The bulk carrier Misje Vita is the latest step on Misje Rederi’s journey to build one of the world’s cleanest and most sustainable fleets. Why did the company choose to go hybrid, and how much fuel might they save in the process?

The efficient heart of the Misje Vita is the Wärtsilä HY hybrid system, which combines engines and batteries and is designed to optimise the propulsion system’s response to changing conditions. This greatly enhances the vessel’s fuel efficiency and overall performance.

Because the Wärtsilä HY hybrid system has a high level of flexibility, it allows the engine to operate in the most efficient way possible, saving fuel and emissions. It also allows the Misje Vita to sail in and out of port and carry out cargo operations purely on battery power. This helps the vessel to comply with ever-stricter port emissions regulations. In addition, it means there is less need to use the auxiliary engines during operation, which has a direct impact on the vessel’s CII rating.

A complete hybrid system that makes the complex seem simple, The Misje Vita was designed by Wartsila Ship Design, and Wärtsilä supplied the complete hybrid system including:

• Wärtsilä 20 main engine
• Wärtsilä NOx Reducer
• Power transmission system and electrical and automation systems
• Controllable pitch propeller,
• Wärtsilä ProTouch bridge control system
• Hybrid battery solution and energy management system (EMS).

Wärtsilä also supplied the integrated automation system (IAS) as well as the navigation and communication systems.

The EMS is a very important component of the hybrid system. It maximises efficiency because it optimises the energy flows between the power sources, consumers, and storage in an intelligent way.

Although this was a highly complex system integration project, having a single supplier made it simpler for Misje Rederi. “Misje Rederi knew that the key to success was having a single partner that could supply and integrate a complete system. They also wanted to have experts close by to support them. Therefore, our local presence was a big plus for this project, and creates high expectations to our excellent service team” says Roy Helge Stavland, General Manager at Wärtsilä Norway.

Fuel savings of up to 40 percent

The 5000 dwt bulk carrier was built in Colombo, Sri Lanka with Wärtsilä and the shipyard cooperating closely throughout the construction process. Since it began operating in 2022, the Wärtsilä HY hybrid system has delivered fuel savings of as much as 40 percent compared to same size vessels in the fleet. Misje Rederi has ordered five more hybrid vessels. These new additions to the fleet will help the company to improve the environmental performance of its fleet and achieve its ambitious sustainability goals.

For more information visit www.wartsila.com