scholarly journals Resource Assessment of Tidal Stream Power in Pakiputan Strait, Davao Gulf, Philippines

2021 ◽  
Vol 11 (3) ◽  
pp. 7233-7239
Author(s):  
E. V. Palconit ◽  
J . R. Villanueva ◽  
N. J. Enano ◽  
M. J. Buhali ◽  
A. C. Mascariñas ◽  
...  
Keyword(s):  
Energy Resource ◽  
Acoustic Doppler Current Profiler ◽  
Tidal Energy ◽  
Resource Assessment ◽  
The Philippines ◽  
Dynamics Modeling ◽  
Stream Power ◽  
Marine Energy ◽  
Current Profiler ◽  
Energy Conversion Systems

During the last years, there are ongoing efforts on the development of tidal energy conversion systems in the Philippines. This study conducts tidal energy resource assessment in the Pakiputan Strait following a methodology outlined as stage 2a tidal resource assessment published by the European Marine Energy Centre (EMEC). The study assessed the preliminary results of the tidal velocities at Pakiputan Strait with a mean spring peak velocity (Vmsp) of 1.7m/s at 3m from the water surface from 15 days of continuous data collection using a seabed-mounted acoustic Doppler current profiler. This corresponded to an estimated Annual Energy Production (AEP) of 1350kWh/y for 1m2 of capture area of the generic device. Sensitivity analysis showed that the spatial distribution of hydrodynamic model results does not vary significantly with variations in certain input parameters. It further showed that a 10% decrease in the nominal value of Vmsp on-site led to a 15% decrease in the nominal value of AEP, while a 10% increase in the nominal value of Vmsp led to a 30% increase in the nominal value of AEP, assuming that the considered Vmsp still corresponded to the velocity distribution from observations. A static survey and the use of computational fluid dynamics modeling are recommended to further enhance the analysis of the study.

Marine Energy Resource Assessment for Orkney and Pentland Waters With a Coupled Wave and Tidal Flow Model

2014 ◽  
Author(s):  
Vengatesan Venugopal ◽  
Reddy Nemalidinne
Keyword(s):  
Flow Model ◽  
Tidal Flow ◽  
Energy Resource ◽  
Coupled Model ◽  
Resource Assessment ◽  
Orkney Islands ◽  
Marine Energy ◽  
Current Profiler ◽  
Adcp Measurements ◽  
Coupled Wave

Some preliminary results obtained from a coupled wave and 3D tidal flow numerical model, applied to the Orkney and Pentland waters in the Scottish region of the United Kingdom, are reported in this paper. The coupled wave and flow model was applied to the Orkney Islands comprising a domain of 1.25°W – 5°W and 58.25° N – 59.75°N. The model was run by boundary inputs of wind and water level extracted from European Centre for Medium Range Weather Forecasts (ECMWF) and Danish Hydraulic Institute’s (DHI) global tidal model respectively. The model has been calibrated and validated with wave buoy and ADCP (Acoustic Doppler and Current Profiler) measurements. The depth-wise current velocity components predicted by the model were compared with ADCP measurements for three sites in the Pentland Firth. The results indicated that the coupled model worked well and the tidal current velocities from the model correlated well with ADCP measurements at different depths.

scholarly journals Modeling Assessment of Tidal Energy Extraction in the Western Passage

2020 ◽  
Vol 8 (6) ◽  
pp. 411
Author(s):  
Zhaoqing Yang ◽  
Taiping Wang ◽  
Ziyu Xiao ◽  
Levi Kilcher ◽  
Kevin Haas ◽  
...  
Keyword(s):  
Cross Sections ◽  
Numerical Models ◽  
Three Dimensional ◽  
Energy Resource ◽  
Field Measurements ◽  
Tidal Energy ◽  
Resource Assessment ◽  
Ocean Model ◽  
Energy Extraction ◽  
Technical Specifications

Numerical models have been widely used for the resource characterization and assessment of tidal instream energy. The accurate assessment of tidal stream energy resources at a feasibility or project-design scale requires detailed hydrodynamic model simulations or high-quality field measurements. This study applied a three-dimensional finite-volume community ocean model (FVCOM) to simulate the tidal hydrodynamics in the Passamaquoddy–Cobscook Bay archipelago, with a focus on the Western Passage, to assist tidal energy resource assessment. IEC Technical specifications were considered in the model configurations and simulations. The model was calibrated and validated with field measurements. Energy fluxes and power densities along selected cross sections were calculated to evaluate the feasibility of the tidal energy development at several hotspots that feature strong currents. When taking both the high current speed and water depth into account, the model results showed that the Western Passage has great potential for the deployment of tidal energy farms. The maximum extractable power in the Western Passage was estimated using the Garrett and Cummins method. Different criteria and methods recommended by the IEC for resource characterization were evaluated and discussed using a sensitivity analysis of energy extraction for a hypothetical tidal turbine farm in the Western Passage.

