Wind Propulsion: A Key to Decarbonizing the Shipping Industry
A recent study reveals the significant potential of wind propulsion technology in reducing carbon emissions within the shipping industry. Conducted by the Tyndall Centre for Climate Change Research and commissioned by the Brussels-based NGO Seas At Risk, the research emphasizes that retrofitting the majority of the global merchant fleet with wind-assisted propulsion could play a crucial role in achieving international climate goals. Currently, the global merchant fleet consists of approximately 60,000 vessels over 1,000 gross tonnes, yet only around 100 of these ships have adopted wind propulsion solutions, such as Flettner rotors, suction sails, and wing sails.
The study highlights that wind propulsion can lead to a fuel consumption reduction of 6.3 to 9.4 percent across all suitable vessels. This translates to a potential 7.8 percent decrease in annual CO₂ emissions by 2050, equating to an impressive cumulative savings of up to 760 million tonnes of CO₂. The slow adoption of wind propulsion in the shipping sector is concerning, especially as alternative renewable e-fuels may not become viable at scale until the 2040s.
Modeling Emissions and Identifying Opportunities
The research team analyzed main engine emissions across the global fleet, focusing on 25 ship types that account for around 60 percent of global shipping emissions. By utilizing real voyage data spanning 1.74 billion kilometers from 2024, they calculated annual fuel and emissions savings for over 34,000 vessels. The findings indicate that fuel consumption reductions can vary from 1 to 12.5 percent, depending on the type of ship and the number of sails installed.
Bulk carriers and tankers emerged as the most promising candidates for wind propulsion, given their expansive deck space. Implementing wind propulsion systems on these two ship types alone could yield 50 percent of the total emissions savings identified in the study. The estimates provided are conservative; the actual potential for emissions reduction could be even greater when combined with optimization strategies such as weather routing, slow steaming, and efficient hull designs for new builds.
Anaïs Rios, Senior Shipping Policy Officer at Seas At Risk, emphasized the urgency of adopting wind propulsion. “The ships needed to reach 2030 climate targets are already at sea and they can be powered by wind. Retrofitting sails cuts fuel use and emissions now, while alternative fuels remain decades away from being available at scale,” she stated. Rios further asserted that wind propulsion is not merely a future prospect; it is a technology that can be deployed immediately to help mitigate the environmental impact of shipping.
