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Prof. Diego Vicinanza
Università degli studi della Campania "L. Vanvitelli", Dipartimento di Ingegneria

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0 Coastal Engineering
0 Coastal Zone Management
0 marine renewable energy
0 Coastal morphodynamics
0 Coastal hydrodynamics

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Journal article
Published: 30 July 2021 in Energies
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Overtopping-type wave power conversion devices represent one of the most promising technology to combine reliability and competitively priced electricity supplies from waves. While satisfactory hydraulic and structural performance have been achieved, the selection of the hydraulic turbines and their regulation is a complex process due to the very low head and a variable flow rate in the overtopping breakwater set-ups. Based on the experience acquired on the first Overtopping BReakwater for Energy Conversion (OBREC) prototype, operating since 2016, an activity has been carried out to select the most appropriate turbine dimension and control strategy for such applications. An example of this multivariable approach is provided and illustrated through a case study in the San Antonio Port, along the central coast of Chile. In this site the deployment of a breakwater equipped with OBREC modules is specifically investigated. Axial-flow turbines of different runner diameter are compared, proposing the optimal ramp height and turbine control strategy for maximizing system energy production. The energy production ranges from 20.5 MWh/y for the smallest runner diameter to a maximum of 34.8 MWh/y for the largest runner diameter.

ACS Style

Antonio Mariani; Gaetano Crispino; Pasquale Contestabile; Furio Cascetta; Corrado Gisonni; Diego Vicinanza; Andrea Unich. Optimization of Low Head Axial-Flow Turbines for an Overtopping BReakwater for Energy Conversion: A Case Study. Energies 2021, 14, 4618 .

AMA Style

Antonio Mariani, Gaetano Crispino, Pasquale Contestabile, Furio Cascetta, Corrado Gisonni, Diego Vicinanza, Andrea Unich. Optimization of Low Head Axial-Flow Turbines for an Overtopping BReakwater for Energy Conversion: A Case Study. Energies. 2021; 14 (15):4618.

Chicago/Turabian Style

Antonio Mariani; Gaetano Crispino; Pasquale Contestabile; Furio Cascetta; Corrado Gisonni; Diego Vicinanza; Andrea Unich. 2021. "Optimization of Low Head Axial-Flow Turbines for an Overtopping BReakwater for Energy Conversion: A Case Study." Energies 14, no. 15: 4618.

Journal article
Published: 17 June 2021 in Energies
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New large-scale laboratory data are presented on a physical model of a spar buoy wind turbine with angular motion of control surfaces implemented (pitch control). The peculiarity of this type of rotating blade represents an essential aspect when studying floating offshore wind structures. Experiments were designed specifically to compare different operational environmental conditions in terms of wave steepness and wind speed. Results discussed here were derived from an analysis of only a part of the whole dataset. Consistent with recent small-scale experiments, data clearly show that the waves contributed to most of the model motions and mooring loads. A significant nonlinear behavior for sway, roll and yaw has been detected, whereas an increase in the wave period makes the wind speed less influential for surge, heave and pitch. In general, as the steepness increases, the oscillations decrease. However, higher wind speed does not mean greater platform motions. Data also indicate a significant role of the blade rotation in the turbine thrust, nacelle dynamic forces and power in six degrees of freedom. Certain pairs of wind speed-wave steepness are particularly unfavorable, since the first harmonic of the rotor (coupled to the first wave harmonic) causes the thrust force to be larger than that in more energetic sea states. The experiments suggest that the inclusion of pitch-controlled, variable-speed blades in physical (and numerical) tests on such types of structures is crucial, highlighting the importance of pitch motion as an important design factor.

ACS Style

Sara Russo; Pasquale Contestabile; Andrea Bardazzi; Elisa Leone; Gregorio Iglesias; Giuseppe Tomasicchio; Diego Vicinanza. Dynamic Loads and Response of a Spar Buoy Wind Turbine with Pitch-Controlled Rotating Blades: An Experimental Study. Energies 2021, 14, 3598 .

AMA Style

Sara Russo, Pasquale Contestabile, Andrea Bardazzi, Elisa Leone, Gregorio Iglesias, Giuseppe Tomasicchio, Diego Vicinanza. Dynamic Loads and Response of a Spar Buoy Wind Turbine with Pitch-Controlled Rotating Blades: An Experimental Study. Energies. 2021; 14 (12):3598.

Chicago/Turabian Style

Sara Russo; Pasquale Contestabile; Andrea Bardazzi; Elisa Leone; Gregorio Iglesias; Giuseppe Tomasicchio; Diego Vicinanza. 2021. "Dynamic Loads and Response of a Spar Buoy Wind Turbine with Pitch-Controlled Rotating Blades: An Experimental Study." Energies 14, no. 12: 3598.

