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- Book Chapter:
Lynn
A huge effort is now under way to develop energy systems that make use of natural energy flows in the environment — including those produced by waves and tidal streams. Since the reduction of carbon emissions is a principal advantage of wave, tidal and other renewable technologies, one should recognise that this benefit is also proclaimed by supporters of nuclear power. This chapter considers…
- Book Chapter:
Lynn
This chapter presents a case study on tidal energy converters. It describes a number of devices at the forefront of development, many of which are being, or have been, tested at the European Marine Energy Centre (EMEC) in Orkney. The authors also raise a variety of practical issues that greatly affect device developers as they build, deploy and test devices which, in many cases, approach or…
- Book Chapter: Lynn
- Book Chapter:
Lynn
This chapter aims to shed light on such alternating current (AC) curiosities as reactance and impedance, real and reactive power and power factor correction to introduce the operating principles of electrical generators and explains how modern electronic control eases the problem of converting unruly marine energy into the well‐behaved electricity required by an electricity grid. Finally, the…
- Book Chapter:
Lynn
This chapter talks about marine energy capturing. It introduces the physics of ocean waves and tidal streams as a prelude to explaining the principles underlying some of today's most promising developments. Wave measurement buoys are used by marine energy organisations to provide the continuous, long‐term, data required by wave energy developers as they deploy their machines offshore. Wave…
- Book Chapter:
Bhatnagar et al.
Marine renewable energy generated from ocean tides and waves has not yet reached wide spread deployment or full commercial availability on par with comparable sources. This handbook chapter describes the global development of marine renewable energy technology and the most promising commercialization pathways, including “blue economy” marine applications, competitiveness in new electric grid…
- Book Chapter:
Davidson et al.
Wave energy conversion is an active field of research, aiming to harness the vast amounts of energy present in ocean waves. An essential development trajectory towards an economically competitive wave energy converter (WEC) requires early device experimentation and refinement using numerical tools. OpenFOAM ® is proving to be a useful numerical tool for WEC development, having been…
- Book Chapter:
Majumdar et al.
India being a tropical country, has a large ocean thermal gradient available throughout the year that can be utilized to extract energy. This energy can be used to power a Low-temperature thermal desalination (LTTD) plant using the Ocean Thermal Energy Conversion (OTEC) method. OTEC works at a very low pressure, and developing a low-pressure turbine for OTEC is very challenging. The turbine…
- Book Chapter:
Ringwood et al.
The modelling approach presented in this chapter is that of system identification, where models are determined from input/output data measured from the system under study. Models identified from recorded wave energy converter (WEC) data can accurately describe WEC behaviour, provided the data is of a sufficiently high quality. The chapter details generating data for the system identification…
- Book Chapter:
Mingham et al.
Fundamental principles of computational fluid dynamic (CFD) modelling are presented together with a brief review of CFD applied to wave energy converters. Results are presented for a range of models including incompressible and compressible two-phase flows. Limitations of CFD modelling are discussed together with future developments in CFD.
This is a chapter from…
- Book Chapter:
Fitzgerald
Fully nonlinear potential flow (FNPF) models extend the regime of validity of linear potential flow models to include wave–body interactions in steep sea-states and/or involving large body displacements. More accurate predictions of wave kinematics, wave forces, and body motions can be obtained, compared to linear model predictions for interactions involving large free-surface and body…
- Book Chapter:
Tavakoli et al.
Hydrokinetic energy contains the major uncontrolled source of renewable marine energy. The highest level of converter technology readiness offered in the last three decades is TRL8–9, which is related to the first-generation horizontal axis converters. In low-depth calm waters, one of the best options to harvest tidal energy is vertical axis turbines. About 16% of the…
- Book Chapter:
Babarit
Analogously to any energy system, it is interesting to quantify the performance of wave energy devices as the ratio between the energy absorbed and the energy available. This topic is the focus of this chapter. Firstly, it is important to recall the main theoretical results which, although most were obtained over 30 years ago, are often unknown to the wave energy community.
Nonetheless…
- Book Chapter:
Babarit
We mentioned the different working principles of wave energy conversion systems (WECs). In this chapter, we revisit each of them in detail. We begin with the working principles that might be described today as “classic” or “conventional” (due to their being at the center of studies and having already been implemented in prototypes, sometimes more than 30 years ago). We would also like to…
- Book Chapter:
Babarit
The number of inventions wave energy conversion has created is a remarkable aspect of the topic. Therefore, it is sometimes said that this would be the technological domain in which the largest number of patent applications were numbered (probably more than 3,000 at the current time). According to the website of the European Marine Energy Centre (EMEC), more than 200 wave energy converters…
- Magazine Article:
Harris
The power of the ocean is apparent to all and we are now much closer to harnessing that energy to power our lifestyle. According to the British Cartographic Society the length of coastline of Great Britain plus its principal islands is just shy of 20,000 miles, so it comes as no surprise that marine energy is considered to hold great potential as a future energy source. According to research…
- Book Chapter:
Mundon and Goldsmith
This chapter will discuss key aspects of wave energy and tidal energy as separate areas and will cover the key features of each resource, including the basic principles involved in generating electric power. It will then highlight the variability of the resources and explain how we can use modern tools to predict the power and energy output successfully.
- Book Chapter:
Babarit
In this chapter, we focus on the potential of ocean wave energy both from the energy resource and the electricity market standpoints. The issues are as follows: can ocean wave energy satisfy a significant part of the energy needs of humanity? Where are the main energy sources and what is the objective cost of energy so as to enable market penetration?
First, we include an ocean…
- Book Chapter:
Kregting and Elsäßer
The introduction of a large infrastructure of marine energy technology along coastal environments raises some concern on how this will impact on the marine environment. While there are a number of potential environmental impacts of wave energy devices (eg, collision) the focus of this chapter is on the primary ecological processes that may be influenced by changes in the hydrodynamics as a…
- 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 well-established recommended practices, standards, and guidelines. WECs, however, feature design and risk criteria departing from the aforementioned, requiring careful…
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