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- Report:
Payne
… Experimental tank testing is a key aspect of wave energy conversion research. The performance of designs can be assessed in an accessible … document is based on tank testing practices that have been developed over the years at the University of Edinburgh. As such it is focused on the use of equipment that has been developed by the …
- Journal Article:
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 …
- Thesis:
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 …
- Journal Article:
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 …
- Journal Article:
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 …
- Conference Paper:
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 …
- Journal Article:
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. …
- Journal Article:
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 …
- Journal Article:
Garcia-Teruel and Forehand
… through proxies based on the device's size. When using an optimisation process capable of generating very diverse shapes, more complex objective functions may be required to ensure that resulting shapes truly minimise the levelised cost of energy. For this purpose, relevant cost factors with an effect on geometry, such as …
- Journal Article:
Agarwal et al.
… The accurate estimation of extreme conditions, such as 100-yr return levels of significant wave height is an important aspect in the design of marine energy converters, offshore and coastal structures. This study investigates the …
- Report:
Jeffery and Grattan
… with Wave Energy Scotland, the Energy Technology Partnership, and Supergen ORE Hub, the University of Edinburgh's Policy and Innovation Group has released their UK Ocean Energy Review 2021. The …
- Journal Article:
Draycott et al.
… loads experienced by tidal stream turbines. Over a tidal cycle, the magnitude and direction of the current velocity changes and hence so does the combined wave–current conditions the … along with the turbine performance and loads, are demonstrated through the presentation of temporal, spectral and statistical outputs. The experimental results demonstrate that the … current and 1.56 m in 3.2m/s following current. The corresponding standard deviations of measured turbine parameters for the opposing condition range between 215 and 260% of the …
- Conference Paper:
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 …
- Journal Article:
Cotten and Forehand
… The WaveTrain device is a wave energy converter concept designed to extend the high performance of buoys that undergo sloped motion into a deep water environment. It achieves this by mechanically interconnecting a series of sloped modules, amongst which restorative forces can be exchanged in order to prevent … free motion along the inclined axis is retained. Importantly, this circumvents the requirement of a rigid seabed connection, but introduces a potential vulnerability of operational failure of …
- Conference Paper:
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. …
- Conference Paper:
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 …
- Journal Article:
Couch and Bryden
… There is an apparent lack of understanding of the tidal resource and its response to harvesting of energy among the principal proponents of the fledgling UK tidal energy industry: the device …
- Journal Article:
Alam et al.
… The aging of polymer-composites is a ubiquitous problem that leads to the degradation of mechanical properties, reducing the service life of an engineered structure, and potentialising premature, catastrophic modes of failure. …
- Journal Article:
Martinez et al.
… deployment stage and costs need to be reduced to improve the long term economic viability of the sector. High costs of tidal turbines are, in part, the result of load uncertainties, which … for a 1:15 scale model tested in the FloWave circular, combined wave and current basin at the University of Edinburgh (UK). Three different flow directions were tested and each of them were also combined …
- Journal Article:
Draycott et al.
… scaled tidal turbine is tested in short-duration focused wave groups representative of extreme environmental load cases expected at energetic tidal sites. In this paper, the … are reported. These measurements are found to strongly follow the spectral and temporal form of the focused wave conditions, and peak loads and power output are found to exceed current-only … values by 85% and 200% respectively. These rotor-averaged values display a high level of repeatability, demonstrating the suitability of focused waves for testing seabed-mounted tidal …
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