Racing the waves [wave and tidal energy technology]

2004 ◽  
Vol 18 (3) ◽  
pp. 24 ◽  
Author(s):  
J. Wood
Keyword(s):  
Tidal Energy ◽  
Energy Technology ◽  
The Waves

Tidal Energy Technology

2018 ◽  
pp. 105-150
Author(s):  
Tim O'Doherty ◽  
Daphne M. O'Doherty ◽  
Allan Mason-Jones
Keyword(s):  
Tidal Energy ◽  
Energy Technology

scholarly journals Potential of tidal power plants with least square method on Toaya Beach

2022 ◽  
Vol 1212 (1) ◽  
pp. 012038
Author(s):  
H Azikin ◽  
Nurhidayat ◽  
E Affandy ◽  
S S Syahruddin
Keyword(s):  
Water Level ◽  
Alternative Energy ◽  
Power Plants ◽  
Electrical Power ◽  
Least Square Method ◽  
Tidal Energy ◽  
Least Square ◽  
Tidal Power ◽  
Height Difference ◽  
The Waves

Abstract The use of energy, especially electrical power, is needed by the wider community— lots of alternative energy from nature, especially in Indonesia that can be utilized to produce electricity. One of the newest alternative examples is the energy produced by tides. Tidal energy is a type of renewable energy that is relatively more predictable in number. One method that can process the waves is the Least Square Method. Where the results of data processing using this method can be known based on tidal observations for 15 days on Toaya Beach located in Donggala Regency, Central Sulawesi, the types of tidal types that occur based on the results of Formzahl’s count is 0.357 that the tidal types that occur are varied types leaning to double daily, with a Root Mean Square Error (RMSE) of 0.028, which means that the difference between predictive results and observational data is accurate. Then also obtained the value of the design water level elevation that is the highest high water level (HHWL) is 2.7 meters, and the lowest low water level (LLWL) is -0.3 meters with a height difference is 3.0 meters. So with the high height difference, the total energy generated by two times a day with a sea area of 9 km2 which is capable of producing energy movement from seawater can be calculated the potential energy generated from the waves of Toaya Beach, which is 5,53 MW.

scholarly journals Reassessment of tidal energy potential in India and a decision-making tool for tidal energy technology selection

2017 ◽  
Vol 8 (2) ◽  
pp. 85-97 ◽  
Author(s):  
K Murali ◽  
V Sundar
Keyword(s):  
Energy Conversion ◽  
Clean Energy ◽  
Tidal Energy ◽  
Technology Selection ◽  
Tidal Range ◽  
Energy Technology ◽  
Ocean Energy ◽  
Tidal Power ◽  
Energy Potential ◽  
Tidal Stream

Oceans have significant renewable energy options to provide environmental friendly and clean energy. Technology for ocean energy systems and the feasibility for extraction of the same is an important area on which research is being focused worldwide. This article covers a detailed review of available tidal energy conversion technologies and case studies, with specific focus on tidal power potential in India. The proven option for tidal energy conversion is barraging. Recently, open-type turbine (usually known as tidal stream turbines) has been studied by several researchers and pilot demonstrations have been made. While conventional turbines of 10–20 MW rating are used in barrages, the application of tidal stream turbines of 0.5–2.0 MW has been demonstrated in water depths between 40 and 60 m. A new scale is proposed for categorizing the tidal energy potential in terms of tidal velocity and tidal range which could be used to categorize the potential sites and their ranking. A new systematic approach proposed for the assessment of tidal energy conversion potential can facilitate the suitability of either tidal stream energy or tidal barrage for a location. Within this, one could also decide the site could be developed as a major project or minor project. Therefore, the present work will be useful for engineers and decision makers in technology selection investment potential identification.

