utilize VACON® 100 drives, also from Danfoss.

Danfoss worker in the engine room

The Solution: A seamless fit

Danfoss Drives is one of multiple companies who worked towards securing and enabling cutting-edge technology onboard the ferry. Working closely with system integrator WE Tech, Danfoss provided AC drives and power converters to complete the hybrid propulsion system. With Danfoss Drives’ approach of universal component compatibility, the iC7-Marine and iC7-Hybrid modules fit seamlessly into any operation system from other providers, ensuring smooth integration and installation.

Wasaline from the front

The Outcome: Less noise, fewer emissions

When approaching the harbor area, the Aurora Botnia switches to battery power. This ensures that the vessel is running on zero emissions in port. When berthed, the ferry connects to the onshore electric power grid via a shore supply system, allowing the batteries to recharge. Danfoss power converters ensure seamless matching of the ferry power grid to the harbor shore supply in terms of voltage and frequency. This eliminates the need for the ferry generators to generate electricity and ensures a more environmentally friendly operation.

Wasaline from the back

Predictive maintenance for top performance

Using a combination of iC7 series and VACON® 100 drives, Danfoss has developed a system that enables predictive maintenance, for increased operational reliability. The comprehensive remote monitoring system connects the Danfoss AC drives, providing increased operational reliability by anticipating maintenance needs in advance. The system also allows for upgrades and sustainable improvements, further enhancing performance of the equipment.

iC7-Marine drive

iC7-Marine drives

iC7-Marine drives regulate the two 6 MW propulsion engines and two 1.5 MW bow thrusters. 

iC7-Automation drive

iC7-Hybrid power converters

iC7-Hybrid power converters support the four 1.5 MW battery energy storage interfaces.

Related case stories

  • if (isSmallPicture) { Aurora Botnia cargo and passenger ferry; } else if (isBigColumns) { Aurora Botnia cargo and passenger ferry } else { Aurora Botnia cargo and passenger ferry }
    World’s first ferry powered by iC7-Marine: Aurora Botnia

    FINLAND: The Aurora Botnia cargo and passenger ferry is equipped with a hybrid-electric propulsion system, powered by liquid-cooled iC7 drives from Danfoss.

  • if (isSmallPicture) { One of the Nesodd ferries from behind; } else if (isBigColumns) { One of the Nesodd ferries from behind } else { One of the Nesodd ferries from behind }
    VACON® drives electrify passenger ferries in Oslo Fjord

    NORWAY: Electrification of the Nesodden ferries has reduced CO2 emission in the port of Oslo. VACON® drives and power converters play a key role onboard.

  • if (isSmallPicture) { Skulebas ship on open water; } else if (isBigColumns) { Skulebas ship on open water } else { Skulebas ship on open water }
    Decarbonizing the next-generation training ship, Skulebas

    NORWAY: The new training vessel at Maløy Fishing School uses less diesel and emits less CO2, while also meeting the rigorous demands of the fishing industry.

  • if (isSmallPicture) { ; } else if (isBigColumns) { } else { }
    Where smart ferry charging begins with a smart grid

    NORWAY: The Hareid-Sulesund ferry operations have reduced CO2 emissions by 7000 tonnes annually with the introduction of electric vessels. In transitioning ferries from diesel to pure electric power, powerful onshore support is essential, in the form of reliable infrastructure for rapid charging capacity and stable grid supply. The systems on board and on shore act as a single system – a sophisticated and competitive system developed by Norwegian Electric Systems (NES) using Danfoss technology.

  • if (isSmallPicture) { ; } else if (isBigColumns) { } else { }
    MAGDALEN replenishes U.S. beaches with the power of VACON® 3000 medium-voltage drives

    UNITED STATES: Somewhere off the coast of New Jersey, the Weeks Marine dredge Magdalen removes thousands of tons of sand off the seafloor and loads it into her hopper. The vessel then navigates to a spot where the shoreline was eroded and discharges the sand there, using slurry pumps powered by medium-voltage drives to reclaim a beach that storms had washed away.

  • if (isSmallPicture) { Research Vessel with reduced need for fuel and reduced emissions complying the IMO environmental regulations; } else if (isBigColumns) { Research Vessel with reduced need for fuel and reduced emissions complying the IMO environmental regulations } else { Research Vessel with reduced need for fuel and reduced emissions complying the IMO environmental regulations }
    Danfoss shaft generators drive down emissions on board

    SOUTH KOREA: The South Korean National Institute of Fishery Science is enjoying great fuel savings and 20-30% less emissions from its newest research vessel. A special shaft generator solution enabled the vessel to comply with the IMO environmental regulations effective in 2020.