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Numerical investigation of a novel hybrid wind-wave system and its variable pneumatic chamber volume control
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Abstract(s)
ABSTRACT: This work presents a numerical investigation of a novel control system for a new hybrid wave-wind energy floating platform. It comprises the design of a control system for controlling the variable pneumatic chamber volumes coupled with the hydrodynamics of the floating platform to maximise wave power production. The numerical model is developed in the object-oriented non-casual language Modelica, for which a new module for the control system was integrated into an existing package developed at IST/ULisboa. A sensitivity analysis of the main control parameters in terms of techno-economic parameters is performed and analysed. Results show that the envelope of control parameters’ values for increasing conversion efficiencies and power production is narrow, and an increase of about 30% was achieved with the best case compared with the base case. Moreover, it was observed that the variable volume of the pneumatic chambers shows significant variations on a part of the operational periods typical of the west of Portugal.
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Keywords
Oscillating water column Wind energy Wave energy Hybrid systems Variable pneumatic chamber
Pedagogical Context
Citation
Marreiros, J.P.C & Portillo, J.C.C. (2025). Numerical investigation of a novel hybrid wind-wave system and its variable pneumatic chamber volume control. In: Proceedings EWTEC 2025: European Wave and Tidal Energy Conference, vol. 16, 7-11 Sep. 2025, Funchal, pp. 1110-1-1110-10. https://doi.org/10.36688/ewtec-2025-1110
Publisher
European Wave and Tidal Energy Conference