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- 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
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:
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:
Sentchev et al.
Alderney Race, located between the Alderney Island (UK) and Cotentin Peninsular (France), is a site with high tidal-stream energy potential. Circulation through Alderney Race is complex, largely dominated by tides with current speed exceeding 5 m/s at spring tide. Current velocity measurements from two bottom-mounted ADCP are used to assess the variability of velocity and turbulence in the…
- Book Chapter:
Ettema et al.
Floating tidal turbine systems have seen increasing popularity in recent years with floating devices designed to reduce installation and maintenance costs. This paper investigates whether the necessary buoyancy aids can also be used as a tidal fence sidewall to improve the hydrodynamic performance of the turbines. Following a numerical design process, an experimental investigation was…
- Book Chapter:
Narula
Marine renewable energy (MRE) is arguably the most underdeveloped form of renewable energy. However, its estimated potential as a renewable energy source is only next to solar energy, and hence, it can replace the existing fossil-based energy sources. Five different forms of MRE, viz., tidal barrage, tidal and ocean currents, wave power, ocean thermal energy conversion (OTEC), and salinity…
- Book Chapter:
Mayerle et al.
This chapter presents the results of the investigations leading to the development and application of a general procedure for the characterization of tidal current energy resources in data-poor sites. It implements methods to identify suitable sites for tidal power extraction, estimate effective power potentials, and assess impacts of tidal turbine arrays on the environment. The process relies…
- Book Chapter:
Khare et al.
Prior to installation and operation, the prefeasibility study of a tidal energy system is customarily carried out. The prefeasibility analysis includes the study of climatic conditions, longitude, latitude, a study of the coastal area, low and high tide and tidal current of the proposed site, and availability of tidal energy sources and assessment of its potential load and load demand of the…
- Book Chapter:
Dawson et al.
Composite materials are the natural choice for the construction of tidal energy blades; their high strength, good environmental resistance and the ease with which they may be used to form complex shapes means that they are well suited to the application. The design of MW-scale tidal energy blades has evolved over a number of years, keeping step with the requirements of turbine developers as…
- Book Chapter:
Jaksic et al.
The structural design of marine tidal turbine blades is governed by the hydrodynamic shape of the aerofoil, extreme loadings and composite material mechanical properties. The design of the aerofoil, chord and twist distribution along the blade is generated to optimise turbine performance over its life time. Structural design gives the optimal layout of composite laminae such that ultimate…
- Book Chapter:
Rafiei et al.
Over the last decade, research on technologies to exploit tidal current kinetic energy for renewable electricity generation has had a significant growth. However, as to date, there is not a consensus worldwide on standard Power Take-Off (PTO) systems, due to the current immaturity of tidal energy converter technologies. In most cases, mechanical/electrical power conversion follows well-proven…
- Book Chapter:
Clary et al.
A simple CFD modeling using force source terms in the momentum equation is implemented, with the aim of computing the performance of a Darrieus turbine in its exploitation area and simulating the wake created behind the turbine. It uses the RANS solution method to reproduce ambient turbulent flow conditions with relatively low computational costs. The force distribution used is three-…
- Book Chapter:
Woolf et al.
Increasing interest is apparent in marine energy resources, particularly tidal and wave. Some TeraWatts of energy propagate from the world’s oceans to its marginal seas in the form of surface waves (≈ 2 TW) and tides (≅ 2.6 TW) where that energy is naturally dissipated. The seas and coastlines around the UK and its neighbours are notable for dissipating a significant fraction of the global…
- Book Chapter:
Chala et al.
The utilization of renewable energy sources has significantly increased in the last decade to combat the dire impact of fossil fuel emissions and sustain green energy sources in the future. Consequently, various renewable energy sources have been considered for energy production to fulfill the growing energy demands. In this modern era, technologies with the capacity of generating electricity…
- Book Chapter:
McNaughton et al.
This paper reports on experiments on a pseudo four tidal stream turbine array. This was achieved by towing two side-by-side turbines adjacent to the sidewall of a tow tank, which acted as a symmetry plane. The 1.2 m diameter (d) rotors were tested with d/4 tip-to-tip spacing at SSPA in Sweden through the MaRINET2 Transnational Access Programme. Tests at different tow speeds demonstrated that…
- Book Chapter:
Thomson et al.
When conducting tidal energy resource characterization and assessment, it is important to capture the strong variations of tidal currents in time and space. Field measurements can quantify many of these variations, which have both deterministic and stochastic components. The deterministic components occur on timescales of hours to years. As such, they are repeatable and well-suited to harmonic…
- Book Chapter:
Hossain and Petrovic
The chapter explores the origins of ocean power, the three types of energy captured from the oceans, the energy from the motion of the waves, the energy from the tides, and from using temperature gradient in oceans. The main onshore and offshore ocean wave technologies are described. Tidal origins, fundamentals, and power-…
- Book Chapter:
Stallard
- Book Chapter:
Zhaoqing and Taiping. W.
Over the last decade, many studies have been conducted to estimate the upper limit of the theoretical resource of tidal stream energy and its associated influence on volume flux. However, studies aimed at evaluating the effects of tidal energy extraction on water exchange and transport timescale have been limited. This chapter provides a detailed review of different methods—from analytical…
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