Numerical Modelling for Coastal Structures Design and Planning. A Case Study of the Venetian Harbour of Chania, Greece (original) (raw)

2018

Wave energy harnessing is associated with high cost, compared to established renewables such as wind and solar. In order to make the technology commercially attractive, electricity production could be coupled with secondary functions, such as coastal defence. An innovative concept is the integration of wave energy converters (WECs) in caisson breakwaters, offsetting the initial high cost of WECs with coastal defence. Here, the functionality of Chania’s Venetian harbour offshore breakwater was assessed under typical wave conditions. We used measurements from a Nortek AWAC ADCP, deployed in the nearshore, to numerically simulate the wave conditions induced by a typical low energy storm (M dir =360 o , H m0 =1 m and T p =5.5 s) inside the Venetian harbour. We employed the Boussinesq-type wave model MIKE 21 BW and simulated cases with and without the breakwater. In both cases, H m0 reached 0.4 m, just inside the harbour’s entrance and, in general, similar wave conditions were observed. ...

Hydraulic and Structural Assessment of a Rubble-Mound Breakwater with a Hybrid Wave Energy Converter

Journal of Marine Science and Engineering, 2021

Seaports’ breakwaters serve as important infrastructures capable of sheltering ships, facilities, and harbour personnel from severe wave climate. Given their exposure to ocean waves and port authorities’ increasing awareness towards sustainability, it is important to develop and assess wave energy conversion technologies suitable of being integrated into seaport breakwaters. To fulfil this goal whilst ensuring adequate sheltering conditions, this paper describes the performance and stability analysis of the armour layer and toe berm of a 1/50 geometric scale model of the north breakwater extension project, intended for the Port of Leixões, with an integrated hybrid wave energy converter. This novel hybrid concept combines an oscillating water column and an overtopping device. The breakwater was also studied without the hybrid wave energy device as to enable a thorough comparison between both solutions regarding structural stability, safety, and overtopping performance. The results p...

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