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http://dx.doi.org/10.7837/kosomes.2022.28.1.168

The Effect of Hydraulic Efficiency on the Design Variables of an Overtopping Wave Energy Converter  

An, Sung-Hwan (Dept. of Ocean System Engineering, Gyeongsang Nat'l Univ)
Kim, Geun-Gon (Dept. of Ocean System Engineering, Gyeongsang Nat'l Univ)
Lee, Jong-Hyun (Dept. of Naval Architecture and Ocean Engineering, Gyeongsang Nat'l Univ)
Publication Information
Journal of the Korean Society of Marine Environment & Safety / v.28, no.1, 2022 , pp. 168-174 More about this Journal
Abstract
In a wave power generation system, the overtopping system is known as an overtopping wave energy converter (OWEC). The performance of an OWEC is affected by wave characteristics such as height and period because its power generation system is sensitive to those characteristics; these, as well as wave direction, depend on the sea. As these characteristics vary, it is hard for the OWEC to produce power in a stable manner. Therefore, it is necessary to find an appropriate shape for an OWEC, according to the characteristics of the sea it is in. This research verified the effect of the design of the OWEC ramp on the hydraulic efficiency using the smoothed particle hydrodynamics (SPH) particle method. A total of 10 models were designed and used in simulations performed by selecting the design parameters of the ramp and changing the attack angle based on those parameters. The hydraulic efficiency was calculated based on the rate of discharged water obtained from the analysis result. The effect of each variable on the overtopping performance according to the shape of the ramp was then confirmed. In this study, we present suggestions for determining the direction for an appropriately shaped OWEC ramp, based on a specific sea area.
Keywords
Overtopping Wave Energy Converter (OWEC); Multi-stage; Smoothed Particle Hydrodynamics (SPH); 2D-Numerical Analysis; Slop angle;
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