Wave power

About: Wave power is a research topic. Over the lifetime, 2671 publications have been published within this topic receiving 41439 citations. The topic is also known as: wind wave energy & sea wave energy.

Wave power generating apparatus

Abstract: The present invention relates to a wave power generating apparatus which drives a generator using the tidal motion and wave energy of the tide to produce electrical energy. More particularly, the present invention relates to a wave power generating apparatus which generates power by transferring rotating force to a power-transmission shaft when a float moves upward by means of the upward and downward motion of a wave, and which generates power by transferring the motive energy of the float produced by the lateral force of the wave.

Wave Energy Resource Analysis for Use in Wave Energy Conversion

Abstract: In order to correctly predict and evaluate the response of wave energy converters (WECs), an accurate representation of wave climate resource is crucial. This paper gives an overview of wave resource modeling techniques and applies a methodology to estimate the naturally available and technically recoverable resource in a given deployment site. The methodology was initially developed by the Electric Power Research Institute (EPRI), which uses a modified Gamma spectrum to interpret sea state hindcast parameter data produced by National Oceanic and Atmospheric Administrations (NOAA’s) Wavewatch III. This Gamma spectrum is dependent on the calibration of two variables relating to the spectral width parameter and spectral peakedness parameter. In this study, this methodology was revised by the authors to increase its accuracy in formulating wave length. The revised methodology shows how to assess a given geographic area’s wave resource based on its wave power density and total annual wave energy flux. [DOI: 10.1115/1.4028880]

Reversal in Longshore Sediment Transport without Variations in Wave Power Direction

Abstract: MUNOZ-PEREZ, J.J.; CABALLERO, I.; TEJEDOR, B., and GOMEZ-PINA, G., 2010. Reversal in longshore sediment transport without variations in wave power direction. Journal of Coastal Research, 26(4), 780-786. West Palm Beach (Florida), ISSN 0749-0208. The mouth of the Guadiaro River (SW Spain), oriented in a NE-SW direction, is often closed, resulting in environmental, social, and economic problems. An analysis of the factors influencing this phenomenon was performed using the Coastal Modeling System, a numerical model based on the mild slope equation (waves, currents, and sediment transport), and a coastal evolution study was performed comparing aerial photographs to the monitoring campaigns carried out in 2005 and 2006 (topographic surveys, current meters, tidal gauges, and water quality parameters). Global transport at the Spanish south Mediterranean coast occurs in a southwestern direction. However, the spit that closes the Guadiaro River grows in the opposite direction. The points and conditions where transport direction changes occur along the coastline were identified. The results, obtained from 200 different propagations, were consistent with field data, showing that northeastern littoral transport during easterly waves was sufficient to block the river mouth. Furthermore, significant differences in sediment transport patterns were found despite the existence of a fixed wave power direction. Through this research we also learned that use of wave propagation numerical models by nonexperts is prone to error, as small variations in input parameters can induce dramatically different results that may be contradictory in certain bathymetric configurations.

Wave Refraction Near San Pedro Bay, California

Abstract: A numerical procedure for calculation and plotting of wave refraction diagrams was applied to the San Pedro Bay area, California. Waves from all major directions with periods of 15 sec, 30 sec, 60 sec, and longer were considered in the computation. The results are presented in the form of refraction diagrams and contour diagrams of equal wave heights and compared with previous available graphical analyses. It was found that the San Pedro Bay and the Los Angeles-Long Beach Harbor complex is protected from severe wave attacks by the presence of offshore islands which serve as natural wave barriers so that waves would either break on them or diffract around them resulting in reduction of wave energy. The degree of protection afforded by the offshore islands varies with the direction and periods of incoming waves; this is discussed in detail.

Study of an Altered Magnetic Circuit of a Permanent Magnet Linear Generator for Wave Power

Abstract: The wave energy converter (WEC) studied and developed at Uppsala University in Sweden is a point absorbing buoy connected to a linear generator (LG) on the seabed. Previous studies have improved th ...