Journal article
Published: 12 January 2021 in Water
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Vortex drop shafts are special manholes designed to link sewer channels at different elevations. Significant energy head dissipation occurs across these structures, mainly due to vertical shaft wall friction and turbulence in the dissipation chamber at the toe of the shaft. In the present study two aspects, sometimes neglected in the standard hydraulic design, are considered, namely the energy head dissipation efficiency and the maximum pressure force in the dissipation chamber. Different physical model results derived from the pertinent literature are analyzed. It is demonstrated that the energy head dissipation efficiency is mostly related to the flow impact and turbulence occurring in the chamber. Similarly to the drop manholes, a relation derived from a simple theoretical model is proposed for the estimation of the energy head loss coefficient. The analysis of the pressures measured on the chamber bottom allows to provide a useful equation to estimate the pressure peak in the chamber as a function of the approach flow energy head.

ACS Style

Gaetano Crispino; Pasquale Contestabile; Diego Vicinanza; Corrado Gisonni. Energy Head Dissipation and Flow Pressures in Vortex Drop Shafts. Water 2021, 13, 165 .

AMA Style

Gaetano Crispino, Pasquale Contestabile, Diego Vicinanza, Corrado Gisonni. Energy Head Dissipation and Flow Pressures in Vortex Drop Shafts. Water. 2021; 13 (2):165.

Chicago/Turabian Style

Gaetano Crispino; Pasquale Contestabile; Diego Vicinanza; Corrado Gisonni. 2021. "Energy Head Dissipation and Flow Pressures in Vortex Drop Shafts." Water 13, no. 2: 165.

Editorial
Published: 17 September 2020 in Water
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This paper intends to offer the readers an overview of the Special Issue on Coastal Vulnerability and Mitigation Strategies: From Monitoring to Applied Research. The main focus of this Special Issue is to provide the state-of-the-art and the recent research updates on the sustainable management strategies for protecting vulnerable coastal areas. Based on 28 contributions from authors from 17 different countries (Australia, China, Ecuador, Germany, Greece, India, Italy, Mexico, The Netherlands, New Zealand, Poland, Spain, Sri Lanka, Taiwan, United Arab Emirates, UK, USA), an ensemble of interdisciplinary articles has been collected, emphasizing the importance of tackling technical and scientific problems at different scales and from different point of views.

ACS Style

Pasquale Contestabile; Diego Vicinanza. Coastal Vulnerability and Mitigation Strategies: From Monitoring to Applied Research. Water 2020, 12, 2594 .

AMA Style

Pasquale Contestabile, Diego Vicinanza. Coastal Vulnerability and Mitigation Strategies: From Monitoring to Applied Research. Water. 2020; 12 (9):2594.

Chicago/Turabian Style

Pasquale Contestabile; Diego Vicinanza. 2020. "Coastal Vulnerability and Mitigation Strategies: From Monitoring to Applied Research." Water 12, no. 9: 2594.

Journal article
Published: 01 September 2020 in Journal of Waterway, Port, Coastal, and Ocean Engineering
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This work aims to enhance the evidence base of extreme impact loads on the front (outer) wall and within the chamber of an oscillating water column (OWC) integrated into a vertical breakwater. Data are from large-scale physical model tests (at 1:9 scale) at the large wave channel (GWK). The paper shows that established prediction methods for nonimpulsive and impulsive wave loads for conventional vertical breakwaters can be applied to the front wall of OWC breakwaters. For the first time, impact loads within the OWC chamber have been quantified, on the rear in-chamber wall and on the chamber ceiling. These are found to reach magnitudes comparable to front wall wave impacts. Novel video records from within the OWC chamber provide new insight on water column behavior, including three different classifications identified as “single,” “successional,” and “water column” ceiling impacts. Conditions at risk of violent impacts within the chamber are also identified. These will be valuable in quantifying front (outside) design forces, in-chamber impacts, and in seeking to minimize in-chamber impacts occurrence, in construction and in operational phases.

ACS Style

Krisna A. Pawitan; Diego Vicinanza; William Allsop; Tom Bruce. Front Wall and In-Chamber Impact Loads on a Breakwater-Integrated Oscillating Water Column. Journal of Waterway, Port, Coastal, and Ocean Engineering 2020, 146, 04020037 .

AMA Style

Krisna A. Pawitan, Diego Vicinanza, William Allsop, Tom Bruce. Front Wall and In-Chamber Impact Loads on a Breakwater-Integrated Oscillating Water Column. Journal of Waterway, Port, Coastal, and Ocean Engineering. 2020; 146 (5):04020037.

Chicago/Turabian Style

Krisna A. Pawitan; Diego Vicinanza; William Allsop; Tom Bruce. 2020. "Front Wall and In-Chamber Impact Loads on a Breakwater-Integrated Oscillating Water Column." Journal of Waterway, Port, Coastal, and Ocean Engineering 146, no. 5: 04020037.

Journal article
Published: 03 August 2020 in Water
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The area of Bagnoli (Gulf of Naples, central Tyrrhenian Sea) has been heavily exposed to pollution for over a century due to the presence of industrial sites along its coastline. The aim of this study is to analyze contaminant concentrations (i.e., heavy metals and hydrocarbons) in seabed sediments through a statistical multivariate approach. Multivariate methods permit us to describe the pollution dynamics affecting the area and distinguish between anthropogenic and natural pollution sources. Additionally, the association between contamination patterns and the wave climate characteristics of the gulf (i.e., wave period, direction, height, power, and energy) is investigated. The study confirms that the main contamination source in the Bagnoli bay is anthropogenic activities (i.e., former steel plant and sewage discharges) for the majority of investigated pollutants. It also provides evidence, however, for the potential co-existence of multiple anthropogenic and geogenic sources of arsenic and other metals that may be originating also from the water-rock interaction and submarine volcanic emissions in the Phlegraean area.

