Nylon fibre rope moorings for wave energy converters

Ridge, I.M.L.; Banfield, S.J.; MacKay, James

doi:10.1109/oceans.2010.5663836

Cited by 41 publications

(51 citation statements)

References 5 publications

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“…Marine renewable energy (MRE) devices are a new eld of application requiring the development of robust and economical mooring systems. It is likely that the synthetic materials currently used for existing o shore equipment will feature in the mooring systems of MRE devices [18] and recommendations have been produced to pre-empt the shift from conventional technologies (e.g. The Carbon Trust/DNV [19]).…”

Section: Introductionmentioning

confidence: 99%

“…As part of a dedicated component testing program involving the collaboration of L'Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) and the University of Exeter, as part of a MERiFIC (Marine Energy in Far Peripheral and Island Communities) consortium, the axial sti ness and the damping of several parallel-stranded nylon 6 rope samples are quanti ed in the context of the operational mooring loads that could be experienced by MRE devices. nylon has been selected due to its compliant properties which may be utilised to reduce peak mooring loads [18]. In this study, harmonic and irregular loading regimes are used to determine the average performance of new rope samples with investigations made on the inuence of load history on time-averaged and time-varying performance.…”

Section: Introductionmentioning

confidence: 99%

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Synthetic rope responses in the context of load history: Operational performance

et al. 2014

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The utilisation of synthetic mooring ropes for marine renewable energy (MRE) devices is a recent occurrence. Despite current use in the o shore industry, MRE mooring components are typically subjected to highly dynamic loads, necessitating the detailed characterisation of operational and long-term component performance for lifecycle analysis and operations management. To address the uncertainties associated with synthetic mooring components in this application, tension experiments have been conducted on nylon 6 parallel-stranded rope samples at IFREMER, France and the University of Exeter, UK under the consortium MERiFIC (Marine Energy in Far Peripheral and Island Communities). Measurements are reported from harmonic loading tests with di erent initial bedding-in levels used to investigate the in uence of load history on the immediate dynamic properties of the rope. Two irregular load regimes were also applied based on mooring tensions recorded by the South West Mooring Test Facility (SWMTF). Datasets are provided to facilitate the development of rope modelling tools. For the load regimes studied it was found that the operational performance of the rope is strongly in uenced by the instantaneous load-strain characteristic. This study provides unique insight into the sti ness and damping properties of synthetic rope in the context of loading regimes relevant to MRE devices.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthetic rope responses in the context of load history: Operational performance

et al. 2014

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“…Other studied like, e.g., Ref. [21,22] similarly identified synthetic ropes as an appealing solution. The following study [13] produced a large database of experimental data, used it to validate the initially-considered quasi-static design approach, and it identified a clear underestimation of mooring loads in extreme seas.…”

Section: Introductionmentioning

confidence: 95%

Cost Optimization of Mooring Solutions for Large Floating Wave Energy Converters

et al. 2018

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Abstract:The increasing desire for using renewable energy sources throughout the world has resulted in a considerable amount of research into and development of concepts for wave energy converters. By now, many different concepts exist, but still, the wave energy sector is not at a stage that is considered commercial yet, primarily due to the relatively high cost of energy. A considerable amount of the wave energy converters are floating structures, which consequently need mooring systems in order to ensure station keeping. Despite being a well-known concept, mooring in wave energy application has proven to be expensive and has a high rate of failure. Therefore, there is a need for further improvement, investigation into new concepts and sophistication of design procedures. This study uses four Danish wave energy converters, all considered as large floating structures, to investigate a methodology in order to find an inexpensive and reliable mooring solution for each device. The study uses a surrogate-based optimization routine in order to find a feasible solution in only a limited number of evaluations and a constructed cost database for determination of the mooring cost. Based on the outcome, the mooring parameters influencing the cost are identified and the optimum solution determined.

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“…Positioning classification include Shoreline devices, Near to shore devices and offshore devices. Under the shoreline devices, the devices are being placed on sea water in shallow, integrated in breakwater-like structures or coupled to a rocky cliff [7] With Near to shore devices, the devices are being deployed in approximately 10-20 metres of sea water depth, hundreds of meters measured from shore [8]. Under offshore devices, the floating devices are being places in deep water and are being moored to the floor of the sea and these devices represent the most promising class of wave energy converters.…”

Section: Classifications Of Wave Energy Convertermentioning

confidence: 99%

Structural Design and Hydrodynamics Analysis of Wave Energy Converter for Falculty of Engineering, Rmu

Owusu-Nyarko¹

2017

JEEE

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Due to the continuous fluctuation of the prices of oil and the environmental impact on the economy, a renewable energy becomes debatable issue. The generation of electricity by harnessing the power of sea wave has been the most prominent research into renewable energy for over decades. Various researches have used various power take off mechanisms systems for converting wave power into electrical power such as the pelamis, oscillating water column, Archimedes wave swing etc. In this research, linear generator power take of method is used to convert the motion of wave at its interaction with the devices into electricity since this method offers a great power output at a minimum wave energy power than other methods. Feasibility studies to ascertain the exact location for mooring of the components were conducted using google search. The analysis of a hybrid quantitative and qualitative method is applied. In this aspect, statistical analysis of sea wave data and the consumption of electrical gadget of the faculty engineering of Regional Maritime University were analysed in order to design a suitable wave energy converter. Hydrodynamic analysis of wave energy converter was determined in order to establish the velocity of sea wave, for due to the incident wave, the energy from sea wave and the electrical power generated by the generator as a result of sea wave energy.

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Nylon fibre rope moorings for wave energy converters

Cited by 41 publications

References 5 publications

Synthetic rope responses in the context of load history: Operational performance

Synthetic rope responses in the context of load history: Operational performance

Cost Optimization of Mooring Solutions for Large Floating Wave Energy Converters

Structural Design and Hydrodynamics Analysis of Wave Energy Converter for Falculty of Engineering, Rmu

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