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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
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:
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:
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:
Nagaraja et al.
The existence of sunlight, air, and different resources on Earth must be used wisely for human welfare while also safeguarding the environment and its living creatures. The use of the sunlight and air as a significant source of renewable energy (RE) is already an object of research and development in recent years. The high integration costs of various RE energy sources are a significant hurdle…
- 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:
Tong
Water’s natural flowing movements, such as in rivers and reservoirs, can be used in the production of electricity. Furthermore, both the tidal range (the periodic rise and fall of the sea level) and the energy contained in flow and waves can be used in the ocean energy system. Both types of energy conversion are classed as renewable energies. While the typical use of hydropower has been…
- Book Chapter:
Khan
The chapter describes the geological and legal aspects of the continental margin, including its marine resources, of the Bay of Bengal, especially its northern part adjacent to Bangladesh. The maximum width of the continental shelf is 216 km (117 nm, nautical miles) from the Bangladesh coastal plain. On the contrary, court verdicts have given Bangladesh entitlement to 118,813 sq km of sea area…
- 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:
Harper et al.
This chapter discusses the applications and challenges for glass and carbon fibre composites in marine renewable energy devices. It uses a tidal turbine blade as a case study, describing the nature of the operating environment and resulting loads, the structural design process, material selection, manufacturing techniques and structural health monitoring. The chapter also discusses ongoing…
- 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:
Dhanak et al.
Marine hydrokinetic energy includes that due to waves, tides, and ocean currents. The characteristics of these forms of energy and the assessment of their potential for extraction are discussed briefly herein. Detailed consideration is given to the assessment of ocean current energy, including a case study of the resource assessment of the Florida Current. Estimates of global and local open…
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