ACS Style

Sara Giglioli; Loris Colombo; Pasquale Contestabile; Luigi Musco; Giovanna Armiento; Renato Somma; Diego Vicinanza; Arianna Azzellino. Source Apportionment Assessment of Marine Sediment Contamination in a Post-Industrial Area (Bagnoli, Naples). Water 2020, 12, 2181 .

AMA Style

Sara Giglioli, Loris Colombo, Pasquale Contestabile, Luigi Musco, Giovanna Armiento, Renato Somma, Diego Vicinanza, Arianna Azzellino. Source Apportionment Assessment of Marine Sediment Contamination in a Post-Industrial Area (Bagnoli, Naples). Water. 2020; 12 (8):2181.

Chicago/Turabian Style

Sara Giglioli; Loris Colombo; Pasquale Contestabile; Luigi Musco; Giovanna Armiento; Renato Somma; Diego Vicinanza; Arianna Azzellino. 2020. "Source Apportionment Assessment of Marine Sediment Contamination in a Post-Industrial Area (Bagnoli, Naples)." Water 12, no. 8: 2181.

Journal article
Published: 07 July 2020 in Water
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In this paper, the advantages of shaping a non-conventional triple collocation-based calibration of a wave propagation model is pointed out. Illustrated through a case study in the Bagnoli-Coroglio Bay (central Tyrrhenian Sea, Italy), a multi-comparison between numerical data and direct measurements have been carried out. The nearshore wave propagation model output has been compared with measurements from an acoustic Doppler current profiler (ADCP) and an innovative low-cost drifter-derived GPS-based wave buoy located outside the bay. The triple collocation—buoy, ADCP and virtual numerical point—make possible an implicit validation between instrumentations and between instrumentation and numerical model. The procedure presented here advocates for an alternative “two-step” strategy. Indeed, the triple collocation technique has been used solely to provide a first “rough” calibration of one numerical domain in which the input open boundary has been placed, so that the main wave direction is orthogonally aligned. The need for a fast and sufficiently accurate estimation of wave model parameters (first step) and then an ensemble of five different offshore boundary orientations have been considered, referencing for a more detailed calibration to a short time series of a GPS-buoy installed in the study area (second step). Such a stage involves the introduction of an enhancement factor for the European Centre for Medium-Range Weather Forecasts (ECMWF) dataset, used as input for the model. Finally, validation of the final model’s predictions has been carried out by comparing ADCP measurements in the bay. Despite some limitations, the results reveal that the approach is promising and an excellent correlation can be found, especially in terms of significant wave height.

ACS Style

Pasquale Contestabile; Fabio Conversano; Luca Centurioni; Umberto Mario Golia; Luigi Musco; Roberto Danovaro; Diego Vicinanza. Multi-Collocation-Based Estimation of Wave Climate in a Non-Tidal Bay: The Case Study of Bagnoli-Coroglio Bay (Tyrrhenian Sea). Water 2020, 12, 1936 .

AMA Style

Pasquale Contestabile, Fabio Conversano, Luca Centurioni, Umberto Mario Golia, Luigi Musco, Roberto Danovaro, Diego Vicinanza. Multi-Collocation-Based Estimation of Wave Climate in a Non-Tidal Bay: The Case Study of Bagnoli-Coroglio Bay (Tyrrhenian Sea). Water. 2020; 12 (7):1936.

Chicago/Turabian Style

Pasquale Contestabile; Fabio Conversano; Luca Centurioni; Umberto Mario Golia; Luigi Musco; Roberto Danovaro; Diego Vicinanza. 2020. "Multi-Collocation-Based Estimation of Wave Climate in a Non-Tidal Bay: The Case Study of Bagnoli-Coroglio Bay (Tyrrhenian Sea)." Water 12, no. 7: 1936.

Journal article
Published: 14 May 2020 in International Marine Energy Journal
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The 13th EWTEC Conference was held in the beautiful and ancient city of Naples and was organized by CONISMA (National Inter-University Consortium for Marine Sciences) from 1th to 6th Sept. 2019.

ACS Style

Diego Vicinanza. Preface to the special issues of the Thirteenth European Wave and Tidal Energy Conference (EWTEC 2019). International Marine Energy Journal 2020, 3, 1 .

AMA Style

Diego Vicinanza. Preface to the special issues of the Thirteenth European Wave and Tidal Energy Conference (EWTEC 2019). International Marine Energy Journal. 2020; 3 (1):1.

Chicago/Turabian Style

Diego Vicinanza. 2020. "Preface to the special issues of the Thirteenth European Wave and Tidal Energy Conference (EWTEC 2019)." International Marine Energy Journal 3, no. 1: 1.

