Experimental Investigation of the Hydrodynamic Performance of Land-Fixed Nearshore and Onshore Oscillating Water Column Systems with a Thick Front Wall

Energies

Beatriz Edith Vega Serratos¹  Enrique Alejandro Mangas Che¹  Felipe Ernesto Puc Cutz¹  Gregorio Posada Vanegas¹  Ayrton Alfonso Medina Rodríguez²  Edgar Gerardo Mendoza Baldwin²  Rodolfo Silva Casarín² 

[1] EPOMEX Institute, Autonomus University of Campeche, 480 Héroe de Nacozari Ave, Campeche 24079, Mexico;Institute of Engineering, National Autonomous University of Mexico, Circuito Escolar, Mexico City 04510, Mexico;

关键词: wave energy conversion;    oscillating water column;    wave energy converter;    wave basin;    oblique waves;    hydrodynamic performance;   

DOI  :  10.3390/en15072364

来源: DOAJ

【 摘 要 】

Most experimental research on land-fixed Oscillating Water Column (OWC) systems assume that the OWC-water wave interaction happens with waves that propagate normally towards the device. However, the angle of incidence of the waves can determine the performance of the OWC, in particular the wave period at which the device resonates. In this study, an experimental investigation to examine the interaction of regular, oblique, water waves with a land-fixed, thick-front wall OWC device in terms of its hydrodynamic performance is reported. A 1:20 Froude scale was used to replicate a single chamber of the Mutriku Wave Energy Plant (MWEP), and a series of tests were carried out in a spectral wave basin. The goal of this study is to look at how incident wave direction and device location affect the hydrodynamic performance of land-fixed OWC systems in regular wave conditions with varying wave heights. The hydraulic performance includes the assessment of the wave amplification factor, hydrodynamic efficiency, the non-dimensional air pressure inside the chamber and non-dimensional water pressures on the chamber walls. The findings show that, for the nearshore OWC device, the period at which resonance occurs decreases when the incident wave angle increases. For the corresponding wave angles, similar results were found for the onshore and nearshore OWC devices, with a slight frequency shift in the bandwidth of the hydrodynamic efficiency. Furthermore, it was found that when wave height increases, the hydrodynamic efficiency improves for both short and long wave periods, with the exception of the resonance period, where the trend is reversed. Finally, regardless of the location, an OWC device with a thick front wall performs well when interacting with intermediate and long-period waves.

【 授权许可】

Unknown