Kongsberg Maritime has achieved a significant milestone in underwater noise reduction with its rim-drive azimuth thruster, which recently received the prestigious Silent-E notation from DNV. This marks the first time this certification has been awarded to such a system, underscoring its superior acoustic performance. Installed on the Commissioning Service Operation Vessel (CSOV) Norwind Hurricane and its sister vessels, the rim-drive thruster has set a new industry benchmark in minimizing underwater noise pollution, as demonstrated in a recent trial.
Addressing the Environmental Challenge
The growing concern over underwater noise and its impact on marine life has spurred innovation in the maritime industry. Kongsberg Maritime has been at the forefront of developing solutions that address this challenge. The rim-drive thruster, already recognized for its energy efficiency, now proves its effectiveness in protecting delicate underwater ecosystems by significantly reducing noise levels.
Enhancing Onboard Comfort and Energy Efficiency
The rim-drive propulsion system not only contributes to a quieter marine environment but also enhances onboard comfort and energy efficiency. Roy Ove Standal, Chief Operating Officer at Norwind Offshore, highlighted the system’s ability to reduce the need for additional support systems, leading to considerable energy savings. The lower noise levels of the thruster also improve the overall onboard experience for crew members.
Technological Advantages of Rim-Drive Thrusters
Leif Vartdal, a hydrodynamics specialist at Kongsberg Maritime, emphasized the advantages of the rim-drive thruster. Its simpler design, with fewer moving parts and superior hydrodynamic characteristics, makes it inherently quieter than traditional thrusters. The technology’s ability to eliminate hydrodynamically induced noise, particularly tip vortex cavitation from propeller blade tips, is a key factor in achieving the Silent-E notation.
A Sustainable and Cost-Effective Solution
Beyond noise reduction, rim-drive thrusters offer additional benefits such as energy savings and reduced maintenance costs. The simplified propulsion system, with fewer mechanical components, enhances operational efficiency and lowers the total cost of ownership. This achievement aligns with Kongsberg Maritime’s commitment to developing environmentally friendly and economically sustainable solutions for the maritime industry.
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Source: Kongsberg