Journal article
Published: 10 May 2020 in Coastal Engineering
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This paper presents an innovative vertical breakwater cross-section integrating an overtopping wave energy converter, named OBREC-V, and the analysis of its hydraulic performance and stability response to hydraulic loading. The structure is composed of a vertically-faced caisson with a sloping ramp on the top, a reservoir and a set-back crown-wall. The analysis of the structure is carried out by performing numerical simulations based on the Volume-Averaged Reynolds Averaged Navier-Stokes (VARANS) equations. The numerical simulations are performed to compare the performance of a traditional and innovative vertical caissons under the action of irregular waves, in terms of wave reflection, overtopping and wave acting forces. Results show that the reflection coefficients are lower than those computed in front of the traditional breakwater, with a reduction of up to the 40%. New formulations are proposed to better estimate the reflection coefficient and the wave overtopping at the rear side of the structure taking into account the non-conventional geometry of the device. The analysis of the forces indicate that the non-conventional geometry of the innovative OBREC-caisson increases the overall stability of the structure. The values of the safety factor against sliding, Cs, on innovative caissons are similar or greater than those calculated on the traditional vertical structure for almost all the tests. The downward force on the ramp and reservoir and the time lag between the vertical and horizontal forces, lead to a significant reduction of the maximum destabilizing forces Fs in the innovative breakwater, whose values range between 60 and 80% of the ones computed on the traditional structure. The obtained results show the co-benefits, in terms of functionality and hydraulic stability, that an OBREC-V entails with respect to a traditional vertical breakwater.

ACS Style

Enrico Di Lauro; Maria Maza; Javier L. Lara; Inigo J. Losada; Pasquale Contestabile; Diego Vicinanza. Advantages of an innovative vertical breakwater with an overtopping wave energy converter. Coastal Engineering 2020, 159, 103713 .

AMA Style

Enrico Di Lauro, Maria Maza, Javier L. Lara, Inigo J. Losada, Pasquale Contestabile, Diego Vicinanza. Advantages of an innovative vertical breakwater with an overtopping wave energy converter. Coastal Engineering. 2020; 159 ():103713.

Chicago/Turabian Style

Enrico Di Lauro; Maria Maza; Javier L. Lara; Inigo J. Losada; Pasquale Contestabile; Diego Vicinanza. 2020. "Advantages of an innovative vertical breakwater with an overtopping wave energy converter." Coastal Engineering 159, no. : 103713.

Journal article
Published: 05 May 2020 in Sustainability
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With the approaching end of the productive lives of offshore oil and gas platforms, the issue about decommissioning and what to do with existing structures arises. In this regard, this study aims to test solutions, at a preliminary level, for the eco-sustainable reuse of platforms at the end of their extraction phase. In particular, mineral accretion technology is applied by low-voltage electrolysis of seawater due to the precipitation of calcium carbonate on a cathode material in order to assess the protection capacity of the platforms against corrosion. This approach allows the extension of a platform’s “life” under a more sustainable purpose. The results, derived from laboratory and field experiments, will allow us to reduce uncertainties and define the best operating conditions to increase the efficiency of the mineral accretion technology in the marine ecosystem. The data collection on the main parameters that influence the process (i.e., temperature, salinity, and applied current) and the quantitative analysis of the collected material allowed us to acquire a better knowledge about mineral composition and deposition rate.

ACS Style

Lucia Margheritini; Giuseppina Colaleo; Pasquale Contestabile; Trine Larsen Bjørgård; Morten Enggrob Simonsen; Caterina Lanfredi; Antonio Dell’Anno; Diego Vicinanza. Development of an Eco-Sustainable Solution for the Second Life of Decommissioned Oil and Gas Platforms: The Mineral Accretion Technology. Sustainability 2020, 12, 3742 .

AMA Style

Lucia Margheritini, Giuseppina Colaleo, Pasquale Contestabile, Trine Larsen Bjørgård, Morten Enggrob Simonsen, Caterina Lanfredi, Antonio Dell’Anno, Diego Vicinanza. Development of an Eco-Sustainable Solution for the Second Life of Decommissioned Oil and Gas Platforms: The Mineral Accretion Technology. Sustainability. 2020; 12 (9):3742.

Chicago/Turabian Style

Lucia Margheritini; Giuseppina Colaleo; Pasquale Contestabile; Trine Larsen Bjørgård; Morten Enggrob Simonsen; Caterina Lanfredi; Antonio Dell’Anno; Diego Vicinanza. 2020. "Development of an Eco-Sustainable Solution for the Second Life of Decommissioned Oil and Gas Platforms: The Mineral Accretion Technology." Sustainability 12, no. 9: 3742.

Journal article
Published: 25 March 2020 in Applied Sciences
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The overtopping phenomenon at the rear side of breakwaters has particular importance in harbor protection. Undoubtedly, this topic needs to be taken even more seriously, considering the sea level rise. The present study focuses on the effectiveness in the reduction of the wave overtopping of a triangular parapet placed on the top of an innovative concrete superstructure. The last is part of the OBREC device (Overtopping BReakwater for wave Energy Conversion), an overtopping structure which is integrated into a traditional rubble-mound breakwater, to convert wave energy into electricity. Parametric laboratory tests, including the influence of water depth, have led to the evaluation of the accuracy of the main literature formulations and to the introduction of a new overtopping formula to take into account the influence of the parapet geometry. The results highlight the capability of the parapet in significantly increasing the hydraulic protection compared to a breakwater with a traditional crown wall. The findings from this work are expected to support in promoting and developing adaptive management strategies for existing coastal defenses and smart approaches in the construction and maintenance of new ones, with special reference to future sea-level-rise scenarios.

