Pioneering sustainability: Sirius Rederi's visionary partnership with Kongsberg Maritime

Revolutionising propulsion: the hybrid system

In an interview, Mr Ekornesvåg discussed Kongsberg Maritime’s perspective on the growing demand for sustainable technologies in the shipping industry. He highlighted a substantial demand driven by the industry’s goal to be fossil-fuel-free, with a focus on developing, combining and implementing new fuels and technologies.

Mr Ekornesvåg delved into the capabilities of the hybrid propulsion system, a breakthrough technology that aligns with the industry’s push for cleaner alternatives.

The system uses a shaft generator as the primary power source, with an energy storage system (ESS) in peak shaving/load smoothing mode during normal service.

Notably, it is anticipated that no auxiliary engines will be required for harbour manoeuvres, as the shaft generator and ESS will provide ample power for entering and leaving harbours.

The ESS, boasting a 420-kWh battery solution, is designed for a power takeout of up to 1,200 kW. It plays a crucial role in operations including ballasting, cargo handling, blackout prevention, and "take me home" operations. In addition, it facilitates emergency rescue operations, even in blackout scenarios.

Continued evolution in tanker design

Addressing the evolution in tanker design, Mr Ekornesvåg outlined the journey that began several years ago. The focus was on finding optimal main parameters and hull form, utilising new technology to reduce energy consumption.

The evolution included introducing LNG, improving propulsion systems with the KM Promas system, integrating hybrid propulsion using shaft generators and batteries, introducing shore power, and advancing to methanol and wind-assisted propulsion with sails. 

The integration of digital systems on board further enhances emissions reductions. Kongsberg’s K-Chief and Vessel Insight solutions leverage voyage data, including wind and current predictions, to control the main engine and associated electrical control systems. K-Chief handles critical functions such as power management, auxiliary machinery control, cargo monitoring, and more.

The Vessel Insight vessel-to-cloud infrastructure provides real-time access to vessel-specific dashboards and fleet overview data analysis tools for both crew and onshore operational staff.

Future-proofing sustainability: Kongsberg Maritime’s vision

In response to how Kongsberg Maritime plans to stay ahead of upcoming emissions requirements and continue supporting environmentally friendly operations for Sirius Rederi, Kongsberg Maritime chief designer Mr Vedlog emphasised the commitment to developing new technology. The strategy involves combining proprietary innovations with products from other players in the marine business, ensuring a holistic approach to environmental responsibility.

The Sirius Rederi contract follows the earlier success with Tärntank, where Kongsberg Maritime provided design, engineering, and equipment for three methanol-ready, wind-assisted tankers.

The collaboration showcases Kongsberg Maritime’s position as a front-runner in designing low-emissions, sustainable solutions for the shipping industry.

Kongsberg Maritime has developed an ammonia fuel system, receiving approval in principle from classification societies DNV and Bureau Veritas.

The company is also actively examining hybrid propulsion systems utilising batteries for peak shaving, manoeuvring and emergency operations.

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