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- Journal Article:
Badoe et al.
… the results would differ in a larger scale environment where the flow is more representative of real-world conditions, being either unsteady or non-uniform. In this work, the effectiveness of a generalised actuator disk-computational fluid dynamics (GAD-CFD) approach in accurately … A unique large-scale experimental facility, FloWave, has been used to conduct physical testing of three instrumented model tidal energy converters of rotor diameter 1.2 m under differing …
- Journal Article:
Bonar et al.
… the turbines within these arrays are identical, such models do not consider the possibility of enhanced power production through the exploitation of spanwise variations in local blockage and resistance. In this paper, we use depth-averaged numerical simulations to investigate whether the performance of a tidal turbine array can be further enhanced by varying solely the local blockage, solely the …
- Conference Paper:
Venugopal and Smith
… This paper presents the results of a study carried out to determine the change in wave climate around an array of hypothetical wave devices. The main objective of this work is to investigate the change in wave height in the upstream and downstream of the …
- Journal Article:
Borg et al.
… Introducing a duct along the perimeter of a rotor has been acknowledged to augment turbine performance. The outcome causation due to a … shroud, however, is uncertain. This study analyses the hydrodynamic swallowing capacity of a true-scale, vacant duct for tidal turbine applications in aligned and yawed inlet flow … computational fluid dynamics. The performance is investigated within free-stream magnitudes of 1 to 7 m.s −1 , and a bearing angular range of 0° to 45° with the duct axis. In proportion to …
- Journal Article:
Payne et al.
… Laboratory testing of tidal turbine models is an essential tool to investigate hydrodynamic interactions between … numerical models and to estimate rotor loading and wake development to inform the design of full scale machines and array layout. The details of the design and manufacturing techniques used to develop a highly instrumented turbine model …
- Journal Article:
McGilton et al.
… The marine energy industry is in its early stages but has a large potential for growth. One of the most significant challenges is the reduction of operation and maintenance costs. Magnetic gears (MGs) offer the potential for long periods … frictionless torque transmission which could reduce these costs. This study presents a summary of the state of the art in MG technology and then investigates its potential for marine energy …
- Journal Article: Li et al.
Modelling dynamic loadings of a tidal stream turbine in combined wave-current-turbulence environment
… The understanding of hydrodynamic loadings on a Tidal Stream Turbine (TST) is important to its design, deployment … model has been validated by comparing its outputs to the scale model tests conducted in Edinburgh University’s FloWave wave-current facility. The impact of combined waves, currents, and … - Conference Paper:
Smith et al.
… The assessment of energy production from a wave energy converter commonly uses a stochastic approach. For … If a suitable frequency-dependent transfer function for the device is defined, an estimate of the total energy output for that specific sea state can be made. However, using a spectral averaging of the sea state in this way fails to account for short-term events that may significantly alter …
- Conference Paper:
Stegman et al.
… This paper proposes a method that could be of use to developers when considering designs improvements, or to investors considering a range of opportunities. The methodology shows how improvements to designs can be developed using systematic problem solving tools and the Theory of Inventive Thinking (TRIZ). The methodology is demonstrated in this study, using high level …
- Conference Paper:
Bivol et al.
… PLAT-O #2 is a subsea floating tidal energy generator. A scaled-down physical model of this device was tested at FloWave in steady axial currents of up to 6.2 m/s (full-scale). The platform’s motion and mooring tensions were measured to … squat in an arc motion about the upstream lines to a stable lower depth, to balance the forces of drag, thrust, net buoyancy and lift. Hydrodynamic characteristics of the platform are derived …
- Conference Paper:
Mullings et al.
… Accurate assessment of the fatigue life of tidal stream turbines and components requires prediction of the unsteady loading of turbine components over a wide range of frequencies. This study …
- Conference Paper:
Ewing et al.
… no published reliability data for Tidal Stream Turbines (TST’s). Thus, reliability assessments of failure critical components are highly uncertain. To reduce the Levelised cost of energy (LCoE) of TST technology it is critical to be able to perform accurate reliability assessments of …
- Journal Article:
Scarlett et al.
… blade can experience stall delay, load hysteresis and dynamic stall. Yet, the significance of these effects for a full-scale axial-flow turbine are unclear. To investigate, we develop a simple model for the unsteady hydrodynamics of the rotor and consider field measurements of the onset flow. We find that when the rotor operates in large, yet realistic wave conditions, …
- Book Chapter:
Vaughan and Ferreira
… The assessment of structural loads and design of wave energy converters (WECs) has primarily been driven by the expertise of the oil and gas (O&G), offshore wind and maritime industries. This includes application of …
- Journal Article:
Ortega et al.
… Production of electricity using hydrokinetic tidal turbines has many challenges that must be overcome to … the performance of a 1.2 m diameter, three-bladed horizontal axis tidal turbine tested in the University of Edinburgh FloWave Ocean Energy Research Facility. The turbulent flow around the blades and the …
- Journal Article:
Vanegas-Cantarero et al.
… strengthening supply chains and supporting legal frameworks. Consequently, the choice of renewable energy technologies should be based on a comprehensive assessment addressing the … that are affected. Clean energy technologies are traditionally evaluated on the basis of their techno-economic performance. Such an approach penalises emerging energy technologies … that are generally more capital-intensive given their innovation requirement and the lack of support mechanisms facilitating their industrial roll-out. In this paper, a multi-criteria …
- Journal Article:
Pascal and Payne
… referred to as the ‘original study’ and whose prior reading is recommended to make the most of what follows), the authors explored the concept of sloped power take-off (PTO) for a free-floating wave energy converter (WEC) using linear potential flow theory. Part of the study focused on the optimization of four parameters: the mass reference m2, its vertical …
- Journal Article:
Sandberg et al.
… This paper examines technical and non-technical factors that are critical to the viability of commercialization of wave energy converters in off-grid luxury resorts and small utilities. Critical factors are found by investigating Levelized Cost of Energy, and using the tools PESTEL and Porter’s five competitive forces. Identified factors …
- Journal Article:
Grogan et al.
… The lifespan and economic viability of tidal energy devices are constrained, in part, by the complex degradation of the tidal turbine blade materials due to prolonged immersion in a hostile sub-sea environment. … degradation mechanism in composite materials. This work aims to investigate the influence of microstructure and hydrostatic pressure on water absorption in four polymer composites which …
- Journal Article:
Pascal et al.
… developers, governments and investors to be able to reliably estimate the energy production of devices as a function of the sea states they are to be deployed in. This estimation has traditionally relied on only … account for frequency or directional spreading. The present paper investigates the suitability of further parameters to refine performance predictions. This is achieved through extensive wave …
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