ACS Style

Pasquale Contestabile; Gaetano Crispino; Sara Russo; Corrado Gisonni; Furio Cascetta; Diego Vicinanza. Crown Wall Modifications as Response to Wave Overtopping under a Future Sea Level Scenario: An Experimental Parametric Study for an Innovative Composite Seawall. Applied Sciences 2020, 10, 2227 .

AMA Style

Pasquale Contestabile, Gaetano Crispino, Sara Russo, Corrado Gisonni, Furio Cascetta, Diego Vicinanza. Crown Wall Modifications as Response to Wave Overtopping under a Future Sea Level Scenario: An Experimental Parametric Study for an Innovative Composite Seawall. Applied Sciences. 2020; 10 (7):2227.

Chicago/Turabian Style

Pasquale Contestabile; Gaetano Crispino; Sara Russo; Corrado Gisonni; Furio Cascetta; Diego Vicinanza. 2020. "Crown Wall Modifications as Response to Wave Overtopping under a Future Sea Level Scenario: An Experimental Parametric Study for an Innovative Composite Seawall." Applied Sciences 10, no. 7: 2227.

Review
Published: 27 August 2019 in Renewable Energy
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The OBREC is an overtopping structure which is integrated into a traditional rubble-mound breakwater to convert wave energy into electricity. The relatively simple geometry of this overtopping device, with a single frontal ramp and a reservoir, makes the technology suitable to be fully combined also with existing structures. OBREC has been deeply investigated over the last years with physical and numerical model tests, and it is still under development with the ongoing monitoring activities at full-scale in real environments focusing on the wave-OBREC interaction. A comprehensive review of the research studies during the last ten years is here presented. The paper contains some unpublished details on OBREC geometry and power take-off strategy. A special attention is also directed to the description of the full-scale prototype of OBREC at Naples harbour, where an experimental campaign is still continuing.

ACS Style

Pasquale Contestabile; Gaetano Crispino; Enrico Di Lauro; Vincenzo Ferrante; Corrado Gisonni; Diego Vicinanza. Overtopping breakwater for wave Energy Conversion: Review of state of art, recent advancements and what lies ahead. Renewable Energy 2019, 147, 705 -718.

AMA Style

Pasquale Contestabile, Gaetano Crispino, Enrico Di Lauro, Vincenzo Ferrante, Corrado Gisonni, Diego Vicinanza. Overtopping breakwater for wave Energy Conversion: Review of state of art, recent advancements and what lies ahead. Renewable Energy. 2019; 147 ():705-718.

Chicago/Turabian Style

Pasquale Contestabile; Gaetano Crispino; Enrico Di Lauro; Vincenzo Ferrante; Corrado Gisonni; Diego Vicinanza. 2019. "Overtopping breakwater for wave Energy Conversion: Review of state of art, recent advancements and what lies ahead." Renewable Energy 147, no. : 705-718.

Journal article
Published: 23 July 2019 in Coastal Engineering
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The traditional function of coastal structures is the protection of the land from the sea. Such a function has been often carried out by breakwaters which dissipate part of the incident wave energy. Recently, the ongoing climate changes and their related issues have moved the attention toward new kinds of coastal structures which can protect the land and human activities and at the same time harvest part of the available wave energy. Such an energy source is alternative to non renewable ones like oil and gas, it is covered by the incentives of the renewable energy sector and it is subjected to an increasing interest of the international community. In such a framework, the present challenge of the coastal engineering is to design hybrid Wave Energy Coverters (WECs) which are: (i) effective in protecting the land, (ii) efficient in extracting wave energy, (iii) economically competitive with the conventional structures, (iv) structurally reliable. In comparison to other WECs, the Oscillating Water Column (OWC) breakwaters are considered among the most promising, therefore it is needed to investigate their design characteristics appropriately. Indeed, the durability of hybrid OWC breakwaters is strongly related to their response to wave action. In particular, the most critical point is the front lip, which is subjected to external wave impact and internal pressures within the chamber, at the same time. The complexity of wave-OWC interactions is studied here by means of a large scale physical model, which has been tested under regular wave conditions. The Power Take Off (PTO) characteristics are replaced here by a circular orifice, whose section has been varied. Such variations of the orifice section cause different types of response of the air inside the pneumatic chamber to external wave forcing. The response of the device under regular waves has been monitored by means of wave gauges and pressure sensors located both at the OWC and along the flume. First, the time evolution of the air pressure signal is analyzed. This is strongly affected by the air compressibility which is the key parameter in this analysis, since it controls the air-water interaction and it influences the whole OWC dynamics. The spectral analyses of the signals of pressure and free surface elevation provide insights on the relationship between water column oscillations and pressures inside and outside the chamber, in terms of both amplitudes and phase lags. It is found that the relation between inner and outer pressures is shown to be related to the resonance coefficient, which is a function of the lag between the flow across the OWC and the forcing outer pressure.

