This site-wide search returns results for all documents and events in Tethys Engineering, prioritizing the best matches. Partial word matches are returned (e.g. "engineer" finds "engineering"), but every entered term must be found. If you don't find any results, try reducing the number of words entered or removing special characters. Filters to the right can help narrow your search. Tethys Engineering features an integrated search with other marine renewable energy databases in PRIMRE - click the buttons below "Showing Results for" to search other integrated databases.
Showing Results for
- Journal Article:
Draycott et al.
… Experimental data was obtained in order to investigate the effect of waves on the loads and performance of tidal turbines. An instrumented 1:15 scale tidal turbine was installed in the FloWave Ocean … and environmental conditions obtained for five repeats of 24 wave conditions via https://doi.org/10.7488/ds/2472. A description of the data collection process, data processing, file …
- 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 …
- Journal Article: Noble et al.
Experimental Assessment of Flow, Performance, and Loads for Tidal Turbines in a Closely-Spaced Array
… array configurations where the downstream turbines are affected by the wake and/or bypass flow of upstream turbines. This work presents, for the first time, methods for and results from the physical testing of three 1/15 scale instrumented turbines configured in a closely-spaced staggered array, and … power extraction can be achieved through reduced array separation. A comprehensive set of flow measurements was taken during several weeks testing in the FloWave Ocean Energy Research … - 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:
Brooking and Mueller
… to convert the energy in sea waves directly into electrical energy. The reciprocating movement of the generator caused by the waves results in an electrical output that is variable in voltage and frequency, with a low-frequency amplitude oscillation of the same frequency as the reciprocating vertical movement of the waves. Power conditioning is required to extract the energy from the linear generator, and …
- Journal Article:
Price et al.
… a commonly used performance indicator for a wave energy converter (WEC). The capture width of a linear WEC is shown to depend on two properties: the spectral power fraction (a property … on the sea state, and the monochromatic capture width, which is determined by the geometry of the WEC and the chosen power take off (PTO) coefficients. Each of these properties is examined in detail. Capture width is shown to be a measure of how well …
- Journal Article:
de Andres et al.
… stage, with several challenges standing between the sector’s current status and the goal of commercial deployment. The study of how to reduce the cost of energy, to a level competitive with renewable energy alternatives, is an important aspect of …
- Journal Article:
Saruwatari et al.
… and impacting on the design conditions. Changes to the wave climate depend on the strength of the current and the relative wave direction. SWAN simulations of the wave climate around the Orkney Islands, with and without currents, show that considerable changes in the wave climate occur near sites of interest to wave and tidal energy project developers. Using circular statistics the effect of …
- Journal Article:
Draycott et al.
… Tidal turbines are subject to large hydrodynamic loads from combinations of currents and waves, which contribute significantly to fatigue, extreme loading and power flow … work, a 1:15 scale tidal turbine model is utilised to further the fundamental understanding of the influence of waves on tidal turbines. A wide range of regular waves are generated in both following-current …
- Conference Paper:
Mueller et al.
… are developed. Devices have common aspects such as moorings or seabed fixings, but the method of electrical power conversion can differ depending upon the device. Reliability analysis is …
- Journal Article:
Neill et al.
… results from one-dimensional model studies have demonstrated that large-scale exploitation of the tidal stream resource could have a significant impact on large-scale sediment dynamics. In this research, we model the impact that such exploitation would have on the dynamics of headland sand banks. Such sand banks, formed by the large eddies generated by strong tidal … dissipate energy. Therefore, a tidal energy converter (TEC) array developed in the vicinity of a headland could alter this natural form of coastal protection. Here, we investigate the …
- Journal Article:
Guy et al.
… for simulating tidal turbine non-steady hydrodynamic rotor load responses in the presence of turbulence, shear, and surface waves is developed. The model is validated using tank testing data from a lab-scale turbine. The validated model is then upscaled, to a power rating of 1.5 MW, and simulated in realistic wave–current conditions consistent with those of the MeyGen site. Mean torque and thrust are found to increase with turbine hub height, and the …
- Journal Article:
Medina-Lopez et al.
… This paper presents a numerical model to analyse the effects of changes in the bedforms morphology on Oscillating Water Column (OWC) wave energy devices. The … The seabed forms were reproduced with the morphodynamic model XBeach-G for a series of characteristic sea states in Playa Granada (southern Spain). These bedforms were used as input … bed geometries in FLUENT® and compared with a hypothetical flat seabed to analyse the effects of changes in bed level on the OWC performance. Results of the simulated sea states reveal the …
- 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, …
- Journal Article:
Medina-Lopez et al.
… This paper presents a complete methodology for an integrated simulation of the influence of seabed morphology on the performance of Oscillating Water Column wave energy converters. Different wave characteristics are tested, …
- Journal Article:
Medina-Lopez et al.
… reduces and the flow phase alters with respect to the ideal gas case. Accurate prediction of efficiency is essential for the optimal design and management of OWC wave energy converters. … 10.1016/j.energy.2017.06.164 …
- Conference Paper:
Dubon et al.
… Fatigue testing for tidal turbine blades involves the application of cyclic loads without matching the blade's natural frequency, which is challenging due to their high stiffness and associated thermal issues of composite materials at those frequencies (typically around 18Hz cycles). An auxiliary system … inefficient. To solve this problem, researchers utilized real on-site data to define a series of equivalent target loads and implemented them in FastBlade, which proved an efficient way to …
- Conference Paper:
Jordan et al.
… commercial array is limited to 6MW. Upcoming government support should see the size of such arrays increase by orders of magnitude, and thus the optimal placement of turbines within tidal arrays is an emerging challenge for successful commercial integration. …
- 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 …
Displaying 141 - 160 of 321