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- Journal Article:
Moñino et al.
… energy from waves, the Oscillating Water Column (OWC) operating an air turbine has been one of the most studied in recent years. The aim of this paper is to study the polytropic exponent associated to the thermodynamic process that … turbine in a non-idealised environment. A real gas model is applied, considering the influence of the moisture in the air chamber. Experimental data from a simplified OWC chamber set up under …
- Conference Paper:
Greenwood et al.
… This paper presents the results of a numerical wave modelling study carried out to assess the near shore wave energy resource … are obtained from a Datawell directional wave buoy located approximately 16 km off the coast of Lewis in 60 metre depth. Additional data collected from a submerged Acoustic Wave and Current profiler (AWAC) located at 13 metre depth offshore at one of the wave energy development sites was used to calibrate and validate the wave model for …
- Conference Paper:
Jaksic et al.
… high cost and reliability during its life expectancy. The blades make up a significant part of total tidal turbine cost. Hence, the capital cost reduction and the structural reliability of blades are the key factors in a tidal turbine development. This study examines the possibility of replacing Glass Fibre Reinforced Composites (GFRP) with Carbon Fibre Reinforced Composites …
- Journal Article:
Harcourt et al.
… to deliver predictable energy to the electricity grid, subject to the known variability of the tides. Tidal power plants inherently feature advantages that characterise hydro-power more … relative to other renewable options is the partial flexibility it possesses over the timing of power generation. In this study we provide details on a design methodology targeted at the optimisation of the temporal operation of a tidal range energy structure, specifically the Swansea Bay tidal …
- Journal Article:
Hiles et al.
… Critical to evaluating the economic viability of a wave energy project is: (1) a robust estimate of the electricity production throughout the project lifetime and (2) an understanding of the uncertainty associated with said estimate. Standardization efforts have established mean …
- Conference Paper:
Viola et al.
… could be achieved through blades that passively and elastically adapt their camber and angle of attack to counteract unsteady flow conditions. Firstly, we discuss the underlying principles of unsteady thrust mitigation. We show that complete cancellation of the thrust fluctuations would be possible if every blade section could pitch passively and …
- Conference Paper:
Draycott et al.
… —Wave buoys are used extensively for the characterisation of deployment locations for offshore technologies, where they are subjected to currents in … that the measurements from wave buoys are affected by these currents, but the majority of deployed buoys cannot measure, or account for, this effect. Presented here are a series of experiments conducted at the FloWave Ocean Energy Research Facility, deploying a spherical …
- Journal Article:
Sutherland et al.
… scale tidal energy devices are shortly to be deployed in the first arrays, the knowledge of how different array layouts perform is a key and under-examined field. Here, the Momentum Reversal Lift (MRL) turbine, developed by the University of Exeter, is deployed in five different array layouts utilising up to 15 devices. The use of …
- Journal Article:
Pillai et al.
… Despite this, currents are often ignored and wave buoy data is processed without consideration of the current or the wave-current interaction. This data is subsequently used in design, yet sea … may have significant errors. Here we present a novel framework for the processing of wave buoy data to account for the effect of a current. We use a mesh adaptive direct search (MADS) algorithm to solve for the current and …
- Conference Paper:
McDowell et al.
… Understanding and incorporating these MetOcean site characteristics into the initial stages of a feasibility study, will increase the accuracy of economic viability predictions. A more comprehensive approach will assist in building investor … previously overlooked or unknown lifetime costs can be estimated and included in the choice of ultimate deployment location. Freely available astronomic, bathymetric and meteorological data …
- Journal Article:
Mejia-Olivares et al.
… interest in harnessing renewable energy resources in Latin America. Converting the energy of the tides into electricity has the distinct advantage of being predictable, yet the tidal range resource of Latin America is largely unquantified. The northern part of the Gulf of California (GC) in …
- Journal Article: Payne et al.
Variation of loads on a three-bladed horizontal axis tidal turbine with frequency and blade position
… Sustainable and cost effective design for tidal current turbines requires knowledge of the complex nature of unsteady loads on turbine components including blades, rotor and support structure. This study … All the experimental measurements presented in this article can be accessed from http://dx.doi.org/10.7488/ds/2423. … 10.1016/j.jfluidstructs.2018.08.010 … - Journal Article:
Rahim et al.
… as coal, oil, and gas. However, the alarming increase in CO 2 emissions and the depletion of fossil fuel reserves have given rise to imminent challenges in meeting the strong demand for electricity in Malaysia. Thus, this paper explores various types of tidal stream devices that have been experimentally developed for electricity generation and … with a specific focus on potential devices to be implemented in the shallow water environment of Malaysia. These devices are chosen based on the average Malaysian tidal stream velocity, which …
- Journal Article:
Garcia-Teruel et al.
… It is key in the development of wave energy systems to aim at designing economically competitive solutions that enable maximal … studies identify the Wave Energy Converter (WEC) structure, i.e. the hull, to have one of the largest cost reduction potentials. Due to this potential, geometry optimisation of WECs has been previously considered, however, most of these studies have been limited by the …
- Conference Paper:
Clark et al.
… loads (DELs) for a PTO given three hull shapes (a cylinder, a sphere, and a barge), two sets of metocean conditions (from the center of the North Sea and off the west coast of Norway), and two float motions (heave and surge). Results indicate that hull geometry has a …
- Journal Article:
Greenwood et al.
… This paper presents results from numerical simulations of three Oscillating Wave Surge Converters (OWSC) using two different computational models, Boussinesq wave (BW) and Spectral wave (SW) of the commercial software suite MIKE. The simulation of a shallow water wave farm applies alternative methods for implementing a frequency dependent …
- Journal Article:
Payne et al.
… typically requires fast and steady rotary motion. This article investigates the performance of a hydraulic transmission system based on Digital Displacement™ technology, which allows variable speed of the tidal current turbine rotor while maintaining constant generator shaft speed. The case study of a generic horizontal axis tidal turbine is considered. Control strategies based on rotor …
- Journal Article:
Ewing et al.
… For established technologies, reliability prediction either involves a statistical assessment of historical failure data, or a physics of failure approach based on dedicated accelerated testing. However, for low/mid Technology … tidal developers these common approaches are difficult. Thus, developers require a method of making reliability predictions for components in the absence of tidal turbine specific failure …
- Journal Article:
Edwards et al.
… Interest in wave energy as a viable renewable energy has increased greatly in the past couple of decades. To determine the potential that a certain location has to harvest wave energy, a … for deployment as well as the design and operating sea states. This study shows the level of sophistication that must be included in the verification process within a wave resource … methodology in two articles. Part 1 described a procedure for a complete statistical analysis of the fit of the model. This paper will demonstrate how investigating systematic trends in the …
- Conference Paper:
Vogler and Venugopal
… The Outer Hebrides of Scotland were identified as an area with a high wave power resource of 42.4kW/m. The Outer Hebrides of Scotland are currently targeted by a range of developers for demonstration and commercial …
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