Results 191 to 200 of about 2,385 (233)
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Investigation of wave–current interaction for a tidal current turbine
Energy, 2021Abstract Due to linear wave theory limitations, higher-order theories have been coupled with the Blade Element Momentum (BEM) model to predict the time behavior of the dynamic loading on the combined wave–current field. Second-order, third-order approximations and fifth-order stokes theory have been used to check their effects on the predicted wave ...
Saeed A. El-Shahat, Guojun Li, Lei Fu
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Active control for tidal current turbine arrays [PDF]
The aim of this study is to propose an array controller to demonstrate its potential in reducing the costs of tidal current energy. Tidal power is a promising renewable energy source capable of meeting the UK’s electricity needs while addressing the drive for carbon neutrality.
Zhang, Yidan
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Modeling tidal turbine farm with vertical axis tidal current turbines
2007 IEEE International Conference on Systems, Man and Cybernetics, 2007A tidal current turbine is a device for harnessing energy from marine currents, and functions in a manner similar to a wind turbine. A group of tidal current turbines distributed in a site in ocean is called a tidal turbine farm. Among all tidal current energy extraction schemes, turbine farm is regarded as among the most promising turbine ...
Ye Li 0009 +2 more
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Analytical wake model of tidal current turbine
Energy, 2015Prediction of the wake structure is important to understand the lee flow of a tidal current turbine. The proposed analytical wake model consists of several equations derived from the theoretical works of a ship propeller jet. Axial momentum theory was used to predict the minimum velocity at the immediate plane of the lee wake and followed by the ...
Lam, W.H., Chen, L., Hashim, Roslan
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Design of a horizontal axis tidal current turbine
Applied Energy, 2013Abstract Pacific Island Countries (PICs) have a huge renewable energy potential to meet their energy needs. Limited resources are available on land; however, large amount of ocean energy is available and can be exploited for power generation. PICs have more sea-area than land-area.
Jai N. Goundar, M. Rafiuddin Ahmed
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Turbines for modular tidal current energy converters
Renewable Energy, 2019Abstract The vast potential of ocean energies is of increasing interest. Harnessing marine currents driven by the tidal cycle have triggered the development of various power conversion systems. However, the comparably high levelized cost of electricity is still the main hindrance for a faster market penetration.
Nicholas Kaufmann +2 more
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An effective framework for wake predictions of tidal-current turbines
Ocean Engineering, 2021Abstract Deployment of tidal array farms is the next stage of tidal energy development which concentrates on the capture of the enormous energy. Characterization into the wake of tidal turbine aids in determining the tidal farm layout and energy yields. This paper develops a framework that employs the Computational Fluid Dynamics (CFD) simulation and
Long Chen +5 more
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Tidal Current Turbine, Wind Turbine and Their Dynamic Modelling
2014Wind and tidal current are of the most common energy resources for generating electricity in the near future because of the oil problems (crises and pollution). Within that frame, wind and tidal current energies are surging to the fore. The dynamic model of the offshore wind and tidal current is very important topic for dealing with these renewable ...
Hamed H. H. Aly, M. E. El-Hawary
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Wake Modeling of Tidal Current Turbine Array
2019 International Conference on Power Generation Systems and Renewable Energy Technologies (PGSRET), 2019This paper presents the results of a Computational Fluid Dynamics (CFD) model of a two rotors operating in close proximity. The main purpose was to obtain a validated CFD model of scaled twin rotor laboratory turbine and to model how the wake of these two rotors will affect the performance of individual and collective turbines in future array.
Sakhi Jan +3 more
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Overall Efficiency of Ducted tidal current turbines
OCEANS 2010 MTS/IEEE SEATTLE, 2010Computational fluid dynamics (CFD) simulations have been completed to characterize the efficiency of tidal turbines. Efficiency is taken as the ratio of power production (i.e. useful electricity) to total power lost from the upstream incident flow energy. Many tidal turbine developers are considering ducted designs which accelerate the flow through the
M Shives, C Crawford
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