A green technology for maritime sustainability

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The ship with retractable flapping foils. Credit: Renewable and Sustainable Energy Reviews (2023). DOI: 10.1016/j.rser.2023.113589

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The ship with retractable flapping foils. Credit: Renewable and Sustainable Energy Reviews (2023). DOI: 10.1016/j.rser.2023.113589

A new form of wave devouring propulsion (WDP) could power ships and help to cut greenhouse gas emissions in the maritime industry. Academics from Cranfield University have worked on the concept of using wave energy for propulsion and designed an inventive method of achieving greater thrust from the power of the waves by harnessing a vessel’s submerged flapping foils in an innovative way.

The study is published in the journal Renewable and Sustainable Energy Reviews.

Taking inspiration from the power of a whale’s fins, the team studied the structure and movement of the tail fin to unravel how it effectively uses for propulsion. Through simulations and experiments, they developed and integrated a simplified version of the whale’s tail fin action into a ship’s power system.

WDP technology offers a range of benefits, making it a compelling solution for the marine industry. Not only does it reduce , it also significantly enhances marine craft propulsion. This can find applications in small, unmanned vessels and can be seamlessly integrated into hybrid propulsion systems, including those powered by electricity, hydrogen, or fossil fuels. It also has the potential to achieve carbon reduction targets and contribute to the sustainable development goals of the shipping industry.

Dr. Liang Yang, lecturer in marine renewable energy systems at Cranfield University, led the research and said, “Wave Devouring Propulsion (WDP) could act as a transformative force in maritime sustainability. Our research pioneers a novel approach to propel ships using the boundless energy of waves. We’re not just reducing emissions; we’re navigating towards a future where carbon reduction targets are met, and the shipping industry aligns with sustainable development goals.”

More information:
Jingru Xing et al, Wave devouring propulsion: An overview of flapping foil propulsion technology, Renewable and Sustainable Energy Reviews (2023). DOI: 10.1016/j.rser.2023.113589

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