Bureau Veritas (BV), a world leader in testing, inspection, and certification, has delivered an Approval in Principle (AiP) to Zéphyr & Borée for its first open-top 1,800 TEU containership, demonstrating the feasibility of using wind-propelled wing-sails on this type of vessel.
The 185 meter-long container vessel is designed with five cargo holds, mostly open-top. Propulsion means are compliant with IMO’s Tier III requirements, and the vessel is equipped with shaft generators and a heat recovery system that minimizes fuel consumption.
The vessel’s propulsion system will be assisted by eight sails provided by CWS (Computed Wing Sails). The design is a thick, asymmetrical wing-sail that can be steered to catch port and starboard winds, and adjusts itself automatically depending on the wind conditions to ensure optimal savings.
In the race to decarbonize their fleet, many shipowners are researching alternative propulsion methods as a way to improve the energy efficiency of their vessels and reduce their emissions. Among emerging options, wind-assisted propulsion is considered a strong contender for achieving significant emissions reduction, using a free, clean and renewable energy source available worldwide.
BV was involved from the very early stage of the design. The main design principles were reviewed in order to ensure the feasibility of the concept and identify any obstacles. The AiP confirms the design’s compliance with the most recent BV notations, including NR 206 on Wind Propulsion systems.