The hydrodynamic performance of a stationary cylindrical dual-chamber Oscillating Water Column (OWC) wave energy device was experimentally studied to assess conversion efficiency in comparison with single-chamber OWC. contribution the present work is guide design and optimization OWC for efficiently capturing offshore energy. effects various parameters including steepness, opening ratio, inner- outer-chamber drafts on proposed were considered. It found that increases by one. A coupled...

Based upon previous research on a single, high-efficiency Oscillating Water Column (OWC) wave energy capture system (Mayon et al., 2021), this work further extends the numerical investigation to layout design and performance of convertor (WEC) array coupled with parabolic, concentrating wall in both regular irregular incident conditions. A heuristic method identify optimal siting component, cylindrical OWC WECs array, installed concave opening is presented. The most advantageous location...

• Wave focussing by a parabolic reflector wall to point sink is demonstrated. A cylindrical Oscillating Water Column located at the parabola focal point. 650% energy harvesting efficiency realised proposed configuration. The wave capture bandwidth significantly enhanced using this design. (OWC) one of most popular Energy Convertor (WEC) technologies, but conversion still very low and bottleneck limit its application commercialization. novel OWC system comprising WEC was revolutionary...

The integration of wave energy converters (WECs) with a breakwater can reduce construction and maintenance costs enhance the conversion performance WECs. Intelligent use parabolic to focus water waves specific region significantly increase available energy. However, theoretically calculated focal point may not always coincide observed focusing position. To determine actual position for installing WEC, both numerical simulations experimental research are conducted investigate hydrodynamic...

The efficiency response of an oscillating water column (OWC) wave energy converter is analysed by adopting a numerical approach and using various stepped bottom configurations for the seabed. A two-dimensional, fully non-linear higher-order boundary element method (HOBEM) model developed to simulate hydrodynamic characteristics fluid structure interaction fixed OWC located in flume. number tests are conducted regular incident conditions modifying amplitudes wavelengths. measured free surface...

The hydrodynamic response of a land-based oscillating water column (OWC) wave energy converter under various irregular conditions is investigated numerically. Based on the potential flow theory, two-dimensional fully nonlinear numerical flume (NWF) developed to model characteristics using time-domain higher-order boundary element method (HOBEM). inner-domain sources and JONSWAP spectrum used generate incident waves, linear pneumatic determine pressure inside chamber. free surface elevations...

The dynamic performance of a typical land-fixed oscillating water column (OWC) wave energy converter (WEC) under solitary waves (SW) is experimentally and numerically investigated. Both two-dimensional (2-D) three-dimensional (3-D) numerical models are considered in the present study. air orifices OWC chamber 2-D 3-D represented by narrow rectangular opening circular opening, respectively, with same ratio (i.e., cross-area between chamber). It found that overflow orifice occurs when height...

As the siting of wind turbines increasingly transitions from shallow water to offshore deep-water locations, improving platform stability floating is becoming a growing concern. By coupling porous shell commonly used in traditional marine structures, with FOWT (floating turbine platform), new spar-buoy was designed. A numerical model investigating effect aero-hydro-mooring system developed, and results motion response are compared OC3-Hywind spar. The two platforms simulated time-domain...

The hydrodynamic performance of a land-fixed oscillating water column (OWC) wave energy device was thoroughly investigated under various conditions and geometric parameters through both experimental numerical studies in three-dimensional (3D) tank. study involved the measurement comparison surface elevation, air pressure OWC chamber, efficiency with results obtained from 3D Higher-Order Boundary Element Method (HOBEM). influences effects, incident amplitude, front wall draught, angle on were...

Abstract A novel semi-submersible platform is proposed for 5 MW wind turbines. This concept focuses on an integrated system formed by combining porous shells with a platform. coupled aerodynamic–hydrodynamic–mooring analysis of the new performed. The motion responses and traditional are compared. differences in hydrodynamic performance between two platforms also evaluated. influence geometric parameters (porosity, diameter, wall thickness) response behavior studied. Overall, exhibits...

Abstract A hybrid, porous breakwater—Oscillating Water Column (OWC) Wave Energy Converter (WEC) system is put forward and its hydrodynamic performance investigated using the fully nonlinear, open-source computational fluid dynamics (CFD) model, OpenFOAM. The permeable structure positioned at weather side of OWC device adjoined to front wall. numerical modelling approach employed in which interstices within are explicitly defined. This permits flow field development wall be observed. WEC...