Tidal Energy Technology

O'Doherty, Timothy; O'Doherty, Daphne Maria; Mason-Jones, Allan

doi:10.1002/9781119014492.ch4

Cited by 7 publications

(6 citation statements)

References 17 publications

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“…Numerical models have predicted that waves will enhance local turbulence and fluid mixing behind the turbine, ultimately penetrating through the wake and influencing recovery [24]. If wave interaction is expected then an appropriately incorporated free surface is needed in any computational fluid dynamics (CFD) model [25].…”

Section: ) Wavesmentioning

confidence: 99%

Review of tidal turbine wake modelling methods

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Macleod

Wills³

2020

Int. J. Mar. Ene.

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Enabling Future Arrays in Tidal (EnFAIT) is an EU Horizon 2020 flagship tidal energy project. It aims to demonstrate the development, operation and decommissioning of the world’s largest tidal array (six turbines), over a five-year period, to prove a cost reduction pathway for tidal energy and confirm that it can be cost competitive with other forms of renewable energy. To determine the optimal site layout and spacing between turbines within a tidal array, it is essential to accurately characterise tidal turbine wakes and their effects. This paper presents a state-of-the-art review of tidal turbine wake modelling methods, with an overview of the relevant fundamental theories. Numerical and physical modelling research completed by both academia and industry are considered to provide an overview of the contemporary understanding in this area. The scalability of single device modelling techniques to an array situation is discussed, particularly with respect to wake interactions.

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Section: ) Wavesmentioning

confidence: 99%

Review of tidal turbine wake modelling methods

Jump

Macleod

Wills³

2020

Int. J. Mar. Ene.

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“…For other sites with highly sheared flow conditions, a profiled flow model would be more appropriate [40].…”

Section: ) Deep Water Wave Conditionsmentioning

confidence: 99%

Development of a wave-current numerical model using Stokes 2nd Order Theory

2019

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The optimisation of a Numerical Wave Tank is proposed to accurately model the sub surface conditions generated by regular waves superimposed on a uniform current velocity. ANSYS CFX 18.0 was used to develop a homogenous multiphase model with volume fractions to define the different phase regions. By applying CFX Expression Language at the inlet of the model, Stokes 2nd Order Theory was used to define the upstream wave and current characteristics. Horizontal and vertical velocity components, as well as surface elevation of the numerical model were compared against theoretical and experimental wave data for 3 different wave characteristics in 2 different water depths. The comparison highlighted the numerical homogeneity between the theoretical and experimental data. Therefore, this study has shown that the modelling procedure used can accurately replicate experimental testing facility flow conditions, providing a potential substitute to experimental flume or tank testing.

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“…Thus, there has been a considerable global research effort that has focused on developing an alternative energy source that is not only clean but also abundant. There are multiple promising candidates for renewable energy including solar, wind, tidal, geothermal, and hydrogen, each with its own set of benefits and drawbacks [ 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 ]. Solar energy, for example, is a promising candidate as energy from the sun is the most abundant energy source we have currently.…”

Section: Introductionmentioning

confidence: 99%

“…Opponents of wind energy point out that the development of wind farms has led to an increase in noise pollution and that wind turbines have disrupted the flight patterns of some bird species resulting in deaths from collisions [ 8 ]. Tidal energy is a relatively new renewable energy source that is promising due to it being one of the most predictable forms of renewable energy [ 9 ]. The main concern with tidal energy is that there have not yet been enough studies on the environmental impacts.…”

Section: Introductionmentioning

confidence: 99%

“…The main concern with tidal energy is that there have not yet been enough studies on the environmental impacts. There are concerns over the impacts the construction of tidal energy devices will have on local species, as well as economic concerns over how these structures will affect shipping routes [ 9 ]. Geothermal energy is another energy source that is highly consistent like tidal energy; however, the main drawbacks of geothermal energy are inefficiency compared to other renewable energy sources and a high initial cost to implement [ 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of Platinum Nanoparticles Supported on Fused Nanosized Carbon Spheres Derived from Sustainable Source for Application in a Hydrogen Generation Reaction

2023

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The dwindling supply of fossil fuels has prompted the search for an alternative energy source that could effectively replace them. Potential renewable energy sources such as solar, wind, tidal, and geothermal are all promising but each has its own drawbacks. Hydrogen gas on the other hand can be combusted to produce energy with only water as a byproduct and can be steadily generated via the aqueous media hydrolysis reaction of Sodium Borohydride (NaBH4). This study successfully synthesized fused carbon spheres derived from sugar and decorated them with platinum nanoparticles to form a novel composite material (PtFCS) for catalyzing this reaction. The platinum nanoparticles were produced by reducing chloroplatinic acid in a solution with sodium borohydride and using sodium citrate as a capping agent for the nanoparticles. Transmission electron microscopy (TEM), Energy-dispersive X-ray spectroscopy (EDS), Fourier-transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD) were used to characterize and determine the size and shape of the Pt nanoparticles (PtNPs) and fused carbon spheres. TEM was able to determine the average size of the fused carbon spheres to be 200 nm and the average size for the PtNPs to be 2–3 nm. The PtFCS composite was tested for its ability to catalyze the hydrolysis of NaBH4 under various reaction conditions including various solution pH, various temperatures, and various dosages of sodium borohydride. The catalyst was found to perform the best under acidic solution conditions (pH 6), producing hydrogen at a rate of 0.0438 mL/mgcat·min. The catalyst was determined to have an activation energy of 53.0 kJ/mol and could be used multiple times in succession with no loss in the volume of hydrogen produced. This sugar-derived composite catalyst shows promise and could be implemented as a sustainable catalyst for the generation of hydrogen fuel.

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Tidal Energy Technology

Cited by 7 publications

References 17 publications

Review of tidal turbine wake modelling methods

Review of tidal turbine wake modelling methods

Development of a wave-current numerical model using Stokes 2nd Order Theory

Synthesis of Platinum Nanoparticles Supported on Fused Nanosized Carbon Spheres Derived from Sustainable Source for Application in a Hydrogen Generation Reaction

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