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Publications
Arias D., Gadelho, J.F.M. and Guedes Soares, C. (2025), Numerical simulations evaluating the influence of different geometric features in the pneumatic efficiency of OWC devices, Innovations in Renewable Energies Offshore, Guedes Soares, C. & Wang S. (Ed.), Taylor and Francis Group, London, UK, 249-256.
This study employs OpenFOAM to perform a hydrodynamic analysis of a scaled Oscillating Water Column (OWC) system, previously validated by experimental models. The analysis investigates the im-pact of various geometric features, including a stepped entrance, higher damping in the Power Take-Off (PTO) mechanism, and a double chamber configuration, on the system's pneumatic performance and Response Am-plitude Operators (RAOs). These configurations are tested across different regular wave periods to assess their effectiveness in enhancing energy conversion efficiency. The results reveal that incorporating a stepped en-trance significantly improves RAOs and pneumatic efficiency, particularly at shorter wave periods. In contrast, higher PTO damping reduces RAOs but, when combined with a stepped entrance, maintains high efficiency across a broader range of wave periods. Double chamber systems, especially those with stepped entrances, demonstrate superior pneumatic efficiency, underscoring the importance of geometric optimization and damp-ing control in advancing OWC system performance for renewable energy applications.
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