Abstract
The hybrid non-conventional breakwaters are innovative coastal structures, which have as a primary function the coastal and harbours protection, but with the important benefit of electricity production, due to their combination with Wave Energy Converters. The most recent example of a non-conventional breakwater is called OBREC, standing for Overtopping Breakwater for Energy Conversion (Vicinanza et al., 2014). The device consists of a traditional rubble mound breakwater, in which the seaward armour layer in the upper part is replaced with a frontal sloping ramp and a reservoir. The structure is designed to capture and gather the water that overtops the crest ramp. The potential energy of the water stored in the reservoir is converted into kinetic energy and then into electrical energy by flowing through low head hydraulic turbines coupled with generators, exploiting the different water levels between the reservoir and the sea level.
Highlights
The hybrid non-conventional breakwaters are innovative coastal structures, which have as a primary function the coastal and harbours protection, but with the important benefit of electricity production, due to their combination with Wave Energy Converters
The comparison between the laboratory and numerical data shows that the model is able to simulate the waveOBREC interaction, in terms of the water surface elevation in front of the structure, wave reflection and wave loading exerting on the device
NUMERICAL MODEL the hydraulic performances of the OBREC has been tested in two physical model test campaigns (Vicinanza et al, 2014, Contestabile et al, 2017) and a full scale prototype is currently under monitoring, a numerical analysis is carried out with the aim to attain a deeper understanding of the wave-structure interaction phenomena
Summary
The hybrid non-conventional breakwaters are innovative coastal structures, which have as a primary function the coastal and harbours protection, but with the important benefit of electricity production, due to their combination with Wave Energy Converters. Numerical results are here validated through a direct time series comparison with the signals measured in the laboratory test.
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