ACS Style

Antonino Viviano; Rosaria Ester Musumeci; Diego Vicinanza; Enrico Foti. Pressures induced by regular waves on a large scale OWC. Coastal Engineering 2019, 152, 103528 .

AMA Style

Antonino Viviano, Rosaria Ester Musumeci, Diego Vicinanza, Enrico Foti. Pressures induced by regular waves on a large scale OWC. Coastal Engineering. 2019; 152 ():103528.

Chicago/Turabian Style

Antonino Viviano; Rosaria Ester Musumeci; Diego Vicinanza; Enrico Foti. 2019. "Pressures induced by regular waves on a large scale OWC." Coastal Engineering 152, no. : 103528.

Journal article
Published: 07 February 2019 in Journal of Marine Science and Engineering
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OBREC is the acronym that stands for Overtopping Breakwater for Energy Conversion. It is a multifunctional device aimed to produce energy from the waves, while keeping the harbour area protected from flooding. In this paper, the inclusions of a berm to reduce wave reflection, the shape of the sloping plate to maximise wave overtopping and the reservoir width and the crown wall shape to maximise wave energy capture while keeping the harbour safety were analysed to optimize the hydraulic and structural performances of the device. Several configurations were numerically investigated by means of a 2DV RANS-VOF code to extend the results already obtained during previous experimental campaigns. The wave reflection coefficient, the average wave overtopping flows and the wave loadings along the structure are computed, compared with existing formulae and discussed with reference to the OBREC prototype installed in the Port of Naples.

ACS Style

Giuseppina Palma; Sara Mizar Formentin; Barbara Zanuttigh; Pasquale Contestabile; Diego Vicinanza. Numerical Simulations of the Hydraulic Performance of a Breakwater-Integrated Overtopping Wave Energy Converter. Journal of Marine Science and Engineering 2019, 7, 38 .

AMA Style

Giuseppina Palma, Sara Mizar Formentin, Barbara Zanuttigh, Pasquale Contestabile, Diego Vicinanza. Numerical Simulations of the Hydraulic Performance of a Breakwater-Integrated Overtopping Wave Energy Converter. Journal of Marine Science and Engineering. 2019; 7 (2):38.

Chicago/Turabian Style

Giuseppina Palma; Sara Mizar Formentin; Barbara Zanuttigh; Pasquale Contestabile; Diego Vicinanza. 2019. "Numerical Simulations of the Hydraulic Performance of a Breakwater-Integrated Overtopping Wave Energy Converter." Journal of Marine Science and Engineering 7, no. 2: 38.

Journal article
Published: 24 December 2018 in Coastal Engineering
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This paper presents the stability analysis of a non-conventional breakwater cross-section integrating an overtopping wave energy converter, named OBREC. The device consists of a traditional rubble-mound breakwater in which the upper part of the armour layer is replaced by a smooth ramp and a reservoir. The analysis of the structure is carried out by combining model scale experiments and numerical simulations based on the Volume-Averaged Reynolds Averaged Navier-Stokes (VARANS) equations. The numerical analysis is used to complete and extend the results of the physical model test campaign, providing a deeper understanding of the pressure distribution and resultant force behaviour in locations where laboratory measurements were difficult to obtain or not available. Results show that the maximum vertical and horizontal total forces on the device are not simultaneous. At the time instant of the maximum total horizontal force, the vertical force is zero or directed downward, due to the significant positive contribution of the force acting on the sloping ramp. Additional numerical simulations show the influence of the submerged ramp length on the forces acting on the structure using the global and local stability analysis. The presence of the shaft contributes positively to the global stability against the sliding failure mode by reducing the uplift force exerted on the horizontal base. Moreover, the stability analysis shows that the critical conditions for the global failure modes occur at different time instants.

ACS Style

Enrico Di Lauro; Javier L. Lara; Maria Maza; Inigo J. Losada; Pasquale Contestabile; Diego Vicinanza. Stability analysis of a non-conventional breakwater for wave energy conversion. Coastal Engineering 2018, 145, 36 -52.

AMA Style

Enrico Di Lauro, Javier L. Lara, Maria Maza, Inigo J. Losada, Pasquale Contestabile, Diego Vicinanza. Stability analysis of a non-conventional breakwater for wave energy conversion. Coastal Engineering. 2018; 145 ():36-52.

Chicago/Turabian Style

Enrico Di Lauro; Javier L. Lara; Maria Maza; Inigo J. Losada; Pasquale Contestabile; Diego Vicinanza. 2018. "Stability analysis of a non-conventional breakwater for wave energy conversion." Coastal Engineering 145, no. : 36-52.

