This paper deals with a new U-OWC (Oscillating Water Column) device, called REWEC3 (Resonant Wave Energy Converter – Realization 3), which is able to easily obtain a natural resonance with random wind-generated waves, allowing to absorb a large amount of wave energy. A prototype of this kind of breakwater has been planned to be realized in the Salerno’s harbor (Italy) in Tyrrhenian Sea for the enlargement of the pre-existent breakwater (for a total length of 200m). In the paper the peculiarities of the REWEC3 devices, which are able to increase the hydrodynamics performances of the system with respect to traditional OWC plants, will be discussed. Then, the configuration of REWEC3 caisson breakwaters designed for the Salerno’s harbor will be analyzed, giving the performance of the plant in terms both of wave absorption and electrical production.
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