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- Gambuzza et al.
… and non uniform, resulting in undesirable load fluctuations on the blades and the drive train of turbines. A passive morphing blade concept capable to reduce the load fluctuations without … simulations (Pisetta et al., 2022). In this paper, we present the first demonstration of this morphing blade concept, through experimental tests on a 1.2-m diameter turbine. We show … in the root-bending moment, thrust and torque are consistently reduced over a broad range of tip-speed ratios. This work also highlights some critical design aspects of morphing blades. …
- Tay and Venugopal
… The oscillating wave surge converter (OWSC) is a type of ocean wave power device typically consisting of a flap, or arm, hinged at the bottom to allow forward and backward movement by surging waves, … in generating electricity from waves due to its capability in operating at a wide range of wave spectra. The power generated from the OWSC could be further maximized by arranging the …
- Mueller and Jeffrey
… the wave and tidal energy community in the UK down a deployment pathway towards a target of achieving 2GW installed capacity by 2020. The roadmap is aimed at providing a focused and … approach to technology development in the marine sector, whilst taking into account the needs of other stakeholders. The successful implementation of the technology roadmap depends upon a number of complex interactions between commercial, …
- Lavidas and Venugopal
… coastal assessment for the Libyan Sea at the South-West Mediterranean. To date majority of information for the area, are based on large scale oceanic models with coarse resolutions not … and analysis provides an in-depth wave energy resource assessment and detail dissemination of sites according to their metocean characteristics. Identification for wave energy is based on the database constructed, allowing the quantification of energy levels and resource implications at sites. Mean values of wave heights around the …
- Sousounis et al.
… where the wave energy resource is the highest; using large devices to generate hundreds of kilowatts of power. However, it is possible to generate power from low power waves using smaller wave … coastal or island communities which are off-grid. This study introduces wave-to-wire modelling of wave energy arrays for off-grid systems using low power permanent-magnet linear generators …
- Child and Venugopal
… In this paper we seek configurations of wave energy devices that help to achieve certain objectives, such as maximising power for a … employ an exact hydrodynamic interaction technique, which is used to assess the performance of the resulting arrays. The power enhancing effect of the arrangement ( ¯q-factor) is presented for regular incident waves with a range of …
- Borthwick
… current, tidal range, wave, thermal, salinity gradients, and biomass sources. Future areas of research and development are outlined that could make exploitation of the marine renewable energy (MRE) seascape a viable proposition; these areas include energy … governance and consenting, economic, social, and environmental constraints. A new generation of engineers is needed with the ingenuity and spirit of adventure to meet the global challenge …
- Cruz and Salter
… This paper presents recent numerical studies conducted at The University of Edinburgh related to a modified version of the Edinburgh duck wave energy converter. Its purpose …
- Viola et al.
… flow deflectors that exert a side force in the streamnormal direction to oppose the expansion of the streamtube. The power harvesting and the side force exertion are modelled with sink terms … increases linearly with the side force, and it should be exerted from the upstream side edges of the array. We conclude that future arrays might not be made only of turbines that harvest power, but also of deflectors such as vertical wings of size comparable …
- Zhang et al.
… and maximum power point tracking reference speed simultaneously for each turbine. The benefits of this novel control strategy is tested in a 4.5 MW three-turbine array model which is simulated in MATLAB/Simulink. Results show that in low flow velocity, the objective of stabilizing the fluctuation of loads is mainly achieved by adjusting generator speed. Conversely, the pitch controller …
- Dai et al.
… load. We consider a tidal turbine rotor in a shear current at a diameter-based Reynolds number of 2×107. The blades are rigid and can passively pitch. A mass–spring system acts on the spanwise axis of the blade governing the pitch kinematics. The effectiveness of this system is demonstrated with three methodologies: an analytical model based on blade …
- Tan and Venugopal
… coexist, tidal flow can significantly alter wave parameters and hence affects the estimation of wave energy resources. This study uses a coupled wave-current numerical model to evaluate the influence of wave-current interactions on wave parameters. To achieve this, the simulation was performed in … evaluate the wave-current impact on wave parameters, a qualitative and quantitative analysis of these parameters is carried out, and the results are presented and discussed in the paper. The …
- Pizer
… evaluate the maximum power that can be absorbed from a linear three-dimensional multi-degree-of-freedom system. A weighted global constraint is imposed on the system's excursions to ensure that the assumptions of linear theory remain valid. The numerical solution gives good agreement with known semi-analytical results for the case of a heaving hemisphere. A surging hemisphere is also studied, from which the relative merits of …
- Moretti et al.
… This paper introduces a novel concept of Oscillating Wave Surge Converter, named Poly-Surge, provided with a Dielectric Elastomer … that employ rubber-like polymers to conceive deformable membrane capacitors capable of directly converting mechanical energy into electricity. In particular, a Parallelogram Shaped DEG is considered. In the paper, a description of the Poly-Surge is outlined and engineering considerations about the operation and control of …
- van Lanschot et al.
… in resource rich deeper more distant waters. The development in these fields is often ahead of policy, regulation and infrastructure. Previous studies often utilise spatial analytics to … make assessments but often overlook grid requirements. In order to address this issue a series of spatial analytic and electrical power flow models have been established to form a novel … power flow dispatch model. It was found that sensitivity analysis was needed at each stage of the modelling process. However, it forms the basis of strategic development tool that could be …
- Garcia-Teruel et al.
… Wave Energy Converter structures are associated with the highest percentage share of LCOE costs, however, existing geometry optimization studies just consider maximization of power production and, in some cases, mass as a proxy for structural costs. How to include cost … discussed here. Two different methodologies - depending on the available information and goal of the study - are presented, and example cases for these are given. The results show the …
- Sun et al.
… currents is substantial and considerable work has been conducted into determining the size of the resource and what the large-scale consequences of extraction might be. This paper describes the work conducted to establish a laboratory-scale … (CFD) code FLUENT™, in order to predict local-flow consequences resulting from the extraction of energy in two and three dimensions from within the water column in a tidal flow. As might be …
- Pennock et al.
… This work investigates potential cost reduction trajectories of three emerging offshore renewable energy technologies (floating offshore wind, tidal stream, … SET-Plan levelised cost targets. Component-based experience curves have been applied as part of the methodology, characterised through the comparative maturity level of each technology-specific cost centre. The resultant early-stage target costs are then compared …
- Pérez-Ortiz
… with analytical solutions for inviscid flow past a circular cylinder located in the centre of a channel and in the vicinity of a wall. The model is then validated against laboratory measurements of flow patterns for impulsively-started flow past a submerged circular cylinder, and for flow …
- Jeffrey et al.
… This paper presents a detailed analysis of the activities in which ocean energy public funding in the UK and the U.S. has been spent. It conducts a direct comparison of funding from the U.S. Department of Energy (DoE) with that from the UK and Scottish Governments. UK investment in the sector has …
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