Abstract
The influence of the central platform on hydrodynamic performance of a wave energy converter (WEC) has remained elusive. To approach this dearth of relevant theoretical research, this paper presents a semi-submerged multi-buoy WEC and the results of the numerical analysis at different dimension parameters of the central platform of the WEC. The WEC consists of three oscillating buoys hinged with a central platform through multiple actuating arms. Numerical analysis revealed that there exists a relationship between the hydrodynamic performance of device and the geometry of the central platform. At the given wave condition, different central platform size would obviously affect the hydrodynamic performance and wave energy capture width ratio of the semi-submerged multi-buoy WEC. Additionally, appropriately increasing central platform draft would help to improve the wave energy capture capability of the oscillating buoys.
Highlights
Due to the urgency to act against climate change caused by the growing carbon dioxide in the atmosphere, renewable energy has received extensive attention around the world [1]
We investigate the hydrodynamic performance of the device in different damping layer aspect ratios, cross-sectional areas, heights, and drafts of the central platform
Based on the research above, the following conclusions can be drawn: (1) There exists a relationship between the hydrodynamic performance of the wave energy converter (WEC) and the geometry of central platform
Summary
Due to the urgency to act against climate change caused by the growing carbon dioxide in the atmosphere, renewable energy has received extensive attention around the world [1]. The research on wave energy conversion started in the 1970s when the oil crises provoked the exploitation of a wide variety of renewable energy sources. An advantage of wave energy technology is the wide diversity of design concepts. Different technologies use different solutions to harness energy from sea waves and are suited to operate at different water depths and locations [3]. A multi-buoy wave energy converter (WEC) primarily consists of three parts: a central platform, multiple oscillating bodies, and multiple actuating arms [4]. The multi-buoy WEC can be classified into three types: stationary type, floating type, and semi-submerged type
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