Abstract
Interest in water wave power generation, a promising source of renewable energy, is increasing. Numerous types of wave energy converters (WECs) have been designed to transform wave energy into electricity. In this study, we focus on heaving point absorbers (HPAs) of the Wavestar type, which consist of multiple floats connected to a bottom-fixed ocean structure by structural arms and hinges. Each float moves up and down due to wave forces and produces electricity using the hydraulic power take-off (PTO) system connected directly to the float. A numerical procedure using the three-dimensional augmented formulation was developed to calculate the rotational motion of the float. The frequency-dependent coefficients were calculated using the hydrodynamic solver WAMIT. The nonlinear Froude–Krylov and hydrostatic forces were considered. For the environmental conditions, the wave data of four nearshore areas in Korea, obtained from the Korea Meteorological Administration (KMA), were used. Under the given environmental conditions, Buan was found to be the most suitable area among the locations selected for installing a Wavestar-type WEC without considering installation and maintenance costs.
Highlights
Introduction and Bo Woo NamFossil fuels, which are currently the primary energy source used worldwide, are limited in quantity and cause environmental pollution
The oscillating body system normally consists of a floating body that moves with wave motion, a supporting structure, and a power take-off (PTO) system that extracts electrical energy [5,6]
WithFigure suitable environmental conditions were selected to selected for wave data measurements, i.e., Chilbaldo, Oeyeondo, Buan, and install the fixed-platform Wavestar wave energy converters (WECs) [21]
Summary
Introduction and Bo Woo NamFossil fuels, which are currently the primary energy source used worldwide, are limited in quantity and cause environmental pollution. Many types of wave energy converters (WECs) have been developed to transform wave energy into electrical energy. WEC technologies can be classified into three types based on their working principle: oscillating water columns, oscillating body systems, and overtopping converters [3]. Among these types, the oscillating body system normally consists of a floating body that moves with wave motion, a supporting structure, and a power take-off (PTO) system that extracts electrical energy [5,6]. The relative motion between the floating body and a constrained base structure produces electricity in the hydraulic PTO system [7]
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