A Review of Offshore Wave Energy Extraction System

Abstract

Offshore wave energy can be easily predicted and is proved to be much better than other forms of ocean energy such as shoreline wave, near-shore wave, and tides. Research on offshore wave energy extraction has been carried out in many countries to meet the growing demand for clean energy and reduce the impact on natural environment. This paper reviews the development of offshore wave energy extraction systems in the recent decade. Several aspects are introduced, including a global wave energy resource assessment, offshore wave energy extraction technologies, and the interaction between wave and floating buoy as well as linear generators. Although various offshore wave energy extraction systems have been proposed and even tested, it is difficult to decide which is the best one. In fact, design of floating buoy and linear generators plays an important role in the operational efficiency of offshore wave energy extraction system. This review provides some useful guidelines for future studies in this field.

The investigation of a segment multi-chamber oscillating water column in physical scale model

“…Flexibility in the choice of the deployment depth and location one of the advantages of the floating device but fixed systems are still preferred on account of their simplicity and they are the focus of the present article [8].…”

“…Another model which operates using the same principle is the Sea-Breath. This is a light attenuator; it is still under development at Padova University, Italy [8]. LEANCON is a multi-chamber device that is arranged in two rows in a V-shaped formation.…”

Hardware-In-the-Loop test rig for the ISWEC wave energy system

“…An increasing number of research institutions, governments, as well as private sector investors are becoming involved in such research subject [1]. The number of devices, based on a wide range of working principles [2][3][4] is growing; some projects already reached a full scale demonstration stage and are moving toward a commercially viable phase, while the growing number of patents is a clear sign of investment in emerging technologies.…”

The wave energy scattering by interaction with the refracted breakwater and varying trench depth

“…One example would be to construct the section of a corner into a slit type, absorbed type, or a curved type. [1][2][3][4] The purpose of this study is to reduce the incident wave energy before it reaches the corner of the breakwater by utilizing the dredged region (trench region). When the high-energy sourced waves pass over the trench with discontinuity water depth, the high wave energy level can be reduced.…”