Wave energy has been considered to be one of the most promising energy resources fir the future because it is pollution-free and abundant natural resource. However, since it has drawbacks of low and non-stationary energy density, it is necessary to change the form of its simple concentrated energy in order to put it to good use. Advancing waves in a coastal area can be amplified, swashed and overtopped by a wave overtopping control structure, and by conserving the quantity of overflow in a reservoir, the kinetic energy of the waves can be converted to potential energy with a static head above the mean sea level. The potential energy in the form of static head can be utilized to produce electric power as in hydroelectric power generation. This study aims to find the most suitable shape of wave overtopping structure for maximum overtopping quantity, and for this purpose, we carried out wave overtopping experiments in a wave tank under both regular and irregular wave conditions.
The technology of electric power generation, utilizing the renewable clean energy of the ocean, is perceived as one of the very important tools for the development of an alternative energy source to overcome environmental pollution as well as the exhaustion of resources caused by the excessive use of fossil fuels. Various energy resources exist in the ocean as waves, tides, currents, winds, water temperature and so on, and recent investigations on the extracting technologies of those energies are actively under way, owing to the necessity of exploitation of substitute energy sources. Wave energy has an abundant supply of resources since waves have a worldwide distribution. It also is a convincing alternative energy source for the coast of Korea which has the topographical characteristics of a peninsula.