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- Journal Article:
Frost et al.
… a site off the welsh coast with Computational Fluid Dynamics (CFD) to determine the effects of misaligned flows on the performance of a tidal stream turbine. The field observations indicate that the majority of the currents tend to fall within ±20° of the principal flow direction for economically viable …
- Conference Paper:
Price et al.
… The HAPiGYM is a collection of numerical and experimental modelling environments for testing control of wave energy converters (WECs). It has two applications: rapid prototyping of the control policies themselves, and co-design of control and other WEC subsystems. This …
- Journal Article:
Zhang et al.
… conditions due to variability in ocean current directions. Insight into the wake structure of yawed turbines can be essential to ensure efficient tidal stream energy extraction, especially … for turbine arrays where wake interactions emerge. We studied experimentally the effects of turbines operating under varying yaw conditions. Two scenarios, including a single turbine and a set of two turbines in alignment, were configured and compared. The turbine thrust force results …
- Journal Article:
Coles et al.
… This study quantifies the technical, economic and environmental performance of hybrid systems that use either a tidal stream or wind turbine, alongside short-term battery … oil generators. The systems are designed to partially displace oil generators on the island of Alderney, located in the British Channel Islands. The tidal stream turbine provides four power … periods per day, every day. This relatively high frequency power cycling limits the use of the oil generators to 1.6 GWh/year. In contrast, low wind resource periods can last for days, …
- Conference Paper:
Polinder et al.
… The objective of this paper is to review linear generator systems for wave energy conversion and the research issues related to this. The paper starts with a short review of wave energy conversion, indicating that the different wave energy conversion systems that have been presented in literature have very different generator systems. Next, a few state-of-the-art linear generator systems are discussed, such as the linear generator of the Archimedes …
- Journal Article:
Cradden et al.
… particularly over a large region, has been explored previously but at a relatively low level of detail. Here, bespoke resource data from high resolution co-located, co-temporal wind and wave models are presented in a GIS with a range of additional environmental and physical parameters. Dedicated decision-support tools have been … energy platforms, focusing on the energy resources available. Time-series tools highlight some of the more detailed factors impacting on a site-selection decision. The results show that the …
- Journal Article:
Nambiar et al.
… different renewable energy targets set by various governments and world bodies. To make use of this potential, the industry will soon be moving from sea testing of individual wave energy converters (WECs) to the deployment of arrays and farms of WECs. The … to contribute to meeting the 2020 and 2050 targets for offshore renewable energy. … doi.org/10.1016/j.ijome.2014.11.002 …
- Journal Article:
Mackie et al.
… The extraction of tidal energy from head differences represents a predictable and flexible option for generating electricity. Here, we investigate the generation potential of prospective tidal power plants in the UK. Originally conceived as separate projects, operating … cooperative system could prove beneficial. Combined with the inherent operational flexibility of tidal range-based schemes, a notable tidal phase difference in selected sites allows for the …
- Journal Article:
Keysan et al.
… aimed at reducing overall system mass in direct drive power takeoff applications. The design of a C-GEN generator requires the combination of electromagnetic, structural and thermal models. Models used in the development of design tools applicable to both rotary and linear C-GEN generators are described in this …
- Conference Paper:
Frost et al.
… high level economic model has been developed to map wave energy performance and levelised cost of energy (LCOE). It takes time-series, gridded hindcast wave data, for example generated by SWAN … have been generated for Albatern Ltd, a Scottish wave energy developer and industrial partner of the research project. Their technology is the WaveNET, a small-scale array based device which … scales. The results found that, while the larger device performs better over the majority of the area, there are places where the smaller device has a better LCOE, sometimes by as much as …
- Journal Article:
Anderlini et al.
… A model-free algorithm is developed for the reactive control of a wave energy converter. Artificial neural networks are used to map the significant wave … time horizon spanning multiple wave cycles, with data being collected throughout the lifetime of the device so as to train the networks off-line every 20 time horizons. Initially, random … optimization is employed, which uses the neural networks within the cost function. The aim of the optimization is to maximise energy absorption, whilst limiting the displacement to prevent …
- Journal Article:
Naberezhnykh et al.
… in the global energy supply due to decarbonisation and energy security aims. A vital aspect of renewable energy systems will be the predictability of the energy source, something that tidal stream energy can provide. The tidal sites suitable … Developers use Blade Element Momentum (BEM) models to predict loading and improve designs of TECs. To simulate turbulence effects within these models, a synthetic flow field is generated …
- Conference Paper:
Samuel et al.
… The design of moored floating wave energy converters (WECs) must take into account extreme responses and … was conducted on a Froude scale of 1 in 50 at the FloWave Ocean Energy Research Facility, University of Edinburgh. The experiments involved the use of NewWaves focusing of crest and trough at the model …
- Conference Paper:
Hiles et al.
… The influence of the dimensionality of the performance matrix and the duration of the performance data series on the power performance assessments by the IEC/TS-62600-100 and …
- Journal Article:
Garcia-Teruel and Clark
… loading (DEL). Optimised hull geometries for two sites are considered (from the centre of the North Sea and off the west coast of Norway), and two directions of motions (heave and surge). Results indicate that site characteristics affect the potential …
- Conference Paper:
McKeever et al.
… within the generator, thus creating the potential to reduce the size, weight and cost of the energy conversion system. “Snapper” is being developed under a €1.3million development grant awarded by the European Union’s Framework 7 Programme. The objective of the project is to develop and validate a prototype “Snapper” system. A multidisciplinary consortium consisting of 6 industrial partners and 2 research organisations from across Europe are involved in the …
- Conference Paper:
Vertechy et al.
… ave energy harvesting is one of the most promising applications for Dielectric Elastomer Generators. A simple and interesting concept of a Wave Energy Converter based on Dielectric Elastomers is the Polymeric Oscillating Water Column (Poly-OWC). In this paper, preliminary experimental results on the assessment of a small-scale Poly-OWC prototype are presented. The scale of the considered prototype is 1:50. …
- Journal Article:
Kennedy et al.
… large thrust and torsional loadings, relative to wind turbine blades, due to the high density of seawater, among other factors. The complex combination of these loadings, as well as water ingress and associated composite laminate saturation, have … scalability, energy production and cost-effectiveness. This study investigates the effect of seawater ingress on composite material properties, and the associated design and life …
- Conference Paper:
McKeever et al.
… This paper presents the development of a novel rare-earth magnet based wave power conversion system called Snapper. The Snapper … within its generator, thus creating the potential to reduce the size, weight and cost of the energy conversion system. This paper focuses on the generator, discusses the Snapper concept and also discusses the development of a prototype machine. In particular, attention is paid to the use of rare-earth magnets and …
- Journal Article:
Fàbregas Flavià et al.
… introduced by Kagemoto H. and Yue (1986) enables one to drastically speed up the computation of the added mass, damping and excitation force coefficients of a group (”farm”) of floating bodies when compared to direct calculations with standard widely available boundary …
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