Journal article
Published: 20 December 2018 in Coastal Engineering
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Wave energy is one of the most promising marine energy resources in terms of the scale of the resource, but there remains little technology convergence and costs remain at near-prohibitive levels. Of many wave energy converter (WEC) concepts that have been developed over the years, the oscillating water column (OWC) stands out for its simplicity and low maintenance cost. Quite some experience of actual OWC operation has been gained to date from small, stand-alone pilot schemes. One way to reduce costs is the integration of an OWC-WEC into a breakwater, enabling some degree of cost-sharing between energy and harbour or coastal defence functions. A major problem encountered during the design of an OWC-WEC scheme remains the uncertainty in the wave loads, with their critical influence upon capital cost. A model to estimate forces acting on an OWC chamber in a caisson breakwater is proposed in this paper. Horizontal forces on the front (curtain) wall and the rear (in-chamber) wall are predicted. In addition, and unlike a conventional caisson breakwater, vertical forces acting on the caisson chamber ceiling will have considerable effect on sliding and overturning characteristics of the breakwater structure. The proposed model enables the prediction of chamber pressures which in turn influence the chamber vertical force. The new model has been compared with results from large scale physical model measurements from tests carried out in the very large wave channel, GWK, in Hannover (Germany). Forces under both regular and irregular wave conditions were measured. The comparisons show that the model fits well with the test results to the factor of 1 ± 0.2 for the regular wave cases and to the factor of 0.8 ± 0.2 for irregular wave cases. This model will enable the structural design of caisson breakwater-integrated OWCs to be approached with uncertainties reduced to those comparable with conventional caisson design.

ACS Style

Krisna A. Pawitan; Aggelos S. Dimakopoulos; Diego Vicinanza; William Allsop; Tom Bruce. A loading model for an OWC caisson based upon large-scale measurements. Coastal Engineering 2018, 145, 1 -20.

AMA Style

Krisna A. Pawitan, Aggelos S. Dimakopoulos, Diego Vicinanza, William Allsop, Tom Bruce. A loading model for an OWC caisson based upon large-scale measurements. Coastal Engineering. 2018; 145 ():1-20.

Chicago/Turabian Style

Krisna A. Pawitan; Aggelos S. Dimakopoulos; Diego Vicinanza; William Allsop; Tom Bruce. 2018. "A loading model for an OWC caisson based upon large-scale measurements." Coastal Engineering 145, no. : 1-20.

Journal article
Published: 01 November 2018 in Renewable Energy
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This paper summarises the experience gained from wave basin experiments aimed at investigating the dynamic response of a spar buoy offshore wind turbine, under different wind and wave conditions. The tests were performed at the Danish Hydraulic Institute within the framework of the EU-Hydralab IV Integrated Infrastructure Initiative. The Froude-scaled model was subjected to regular and irregular waves, and to steady wind loads. Measurements were taken of hydrodynamics, displacements of the floating structure, wave induced forces at critical sections of the structure and at the mooring lines. First, free vibration tests were performed to obtain natural periods and damping ratios. Then, displacements, rotations, accelerations, and forces were measured under regular and irregular waves and three different wind conditions corresponding to cut-in, rated speed and cut-out. RAO, Statistical and spectral analyses were carried out to investigate the dynamic behaviour of the spar buoy wind turbine. The results show that most of the dynamic response occurs at the wave frequency, with minor contributions at the first and second harmonics of this, and at the natural rigid-body frequencies. In addition, in many cases a non-negligible contribution was found at the first bending frequency of the structure; this suggests that Cauchy scaling of the model cannot be neglected. According to the EU-Hydralab IV programme ‘Rules and conditions’ (www.hydralab.eu), the raw data are public domain, and therefore they represent a unique dataset of measurements, possibly useful for further analyses, for calibration and validation of numerical models, and for comparison with full scale observations.

ACS Style

Giuseppe Roberto Tomasicchio; Felice D'Alessandro; Alberto Maria Avossa; Luigia Riefolo; Elena Musci; Francesco Ricciardelli; Diego Vicinanza. Experimental modelling of the dynamic behaviour of a spar buoy wind turbine. Renewable Energy 2018, 127, 412 -432.

AMA Style

Giuseppe Roberto Tomasicchio, Felice D'Alessandro, Alberto Maria Avossa, Luigia Riefolo, Elena Musci, Francesco Ricciardelli, Diego Vicinanza. Experimental modelling of the dynamic behaviour of a spar buoy wind turbine. Renewable Energy. 2018; 127 ():412-432.

Chicago/Turabian Style

Giuseppe Roberto Tomasicchio; Felice D'Alessandro; Alberto Maria Avossa; Luigia Riefolo; Elena Musci; Francesco Ricciardelli; Diego Vicinanza. 2018. "Experimental modelling of the dynamic behaviour of a spar buoy wind turbine." Renewable Energy 127, no. : 412-432.

Journal article
Published: 06 June 2018 in Journal of Marine Science and Engineering
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This paper describes a set of spectral and eigen analysis in order to identify seiche generation from a large-scale laboratory dataset. The experiments were performed in the large-scale “Canal d’Investigació i Experimentació Marítima” wave flume at the Universitat Politècnica de Catalunya in Spain. Erosive and accretive wave regimes have been analyzed, including monochromatic waves and bichromatic wave groups with different bandwidths. Each test started with approximately the same underlying beach conditions. Video runup measurements are also used to better understand the role of the bandwidth in the generation of swash oscillation. Some evidence of the influence of low frequency waves on runup and sediment transport pattern is found. Good agreements between eigenmode families for volume flux and sediment volume variations are also shown.

