Oscillating water column (OWC) systems are power generation plants that transform wave kinetic energy into electrical by a surrounded air in chamber changes its pressure through the waves motion. The output spins Wells turbine is linked to doubly fed induction generator (DFIG), flexible devices adjust speed increase efficiency. However, there different nonlinearities associated with these such ...

The oscillating-water-column (OWC) spar-buoy is a type of wave energy converter that may exhibit undesirable large roll and pitch amplitudes caused by dynamic instability induced parametric resonance. occurrence this phenomenon not only reduces the power extraction but significantly increases structural loads on buoy, turbine rotor mooring system. paper compares resonance behaviour two configur...

In this work we present the mathematical model and simulations of a particular wave energy converter, so-called oscillating water column. device, waves governed by one-dimensional nonlinear shallow equations arrive from offshore, encounter step in bottom then into chamber to change volume air activate turbine. The system is reformulated as two transmission problems: one related motion over step...

A numerical study was performed to investigate the applicability of linear decomposition method for hydrodynamic energy conversion an oscillating-water-column type wave converter (OWC-WEC). Hydrodynamic problems OWC chamber were decomposed into excitation and radiation with time-domain based on potential theory. finite element applied solve flow in entire fluid domain including structure. The v...

To develop novel wave energy conversion devices (WECDs) with excellent performance, the relative height and pressure in chambers of square curved oscillating water column (OWC) WECDs were compared through physical model tests, effects regular incident factors, opening length, width, chamber volume on aerodynamic performance capture efficiency (WECE) investigated. The results indicated good for ...