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- Journal Article: Lavidas and Venugopal
A 35 year high-resolution wave atlas for nearshore energy production and economics at the Aegean Sea
… with wave energy converters power matrices to provide for the first time a long-term analysis of expected power production. Performance of devices is highly dependent on matching the power matrix to the local resource, suitable … high frequencies. Based on energy analysis data, an economic performance and payback period of a hypothetical wave farm is examined. With little information on wave energy in the region, … - Conference Paper:
Hodgins 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. Two rotary prototypes of 15 & 20kW have been constructed and tested and the 15kW prototype has been fitted to a wind …
- Conference Paper:
Salter
… The equation used for predicting the output of a wind turbine in an open flow field uses the cube of wind velocity. But the correct equation for an hydraulic machine in a closed duct uses the first power of flow rate times the pressure head. This paper argues that the second equation should be used …
- Conference Paper:
Iyer et al.
… be economically exploited, certain conditions need to be fulfilled. Principally the strength of the resource needs to be quantified before it can be effectively utilised. This paper will … datasets have so far typically been used to examine the resource. A methodology to combine all of the available datasets to produce an improved resource assessment methodology is desirable. … only be suitable if there is good correlation and consistency between them. The suitability of combining three UK wide datasets will be examined in this analysis. The data sources …
- Journal Article:
Draycott et al.
… energy sector has challenging requirements related to the physical simulation of the ocean environment for the purpose of evaluating energy generating technologies. In this paper the demands of the wave and tidal energy sectors are considered, with measurement and characterisation of the …
- Conference Paper:
Finlay et al.
… tidal resonance in the channel, a simple two dimensional model has been developed for a series of simulated estuaries, ranging from a simple box channel with a uniform flat bed to a simple wedge shaped channel with a solid barrier across, to a simulation of the Severn Estuary with topographic and bathymetric values. These modelsshow amplitudes and phases of elevation and current flow for each model scenario. model outputs show that overall tidal …
- Conference Paper:
Caraher et al.
… useful technology for wave power applications. Typically, optimisation and comparison of these generators is based on an electromagnetic analysis with limited regard for the structural analysis. This paper presents a comparison of two alternative designs of the double-sided linear permanent magnet synchronous machine which includes structural and …
- Conference Paper:
Maguire and Ingram
… For most of the twentieth century naval hydrodynamics, and more recently, wave energy hydrodynamics have been limited to the realms of theory and physical experiments. Both of these methods of fluid flow analysis are constrained through scope, cost and size of facility. …
- Conference Paper:
Gretton et al.
… Results from a computational fluid dynamics (CFD) model of a vertical axis tidal current turbine are presented. This CFD model has been implemented in … model. The turbine simulated is a 15 kW small-scale prototype device being developed by Edinburgh Designs Ltd. with independently and continuously variable pitch blades. A major focus of the present work is the thorough verification and validation of the numerical model. This is …
- Conference Paper:
Price et al.
… This paper discusses the restrictions on frequency domain modelling of wave energy converters (WECs). It is shown that, for a model where the radiation is … a frequency domain model is suitable for finding the post-transient, linear, causal response of a WEC. The common use of models that do not represent the casual nature of radiation (memory), or that include an …
- Conference Paper:
Mueller et al.
… This paper summarises UKERC roadmapping activity in the last 12 to 18 months. A summary of previous activity is provided since the start in April 2005, to put the current status in context. Results of questionnaires and discussion summaries are presented in the paper, which shows that UKERC has … criticism was provided in the discussions at the Oxford workshop to assist in the development of the road-map. All the data collected since the start of the road-map is being collated and …
- Conference Paper:
Sellar et al.
… Marine energy converters will require the implementation of control strategies to achieve viability in some cases and maximise profitability in most. … require distributed information on the wave field in which the device resides. A novel method of obtaining this data is investigated using a lattice of treated optical fibres constrained on a flexible substrate and fitted with floatation aids. By …
- Conference Paper:
Price and Wallace
… The prediction of near future wave excitation force is the fundamental problem associated with optimal control of a wave energy converter. This becomes clear when the latching technique is considered. In this case the central control problem is the choice of the moment at which to release the latched working surface, such that the resulting velocity …
- Conference Paper:
Child and Venugopal
… A method is presented to analyse wave interactions with an array of simplified wave energy devices. The problem is formulated in terms of a group of heaving vertical circular cylinders floating in the ocean, whose motion is damped by their …
- Conference Paper:
Gretton and Bruce
… Hydrofoil section data, comprising coefficients of lift and drag, are a key input into blade element momentum models of turbines. The aim of this paper is to investigate whether differences in this section data are to account for the …
- Conference Paper:
Mueller et al.
… The evolution of a novel permanent magnet (PM) generator topology is described in the paper. It has the … for direct drive applications in wind, wave and tidal current generators. The philosophy of the generator concept is based upon reducing the structural mass by eliminating large unwanted … available rotary PM generator for a 100kW turbine is presented to show the potential of the new topology … 10728 …
- Conference Paper:
Payne
… any graphical user interface. Instead, input settings are entered into the program by means of text files. Computation results are output in the same way. Preparation of the input files and post-processing of the outputs is often time consuming and repetitive. This paper presents a graphical user …
- Conference Paper:
Pascal and Bryden
… This paper presents a PhD project aimed to improve the reliability of production estimation of Wave Energy Converter from the performace description and the statistical description of a wave climate. So far, a review of the different spectral parameters has been done. The …
- Conference Paper:
Bailey and Bryden
… effect that a mono-directional Power Take Off (PTO) has on the motions and power extraction of a Wave Energy Converter (WEC). A mono-directional damper is one where the resisting force only operates in one direction. The model comprises of a cylinder that is restrained to move in heave, reacting against an internal mass (also … mono-directional damper in parallel. This paper presents experimental results for a variety of different damping constants for mono-directional dampers which operate in both in expansion …
- Conference Paper:
Jeffrey et al.
… This paper provides an overview of the UKERC technology roadmap and its proposed internationalization. It describes a route for … to technology development in the ocean energy sector, whilst taking into account the needs of other stakeholders. The successful implementation of the technology roadmap depends upon a number of complex interactions between commercial, …
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