A techno-economic analysis of tidal energy technology

2013 ◽  
Vol 49 ◽  
pp. 101-106 ◽  
Author(s):  
C.M. Johnstone ◽  
D. Pratt ◽  
J.A. Clarke ◽  
A.D. Grant
Keyword(s):  
Economic Analysis ◽  
Tidal Energy ◽  
Energy Technology

scholarly journals Internal Tidal Modal Ray Refraction and Energy Ducting in Baroclinic Gulf Stream Currents

2018 ◽  
Vol 48 (9) ◽  
pp. 1969-1993 ◽  
Author(s):  
Timothy F. Duda ◽  
Ying-Tsong Lin ◽  
Maarten Buijsman ◽  
Arthur E. Newhall
Keyword(s):  
Internal Wave ◽  
Gulf Stream ◽  
Gulf Of Maine ◽  
Tidal Energy ◽  
Georges Bank ◽  
Primary Analysis ◽  
Model Simulations ◽  
Tidal Energy Flux ◽  
Baroclinic Currents ◽  
The Waves

AbstractUpstream mean semidiurnal internal tidal energy flux has been found in the Gulf Stream in hydrodynamical model simulations of the Atlantic Ocean. A major source of the energy in the simulations is the south edge of Georges Bank, where strong and resonant Gulf of Maine tidal currents are found. An explanation of the flux pattern within the Gulf Stream is that internal wave modal rays can be strongly redirected by baroclinic currents and even trapped (ducted) by current jets that feature strong velocities above the thermocline that are directed counter to the modal wavenumber vector (i.e., when the waves travel upstream). This ducting behavior is analyzed and explained here with ray-based wave propagation studies for internal wave modes with anisotropic wavenumbers, as occur in mesoscale background flow fields. Two primary analysis tools are introduced and then used to analyze the strong refraction and ducting: the generalized Jones equation governing modal properties and ray equations that are suitable for studying waves with anisotropic wavenumbers.

scholarly journals Current trends and prospects of tidal energy technology

2020 ◽  
Author(s):  
M. S. Chowdhury ◽  
Kazi Sajedur Rahman ◽  
Vidhya Selvanathan ◽  
Narissara Nuthammachot ◽  
Montri Suklueng ◽  
...  
Keyword(s):  
Tidal Energy ◽  
Energy Technology ◽  
Current Trends

scholarly journals Internal wave generation by oscillation of a sphere, with application to internal tides

2010 ◽  
Vol 666 ◽  
pp. 308-357 ◽  
Author(s):  
B. VOISIN ◽  
E. V. ERMANYUK ◽  
J.-B. FLÓR
Keyword(s):  
Wave Amplitude ◽  
Near Field ◽  
Oscillation Amplitude ◽  
Tidal Flow ◽  
Three Dimensional ◽  
Tidal Energy ◽  
Internal Gravity Waves ◽  
Internal Tides ◽  
Correlation Technique ◽  
The Waves

A joint theoretical and experimental study is performed on the generation of internal gravity waves by an oscillating sphere, as a paradigm of the generation of internal tides by barotropic tidal flow over three-dimensional supercritical topography. The theory is linear and three-dimensional, applies both near and far from the sphere, and takes into account viscosity and the unsteadiness arising from the interference with transients generated at the start-up. The waves propagate in conical beams, evolving with distance from a bimodal to unimodal wave profile. In the near field, the profile is asymmetric with its major peak towards the axis of the cones. The experiments involve horizontal oscillations and develop a cross-correlation technique for the measurement of the deformation of fluorescent dye planes to sub-pixel accuracy. At an oscillation amplitude of one fifth of the radius of the sphere, the waves are linear and the agreement between experiment and theory is excellent. As the amplitude increases to half the radius, nonlinear effects cause the wave amplitude to saturate at a value that is 20% lower than its linear estimate. Application of the theory to the conversion rate of barotropic tidal energy into internal tides confirms the expected scaling for flat topography, and shows its transformation for hemispherical topography. In the ocean, viscous and unsteady effects have an essentially local role, in keeping the wave amplitude finite at the edges of the beams, and otherwise dissipate energy on such large distances that they hardly induce any decay.

The Waves

1986 ◽  
Author(s):  
Virginia Woolf ◽  
Warner
Keyword(s):  
The Waves
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