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- Robert et al.
… Tidal turbine arrays have considerable potential in providing a reliable source of renewable energy. Technology limitations are obstructing the fast development of the sector, however, one of which is the lack of knowledge of mechanical properties of submerged composites used to build …
- Hudson et al.
… Installation, operations and maintenance costs represent one of the major barriers to the growth of wave and tidal-stream energy projects and a cost that can be significantly reduced in offshore … strategies can help minimise these costs. To achieve realistic and comprehensive estimates of project duration using these tools, it is essential to represent accurately the durations and …
- Pawitan et al.
… The development of oscillating water column (OWC) wave energy converter (WEC) has been very extensive in the last … experiment involves a small-scale physical model, pressure transducer, and wave gauges in the University of Edinburgh long wave flume facility. The results show that sloshing is more likely to occur in the …
- Wakelam et al.
… To enable accurate prediction of performance, loading and lifetime fatigue, the operating environment of tidal stream turbines must be comprehensively characterised over a range of seasons and tidal cycles. The met-ocean dataset acquired at the European Marine Energy Centre …
- Crozier et al.
… The high operation and maintenance (O&M) costs of wave energy converters are a large impediment to the technology’s development. Magnetic gears … suffer considerably less wear than mechanical alternatives. This paper presents the results of a dynamic analysis of a magnetically geared power take off system that has been designed for use with an oscillating …
- Burchell et al.
… for Wave Energy Convertor (WEC) designers and manufacturers is the efficient conversion of differing wave types into useful motion to produce electricity. The height, period and orientation of waves vary greatly as do their respective power levels [1]. In order to efficiently and cost effectively convert the kinetic energy of wave motion into electrical energy, a Power Take Off (PTO) system must be able to withstand …
- van Lanschot et al.
… The following paper examines how the marine zone of Europe is influenced by several key engineering and nonengineering restrictions for the case study of 3 offshore renewable technology types, an attenuating wave energy converter, a floating wind … jacket frame. It assesses the site characteristics associated with the devices and the levels of impact that can have on site suitability. The onshore infrastructure requirements for ports …
- Roberts et al.
… The high number of design options and prototyping activity within the wave energy sector indicates that it is in a conceptual stage of development. It therefore inappropriate to narrow the design focus and an effort should be … process, whereby the widest possible parameter space is evaluated based upon the requirements of wave energy extraction. In this preliminary study a model is used to calculate financial merit …
- Stiven et al.
… This research examines the impact of accuracy in tidal current energy resource assessment on the likely economics of a tidal array project, ultimately estimating the impact of resource uncertainty on overall lifetime project economics. The analysis utilises field data …
- Noble et al.
… scale model testing is an important development tool, used extensively to study the behaviour of marine devices, vessels and structures in a controlled environment prior to deployment at sea. … renewable energy devices has been published over the past decade, it has limitations in terms of advanced environmental conditions for testing. The body of existing guidance is reviewed, and initial suggestions offered for additional test conditions …
- 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 …
- 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 …
- 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 …
- Ferguson et al.
… is intermittent, so energy storage technologies are necessary to ensure a secure supply of energy. One option is hydrogen, which has applicability for seasonal energy storage and as … grid electricity is not used, by reducing minimum plant capacities. This shows the importance of choosing favourable business models and plant operation strategies when developing proposals. …
- Cuthill et al.
… The structural lifetime fatigue testing of tidal turbine blades is currently a challenge faced by the tidal industry. Due to the high stiffness and short length of composite tidal blades, it is not possible to perform resonant fatigue testing in the same way … too high a natural frequency which, if tested resonantly, would result in internal heating of the composite and lead to premature failure. The aerospace industry uses conventional …
- Zhang et al.
… revenue, and reducing unexpected maintenance will reduce operation and maintenance cost. Both of these help to reduce levelized cost of energy, in order to enhance tidal energy competitiveness. This paper presents a novel control … to reduce the loadings on tidal current turbines, while still enabling a significant amount of the available power to be extracted. The control strategy is based on adjusting the axial …
- Finlay et al.
… tidal resonance in the channel, a simple two dimensional model has been developed for a series of simulated estuaries, ranging from a simple box channel with a uniform flat bed to a simple wedge shaped channel with a solid barrier across, to a simulation of the Severn Estuary with topographic and bathymetric values. These modelsshow amplitudes and phases of elevation and current flow for each model scenario. model outputs show that overall tidal …
- Caraher et al.
… useful technology for wave power applications. Typically, optimisation and comparison of these generators is based on an electromagnetic analysis with limited regard for the structural analysis. This paper presents a comparison of two alternative designs of the double-sided linear permanent magnet synchronous machine which includes structural and …
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