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This paper provides an in-depth analysis of the erosion at Nørlev Strand located on the Danish west coast. This location suffers from severe erosion; the result of a combined chronic, acute and, at least partially, man-induced erosion. The analysis is done by studying the average climatic conditions in the vicinity, and the effects of storms. Analysis shows an increase in the measured moderate to large wave events and consequent connection of the erosion problem to climate change. Other effects of climate change such as increase in rainfall were also considered and a surprisingly good correlation was found between coastal erosion in Nørlev and national storm records. Furthermore, a shift in mean wave direction has also been noted in the case of waves coming from the north. The significance that these changes can have in the sediment is assessed quantitatively through numerical modelling.
Ofelia Yocasta Rivero; Lucia Margheritini; Peter Frigaard. Accumulated effects of chronic, acute and man-induced erosion in Nørlev strand on the Danish west coast. Journal of Coastal Conservation 2021, 25, 1 -15.
AMA StyleOfelia Yocasta Rivero, Lucia Margheritini, Peter Frigaard. Accumulated effects of chronic, acute and man-induced erosion in Nørlev strand on the Danish west coast. Journal of Coastal Conservation. 2021; 25 (1):1-15.
Chicago/Turabian StyleOfelia Yocasta Rivero; Lucia Margheritini; Peter Frigaard. 2021. "Accumulated effects of chronic, acute and man-induced erosion in Nørlev strand on the Danish west coast." Journal of Coastal Conservation 25, no. 1: 1-15.
Hicham Johra; Lucia Margheritini; Yovko Ivanov Antonov; Kirstine Meyer Frandsen; Morten Enggrob Simonsen; Per Møldrup; Rasmus Lund Jensen. Thermal, moisture and mechanical properties of Seacrete: A sustainable sea-grown building material. Construction and Building Materials 2020, 266, 1 .
AMA StyleHicham Johra, Lucia Margheritini, Yovko Ivanov Antonov, Kirstine Meyer Frandsen, Morten Enggrob Simonsen, Per Møldrup, Rasmus Lund Jensen. Thermal, moisture and mechanical properties of Seacrete: A sustainable sea-grown building material. Construction and Building Materials. 2020; 266 ():1.
Chicago/Turabian StyleHicham Johra; Lucia Margheritini; Yovko Ivanov Antonov; Kirstine Meyer Frandsen; Morten Enggrob Simonsen; Per Møldrup; Rasmus Lund Jensen. 2020. "Thermal, moisture and mechanical properties of Seacrete: A sustainable sea-grown building material." Construction and Building Materials 266, no. : 1.
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.
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 StyleLucia 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 StyleLucia 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.
This paper presents the details of a study performed to investigate the feasibility of a wave energy system made up of a number of Weptos wave energy converters (WECs) and sets of batteries, to provide the full energy demands of a small island in Denmark. Two different configurations with 2 and 4 Weptos machines respectively with a combined installed power of 750 kW (and a capacity factor of 0.2) are presented. One full year simulation, based a detailed hourly analysis of the power consumption and wave energy resource assessment in the surrounding sea, is used to demonstrate that both configurations, supplemented by a 3 MWh battery bank and a backup generator, can provide the energy needs of the island. The proposed configurations are selected on the basis of a forecast optimization of price estimates for the individual elements of the solutions. The simulations show that Weptos WECs actually deliver 50% more than average consumption over the year, but due to the imbalance between consumption and production, this is not enough to cover all situations, which necessitates a backup generator that must cover 5–7% of consumption, in situations where there are too few waves and the battery bank is empty.
Lucia Margheritini; Jens Peter Kofoed. Weptos Wave Energy Converters to Cover the Energy Needs of a Small Island. Energies 2019, 12, 423 .
AMA StyleLucia Margheritini, Jens Peter Kofoed. Weptos Wave Energy Converters to Cover the Energy Needs of a Small Island. Energies. 2019; 12 (3):423.
Chicago/Turabian StyleLucia Margheritini; Jens Peter Kofoed. 2019. "Weptos Wave Energy Converters to Cover the Energy Needs of a Small Island." Energies 12, no. 3: 423.
A general and widely applicable methodology to assess and present the performance of wave energy converters (WEC) based on sea trials is presented. It is meant to encourage WEC developers to present the performance of their WEC prototypes, on a transparent and equitable way while taking care of possible discrepancy in the observed performance of the WEC. Due to the harsh uncontrollable conditions of the sea that is encountered by WECs during sea trials, some of the performance of the WECs might be sub optimal and the data sets not fully complete. The methodology enables to filter the data by applying a selection criterion on the performance data that was obtained for a certain range of wave conditions. This selection criteria result in a subset of performance data representing the performance of the WEC for specific wave conditions, from which an average value an appreciation of the related uncertainty can be derived. This can lead to the estimation of the annual energy output of the WEC at its test location, while it also provides a method to estimate its annual energy output for another location of interest and possibly also at another scaling ratio. The same methodology can also be used to perform parametric studies with environmental or device dependent parameters and to analyse the power conversion chain from wave to wire, which both could lead to an enhanced understanding of the performance and behaviour of the WEC. The same methodology is also applicable to tidal devices or any other developing technologies that are used in an uncontrollable environment.
Jens Peter Kofoed; A. Pêcher; L. Margheritini; M. Antonishen; C. Bittencourt; B. Holmes; C. Retzler; K. Berthelsen; I. Le Crom; F. Neumann; C. Johnstone; T. McCombes; L.E. Myers. A methodology for equitable performance assessment and presentation of wave energy converters based on sea trials. Renewable Energy 2012, 52, 99 -110.
