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- Journal Article:
Harding and Bryden
… The directionality of the tidal flow throughout the tidal cycle has important implications for tidal energy capture … investigates the connection between directionality and the incident kinetic energy density of tidal currents in the Northern United Kingdom. It demonstrates a positive correlation between these flow parameters and quantifies this through the analysis of real tidal velocity data. … 10.1016/j.renene.2012.02.003 …
- Report:
Grattan and Jeffrey
… This report aims to forecast the potential deployment of wave and tidal stream energy devices in UK waters by 2050, outlining how the ocean energy sector can meaningfully contribute towards national Net Zero targets. The emergence of a commercial wave and tidal stream sector can also strengthen our future national energy mix, … important given the ongoing concerns over national energy security, the volatility of foreign energy imports and the need for clean and secure domestic sources of energy. This …
- Journal Article:
Gebreslassie et al.
… This paper investigates the accuracy of the Computational Fluid Dynamics (CFD) based Immersed Body Force (IBF) turbine modelling method for predicting the flow characteristics of a Momentum-Reversal-Lift type of tidal turbine. This empirically-based CFD model has been developed based on the actuator disc …
- Conference Paper:
Summers et al.
… Maintenance of tidal turbines is expensive, and relies upon suitable weather conditions and vessel … delays. Turbine reliability can be improved by eliminating complexity in the design. The use of fixed-pitch blades, for example, can greatly reduce maintenance costs by avoiding complex active blade-pitch mechanisms which are the main source of failure in wind turbines. Pitching rotor blades to feather in high-flow conditions is, …
- Journal Article:
Borg et al.
… Establishing a design and material evaluation of unique tidal turbine rotors in true hydrodynamic conditions by means of a numerical structural analysis has presented inadequacies in implementing spatial and … along the blade surfaces. This study puts forward a structural performance investigation of true-scale, ducted, high-solidity, fibre-composite tidal turbine rotor configurations in …
- Journal Article:
Borg et al.
… Analysing the fluid dynamic performance of a bare rotor when succumb to yawed flow conditions has consistently presented a diminishment … computational fluid dynamics. Investigating the performance within an angular bearing range of 0o to 45o with the turbine axis, increases in mechanical rotational power and thrust are … ratio values. Through the multiple yaw iterations, the maximum attainment falls at an angle of 23.2o, resulting in a power increase of 3.44% to a peak power coefficient of 0.35 at a nominal …
- Journal Article:
Borg et al.
… utilising blade-resolved computational fluid dynamics. The model achieves similarity values of over 0.96 with experimentation data regarding a three-bladed horizontal-axis tidal turbine in validation of three distinct parameters: power & torque coefficient, thrust coefficient, and wake velocity profiles. Accordingly, the model was employed for the analysis of a ducted, high-solidity turbine in axially-aligned flows at distinct free-stream velocities. …
- Journal Article:
Dimakopoulos et al.
… is considered and both the thermodynamic and potential flow equations are linearised. Analysis of the linearised system of equations reveals a nondimensional coefficient which we name “compression number”. The flow potential is decomposed into scattering and radiation components, using an analogue of spring-dashpot response and taking into account the additional effects of air compressibility …
- Journal Article:
Payne et al.
… (PTO) system reacts against water inertia is investigated herein. The main focus is the impact of inclining the PTO direction on the system performance. The study is based on a numerical model … coefficients are obtained using the linear boundary element method package WAMIT. Verification of the model is provided prior to its use for a PTO parametric study and a multi-objective … based on a multi-linear regression method. It is found that inclining the direction of the PTO at around 50° to the vertical is highly beneficial for the WEC performance in that it …
- Report:
Venugopal et al.
… This report examines the application of a number of numerical wave models to the process of quantifying the resource at a specific coastal site. The models are used to transform the deep …
- Book Chapter:
Jaksic et al.
… The structural design of marine tidal turbine blades is governed by the hydrodynamic shape of the aerofoil, extreme loadings and composite material mechanical properties. The design of the aerofoil, chord and twist distribution along the blade is generated to optimise turbine …
- Conference Paper:
Gambuzza et al.
… predictable energy sources that could prove fundamental to the transition to a sustainable use of renewable energy resources. Over a tidal period, changes in the flow speed in a tidal channel … loads has recently been formulated and demonstrated with low-order simulations (https://doi.org/10.1016/j.renene.2021.10.085) and measurements … turbine. Two different design concepts have been tested in the FloWave facility at the University of Edinburgh and in the recirculating channel at the Institute for Marine Engineering …
- Conference Paper:
Liu et al.
… where only a 120 ◦ wedge domain with a single blade is resolved in a non-inertial frame of reference. We undertake a detailed uncertainty analysis to identify the sources of error. BEM uncertainty is computed with a Monte-Carlo approach based on the differences in the predictions of CFD and Xfoil for the sectional lift and drag coefficients,while CFD uncertainty is based on …
- Conference Paper:
Ohana et al.
… One of the main goals of the EU H2020 MaRINET2 project is to improve the quality, robustness and … paper describes the tests on a wave energy converter model carried out in the wave tanks of University of Plymouth, University College Cork, University of Edinburgh and Centrale Nantes. This deep water device selected by the partners is a two-body …
- Journal Article:
Tunga et al.
… produce reliable, valuable energy at an acceptable cost. The key to increasing the deployment of ocean energy is bringing down development and operating costs. This paper proposes a … innovation and expand the market for ocean energy. This approach can be used by a wide range of stakeholders—including technology and project developers and investors—when considering … improving designs. The Structured Innovation design tool within the DTOceanPlus suite is one of a kind beyond the current state-of-the-art. It enables the adaptation and integration of …
- Journal Article:
Roberts et al.
… creation tool presented in this paper provides a structured method for the earliest stages of design in technology development. The core function of the scenario creation tool is to generate and rank scenarios of potential Wave Energy Converter (WEC) attributes and inform the user on the areas of the …
- Journal Article:
Pérez-Ortiz et al.
… is presented for Rathlin Sound, located between Rathlin Island and the north-east coast of Northern Ireland. The flow is simulated in 2D, using the shallow water equations. For an M2 tide, the natural flow conditions exhibit local spatial mean and maximum flow speeds of 2 and 3 m/s. Upper limits to power extraction are about 298 MW for M2 and 330 MW for M2+S2 … undisturbed kinetic power and power naturally dissipated at the seabed). An analytical model of a channel connecting two infinite ocean basins underpredicts maximum power extracted in …
- Journal Article:
Wimalaratna et al.
… The facts are that increasing energy demand, depletion of fossil fuel, and greenhouse gas emissions have increased the world's interest in renewable energy. Out of all RE options, Wave Energy (WE) is the least harnessed one despite the availability of WE Resource (WERs) in many countries and with the potential to cover a significant proportion …
- Journal Article:
Pérez-Ortiz et al.
… rapid development, the global aim being to achieve energy security and lower carbon emissions. Of marine renewable energy sources, tidal power has inherent predictability and large theoretical … estimated to exceed 8000 (TW h)a −1 in coastal basins. Coastal sites in the vicinity of an island near a landmass are prime candidates for tidal stream power exploitation by arrays of turbines. This paper characterizes numerically the upper limit to power extraction of turbines …
- Journal Article:
Rahman et al.
… To date, only a few studies have examined the execution of the actuator disc approximation for a full-size turbine. Small-scale models have fewer constraints than large-scale models because the range of time-scale and length-scale is narrower. Hence, this article presents the methodology in … rotor diameter and width was used at the turbine location to allow for better representation of the disc. The model was tuned to match known coefficient of thrust and operational profiles …
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