Abstract
It has currently become an important issue in searching for clean and sustainable renewable energy. Wave power is one of substantial renewable energies. The oscillating water column (OWC) device is the most extensively studies of wave energy converter and the largest number of prototypes so far deployed into the sea. The breakwater-integrated OWC has been constructed successfully in Sakata harbor in Japan, Mutriku port in Spain, and Civitavecchia harbor in Italy etc. The breakwater-integrated OWC has several advantages, especially much easier maintenance of the wave energy plant (Falcão and Henriques, 2016). However, the front wall of typical OWC device may be received large wave force when the storm waves impacted on it. This study proposed an improvement of a caisson type breakwater-integrated OWC device by installing a perforated front wall to reduce the wave impacting on the structure but also to promote the capture efficiency of the wave energy. This study reports the experimental results of both water and air flow characteristics inside the OWC chamber to demonstrate the hydrodynamic performance of the improved OWC device.
Highlights
It has currently become an important issue in searching for clean and sustainable renewable energy
The numerical simulations were implemented by means of CFD software FLOW-3D by considering twofluid model to obtain the water and air flow processes induced by the oscillating water column
The FAVOR technique and the Volume of Fluid (VOF) method to track the two-fluid interfaces were employed for the numerical simulations
Summary
It has currently become an important issue in searching for clean and sustainable renewable energy. EXPERIMENTS The experiments were conducted in the 15 m long, 50 cm wide and 60 cm deep wave flume.
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