AMA StyleJens Peter Kofoed, A. Pêcher, L. Margheritini, M. Antonishen, C. Bittencourt, B. Holmes, C. Retzler, K. Berthelsen, I. Le Crom, F. Neumann, C. Johnstone, T. McCombes, L.E. Myers. A methodology for equitable performance assessment and presentation of wave energy converters based on sea trials. Renewable Energy. 2012; 52 ():99-110.
Chicago/Turabian StyleJens Peter Kofoed; A. Pêcher; L. Margheritini; M. Antonishen; C. Bittencourt; B. Holmes; C. Retzler; K. Berthelsen; I. Le Crom; F. Neumann; C. Johnstone; T. McCombes; L.E. Myers. 2012. "A methodology for equitable performance assessment and presentation of wave energy converters based on sea trials." Renewable Energy 52, no. : 99-110.
During the first decade of the 21st Century the World faces spread concern for global warming caused by rise of green house gasses produced mainly by combustion of fossil fuels. Under this latest spin all renewable energies run parallel in order to achieve sustainable development. Among them wave energy has an unequivocal potential and technology is ready to enter the market and contribute to the renewable energy sector. Yet, frameworks and regulations for wave energy development are not fully ready, experiencing a setback caused by lack of understanding of the interaction of the technologies and marine environment, lack of coordination from the competent Authorities regulating device deployment and conflicts of maritime areas utilization. The EIA within the consent process is central in the realization of full scale devices and often is the meeting point for technology, politics and public. This paper presents the development of a classification of wave energy converters that is based on the different impact the technologies are expected to have on the environment. This innovative classification can be used in order to simplify the scoping process for developers and authorities.
Lucia Margheritini; Anne Merrild Hansen; Peter Frigaard. A method for EIA scoping of wave energy converters—based on classification of the used technology. Environmental Impact Assessment Review 2012, 32, 33 -44.
AMA StyleLucia Margheritini, Anne Merrild Hansen, Peter Frigaard. A method for EIA scoping of wave energy converters—based on classification of the used technology. Environmental Impact Assessment Review. 2012; 32 (1):33-44.
Chicago/Turabian StyleLucia Margheritini; Anne Merrild Hansen; Peter Frigaard. 2012. "A method for EIA scoping of wave energy converters—based on classification of the used technology." Environmental Impact Assessment Review 32, no. 1: 33-44.
The Sea-wave Slot-cone Generator (SSG) is a Wave Energy Converter based on the wave overtopping principle; it employs several reservoirs placed on top of each other, in which the energy of incoming waves is stored as potential energy. Then, the captured water runs through turbines for electricity production. The system works under a wide spectrum of different wave conditions, giving a high overall efficiency. It can be suitable for shoreline and breakwater applications and presents particular advantages, such as sharing structure costs, availability of grid connection and recirculation of water inside the harbor, as the outlet of the turbines is on the rear part of the system. Recently, plans for the SSG pilot installations are in progress at the Svaaheia site (Norway), the port of Hanstholm (Denmark) and the port of Garibaldi (Oregon, USA). In the last-mentioned two projects, the Sea-wave Slot-cone Generator technology is integrated into the outer harbor breakwater and jetty reconstruction projects. In the last years extensive studies have been performed on the hydraulic and the structural response of this converter, with the aim of optimizing the design process. The investigations have been conducted by physical model tests and numerical simulations and many results have been published on both conference proceedings and journals. The main scope of this paper is reviewing the most significant findings, to provide the reader with an organic overview on the present status of knowledge.
Diego Vicinanza; Lucia Margheritini; Jens Peter Kofoed; Mariano Buccino. The SSG Wave Energy Converter: Performance, Status and Recent Developments. Energies 2012, 5, 193 -226.
AMA StyleDiego Vicinanza, Lucia Margheritini, Jens Peter Kofoed, Mariano Buccino. The SSG Wave Energy Converter: Performance, Status and Recent Developments. Energies. 2012; 5 (2):193-226.
Chicago/Turabian StyleDiego Vicinanza; Lucia Margheritini; Jens Peter Kofoed; Mariano Buccino. 2012. "The SSG Wave Energy Converter: Performance, Status and Recent Developments." Energies 5, no. 2: 193-226.
The SSG (Sea Slot-cone Generator) is a wave energy converter of the overtopping type. The structure consists of a number of reservoirs one on the top of each other above the mean water level in which the water of incoming waves is stored temporary. In each reservoir, expressively designed low head hydro-turbines are converting the potential energy of the stored water into power. A key to success for the SSG will be the low cost of the structure and its robustness. The construction of the pilot plant is scheduled and this paper aims to describe the concept of the SSG wave energy converter and the studies behind the process that leads to its construction. The pilot plant is an on-shore full-scale module in 3 levels with an expected power production of 320 MWh/y in the North Sea. Location, wave climate and laboratory tests' results will be used here to describe the pilot plant and its characteristics.
L. Margheritini; D. Vicinanza; P. Frigaard. SSG wave energy converter: Design, reliability and hydraulic performance of an innovative overtopping device. Renewable Energy 2009, 34, 1371 -1380.
AMA StyleL. Margheritini, D. Vicinanza, P. Frigaard. SSG wave energy converter: Design, reliability and hydraulic performance of an innovative overtopping device. Renewable Energy. 2009; 34 (5):1371-1380.
Chicago/Turabian StyleL. Margheritini; D. Vicinanza; P. Frigaard. 2009. "SSG wave energy converter: Design, reliability and hydraulic performance of an innovative overtopping device." Renewable Energy 34, no. 5: 1371-1380.