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- Conference Paper:
Jarquin-Laguna and Ordonez-Sanchez
Clean water provision is one of the greatest challenges for the human population of the 21st century. One way to overcome this problem is through the desalinisation of seawater using renewable energy solutions to minimise fossil fuel consumption. However, the cost of producing clean water with renewable energy technology is more expensive when compared to conventional technology. In this paper…
- Conference Paper:
Draycott et al.
—Wave buoys are used extensively for the characterisation of deployment locations for offshore technologies, where they are subjected to currents in addition to the ocean waves. It has been frequently observed that the measurements from wave buoys are affected by these currents, but the majority of deployed buoys cannot measure, or account for, this effect. Presented here are a series of…
- Conference Paper:
Chitale et al.
Ocean waves offer an uninterrupted, rich resource of globally available renewable energy. However, because of their high cost and low power production, commercial wave energy converters are not operational at present. In this paper, we numerically evaluated the performance of a novel feedback-controlled lift-based cycloidal wave energy converter (CycWEC) at various sea states of the Humboldt…
- Conference Paper:
Coles et al.
A newly developed cost model for tidal stream turbines is presented. The model is based on (a) an existing tidal stream turbine cost model, (b) published CapEx data from an operational tidal stream turbine array, and (c) wind turbine cost data. The new cost model is utilised to establish cost-effective tidal stream turbine design, with the aim of reducing cost of energy through appropriate…
- Conference Paper:
Calheiros-Cabral et al.
Harnessing and using marine renewable energy at seaports is a promising solution to put these energy intensive infrastructures on the right track to energy self-sufficiency and environmental sustainability, reducing their carbon footprint. This paper presents a summary of the main conclusions and achievements of a recently concluded R&D project that encompassed the experimental study of an…
- Conference Paper:
Joßberger et al.
Up to 6 Schottel Instream Turbines (SIT250) can be mounted on the tidal platform PLAT-I developed by Sustainable Marine Energy. Due to the close proximity of the turbines interactions can occur between them. Two horizontal axis tidal turbines in model scale are investigated experimentally and numerically to analyze these interactions. Experimental data were measured in a towing tank and…
- Conference Paper:
Sirigu et al.
Reliable and computationally fast numerical models play a decisive role in the development of robust design and optimization tools for wave energy converter. This study presents an approach to consider model nonlinearities via statistical linearization method and its implementation in the probabilistic model of the WEC. The ISWEC (Inertial Sea Wave Energy Converter) is chosen as the case study…
- Conference Paper:
Lloyd et al.
Three numerical models were developed to explore the effect of regular wave propagation at different angles to the current flow (0°, 45° and 67.5°), without the presence of a turbine. The flow conditions generated by each of the wave-current models were analysed and used to estimate the impact of these flow conditions on Tidal Stream Turbine loadings and performance. It was found that as the…
- Conference Paper:
Li et al.
Different from the traditional rigid body WECs, a flexible WEC consisting of flexible material is numerically modeled in this paper. A fully coupled fluid structure interaction solver that can cope with the dynamic interplay between the flexible membrane and the surrounding fluid is developed. The fluid field is resolved by computational fluid dynamics (CFD) method, where a multi-phase flow…
- Conference Paper:
Tosdevin et al.
Much attention has been paid in recent years to the determination of design loads for moored floating structures and the application of established methodologies for fixed structures have been found to be ineffective. This paper experimentally investigates extreme responses of a lazy S moored 1:20 scale model of Mocean Energy’s Blue Star wave energy convertor (WEC) along the 1 year return…
- Conference Paper:
Tournant et al.
We consider the numerical modelling of a quayside WEC (Wave Energy Converter) using OpenFOAM. The numerical model uses sliding interfaces with moving mesh and waveFoam’s method to generate and absorb wave reflection. Water overtoppings over the wall and RAO (Ratio Amplitude Response) results are investigated. The influence of clearence distance and the buoy draft is studied. The numerical…
- Conference Paper:
Zabala et al.
Boundary Element Method (BEM) solvers are extensively used to obtain the hydrodynamic coefficients required to model hydrodynamic forces in floating marine structures. BEM solvers require the discretization of the submerged device surface as a mesh to compute the hydrodynamic coefficients as radiation damping and added mass, response amplitude operators and linear and second-order exciting…
- Conference Paper:
Majumdar et al.
Increasing power demands and pollution in developing countries has given rise to a need for finding alternate sustainable energy sources. European and American countries have explored ocean energy for a quite long. Intense research activities have been carried out in these nations post 1990s. Spatial distribution of wave heights is irregular across the world. This local enhancement of wave…
- Conference Paper:
Fagley et al.
The Cycloidal Wave Energy Converter (CycWEC) is a device in which two hydrofoils rotate about a center shaft interacting with the water surface through the generation of circulatory forces. The CycWEC is a unique device as it classified as a single-sided, wave terminator by its ability to generate a single sided wave, but the device requires real-time estimation and control to efficiently…
- Conference Paper: Dillon et al.
An Open-Source Approach to Modelling Fluid-Structure Interaction of a Crossflow Hydrokinetic Turbine
With the continued upscaling of marine hydrokinetic (MHK) turbines, there is need for the development of more accurate fluid-structure interaction (FSI) capabilities to handle the increased deflections and stresses associated with larger turbines. This paper will present the results acquired from opensource software used to compare two FSI coupling strategies—one-way FSI and strongly coupled…
- Conference Paper:
Frost et al.
Tidal resource assessment for the characterisation of turbine performance or Annual Energy Prediction currently uses the method of bins as recommended by international standards. An alternative method is proposed in this paper and applied to the Sustainable Marine Energy PLAT-I deployment in Connel Sound, Scotland. This method may be suitable for tidal turbines which operate from the surface.…
- Conference Paper:
Joensen et al.
Here we investigate the performance of an experimentally tested model-scale oscillating water column (OWC) device, modified to only exploit half of the wave cycle. To do this we integrate a passive valve system into the OWC chamber which ensures a free connection to the atmosphere either on the up- or the down-stroke, but sends the flow through the orifice plate representing the full-scale air…
- Conference Paper:
David et al.
To generate a commercially viable amount of electricity, wave energy converters (WECs) need to be deployed in arrays or “wave farms”. However, when designing a wave farm, there is a trade-off between the power production potential and installation/operational costs, with the optimal design for one objective not necessarily favourable for the other. In this work, we examine two primary…
- Conference Paper: Brousseau et al.
Fluid-structure interaction effects on the dynamics of a moving deformable hydrofoil in a fluid flow
The paper focuses on the study of a semiactivated system, based on a combination of a two movements of forced pitching and free heaving motion. Therefore, quantifying with accuracy the hydrodynamic forces applied on the hydrofoil seems to be crucial. This is investigated throughout a numerical modeling of a 2D f lexible hydrofoil dynamics, immersed in a fluid flow with a Reynolds number of…
- Conference Paper:
Carapellese et al.
The purpose of this paper is to present two different optimisation approaches for a multi-objective problem applied to PeWEC (pendulum wave energy converter), which is a pitching platform converting energy from the oscillation of a pendulum contained in a sealed hull. Two techno-economic parameters the CapEx over Productivity ratio (CoP) and the Capture Width Ratio (CWR) have been adopted as…
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