ACS Style

Luigia Riefolo; Pasquale Contestabile; Diego Vicinanza. Seiching Induced by Bichromatic and Monochromatic Wave Conditions: Experimental and Numerical Analysis in a Large Wave Flume. Journal of Marine Science and Engineering 2018, 6, 68 .

AMA Style

Luigia Riefolo, Pasquale Contestabile, Diego Vicinanza. Seiching Induced by Bichromatic and Monochromatic Wave Conditions: Experimental and Numerical Analysis in a Large Wave Flume. Journal of Marine Science and Engineering. 2018; 6 (2):68.

Chicago/Turabian Style

Luigia Riefolo; Pasquale Contestabile; Diego Vicinanza. 2018. "Seiching Induced by Bichromatic and Monochromatic Wave Conditions: Experimental and Numerical Analysis in a Large Wave Flume." Journal of Marine Science and Engineering 6, no. 2: 68.

Journal article
Published: 01 June 2018 in Journal of Marine Science and Engineering
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In arid, coastal cities, water demand is often met through large-scale desalination systems. However, the energy required to run desalination plants remains a drawback. Further, numerous low-density population areas lack not only fresh water availability, but in most of the cases electrical grid connection or any other energy source as well. The challenge, consequently, is to ensure adequate fresh water supplies at the lowest possible cost. The main objective of this work is to assess the freshwater production from a reverse osmosis desalination system powered by a wave energy converter, the Overtopping Breakwater for Wave Energy Conversion (OBREC). The desktop analysis is illustrated through a case study on the Fenoarivo Atsinanana coast, along north-eastern Madagascar. The novel aspect of the analysis method is the application of a specific numerical code calibrated using preliminary results from a two-year monitoring campaign of the first OBREC prototype in operation in Naples Harbour (Italy). Instead of dissipating the incoming wave energy, the system collects the overtopping water above the sea level and the potential energy is converted into electricity through low head turbines. Then, the flow will be driven towards the desalination system. This configuration seems like a promising opportunity for developing countries to meet their water supply needs while at the same time developing their renewable energy potential.

ACS Style

Pasquale Contestabile; Diego Vicinanza. Coastal Defence Integrating Wave-Energy-Based Desalination: A Case Study in Madagascar. Journal of Marine Science and Engineering 2018, 6, 64 .

AMA Style

Pasquale Contestabile, Diego Vicinanza. Coastal Defence Integrating Wave-Energy-Based Desalination: A Case Study in Madagascar. Journal of Marine Science and Engineering. 2018; 6 (2):64.

Chicago/Turabian Style

Pasquale Contestabile; Diego Vicinanza. 2018. "Coastal Defence Integrating Wave-Energy-Based Desalination: A Case Study in Madagascar." Journal of Marine Science and Engineering 6, no. 2: 64.

Journal article
Published: 27 August 2017 in Sustainability
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The spread of the wind energy industry has caused the construction of wind farms in areas prone to high seismic activity. Accordingly, the analysis of wind turbine loading associated with earthquakes is of crucial importance for an accurate assessment of their structural safety. Within this topic, this paper presents some preliminary results of a probabilistic framework intended to be used for the estimation of the probability of failure of Horizontal Axis Wind Turbine-supporting structures when subjected to the wind and seismic actions. In particular, the multi-hazard fragility curves of the wind turbine-supporting structure were calculated using Monte Carlo simulations. A decoupling approach consisting of aerodynamic analysis of the rigid rotor blade model and subsequent linear dynamic Finite Element analyses of the supporting structure, including aerodynamic damping, was used. The failure condition of the tower structure was estimated according to the stress design procedure proposed by EC3 for the buckling limit state assessment. Finally, the vulnerability assessment of HAWTs to wind and seismic actions was evaluated in terms of fragility curves describing the probability of failure of the supporting tower structure as a function of the Peak Ground Acceleration (PGA) for each parked and operational wind condition. In particular, the results highlight a probability of failure larger than 50% for high levels of seismic action (PGA greater than 0.7 g) combined with the rotor in parked condition (wind speed of 3 m/s) or in operational rated condition (wind speed of 11.4 m/s).

ACS Style

Alberto Maria Avossa; Cristoforo Demartino; Pasquale Contestabile; Francesco Ricciardelli; Diego Vicinanza. Some Results on the Vulnerability Assessment of HAWTs Subjected to Wind and Seismic Actions. Sustainability 2017, 9, 1525 .

AMA Style

Alberto Maria Avossa, Cristoforo Demartino, Pasquale Contestabile, Francesco Ricciardelli, Diego Vicinanza. Some Results on the Vulnerability Assessment of HAWTs Subjected to Wind and Seismic Actions. Sustainability. 2017; 9 (9):1525.

Chicago/Turabian Style

Alberto Maria Avossa; Cristoforo Demartino; Pasquale Contestabile; Francesco Ricciardelli; Diego Vicinanza. 2017. "Some Results on the Vulnerability Assessment of HAWTs Subjected to Wind and Seismic Actions." Sustainability 9, no. 9: 1525.