scholarly journals Numerical modelling of hydrodynamics and tidal energy extraction in the Alderney Race: a review

2020 ◽  
Vol 378 (2178) ◽  
pp. 20190498
Author(s):  
Jérôme Thiébot ◽  
D. S. Coles ◽  
Anne-Claire Bennis ◽  
Nicolas Guillou ◽  
Simon Neill ◽  
...  
Keyword(s):  
Numerical Modelling ◽  
Three Dimensional ◽  
Energy Resource ◽  
Tidal Energy ◽  
Resource Assessment ◽  
Spatial Modelling ◽  
Optimization Techniques ◽  
Energy Extraction ◽  
Model Case ◽  
Eddy Simulation

The tides are a predictable, renewable, source of energy that, if harnessed, can provide significant levels of electricity generation. The Alderney Race (AR), with current speeds that exceed 5 m s −1 during spring tides, is one of the most concentrated regions of tidal energy in the world, with the upper-bound resource estimated at 5.1 GW. Owing to its significance, the AR is frequently used for model case studies of tidal energy conversion, and here we review these model applications and outcomes. We examine a range of temporal and spatial modelling scales, from regional models applied to resource assessment and characterization, to more detailed models that include energy extraction and array optimization. We also examine a range of physical processes that influence the tidal energy resource, including the role of waves and turbulence in tidal energy resource assessment and loadings on turbines. The review discusses model validation, and covers a range of numerical modelling approaches, from two-dimensional to three-dimensional tidal models, two-way coupled wave-tide models, Large Eddy Simulation (LES) models, and the application of optimization techniques. The review contains guidance on model approaches and sources of data that can be used for future studies of the AR, or translated to other tidal energy regions. This article is part of the theme issue ‘New insights on tidal dynamics and tidal energy harvesting in the Alderney Race’.

scholarly journals Current Patterns in the Inner Sound (Pentland Firth) from Underway ADCP Data*

2013 ◽  
Vol 30 (1) ◽  
pp. 96-111 ◽  
Author(s):  
Lonneke Goddijn-Murphy ◽  
David K. Woolf ◽  
Matthew C. Easton
Keyword(s):  
Acoustic Doppler Current Profiler ◽  
Tidal Energy ◽  
Current Data ◽  
Northern Coast ◽  
Orkney Islands ◽  
The North ◽  
Tidal Changes ◽  
Current Profiler ◽  
Tidal Stream ◽  
Tidal Streams

AbstractNumerous acoustic Doppler current profiler (ADCP) surveys were performed in the Inner Sound of the Pentland Firth, a channel between the Orkney Islands and the northern coast of Scotland connecting the Atlantic Ocean to the west and the North Sea to the east. The Pentland Firth has the highest tidal streams of the British Isles, and one of the highest that can be found around the globe. Here, the tidal energy industry is in its demonstration phase, but not many real current measurements are in the public domain. The authors present real current data, measured during different phases of the tidal cycle, using a vessel-mounted ADCP. The tidal changes can be rapid, and because the underway measurements take time, the apparent spatial patterns are affected by temporal variation. A method is described that estimated and corrected this temporal distortion using a hydrodynamic model. It appeared that ebb and flood streams did not fully overlap, and that the tidal streams were more complicated, turbulent, and variable than existing models suggest. The data were analyzed for characteristics pertinent to practical tidal stream energy exploitation, and two favorable sites in the Inner Sound are identified. All original current data are available from the British Oceanographic Data Centre (BODC).

Wave and tidal energy resource assessment in Uruguayan shelf seas

2017 ◽  
Vol 114 ◽  
pp. 18-31 ◽  
Author(s):  
Rodrigo Alonso ◽  
Michelle Jackson ◽  
Pablo Santoro ◽  
Mónica Fossati ◽  
Sebastián Solari ◽  
...  
Keyword(s):  
Energy Resource ◽  
Tidal Energy ◽  
Resource Assessment ◽  
Shelf Seas

Effects of CFD parameter variation on Tidal Energy Resource Assessment

2012 ◽  
Author(s):  
Michael Lochinvar Sim Abundo ◽  
Chew Kok Hon ◽  
Martin Koh Wei Xiang ◽  
Oh Boon Kiat ◽  
Wilbur Tan Hong Huat
Keyword(s):  
Energy Resource ◽  
Tidal Energy ◽  
Resource Assessment ◽  
Parameter Variation

scholarly journals Dispatchability, Energy Security, and Reduced Capital Cost in Tidal-Wind and Tidal-Solar Energy Farms

Energies ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 8504
Author(s):  
Peter Osman ◽  
Jennifer A. Hayward ◽  
Irene Penesis ◽  
Philip Marsh ◽  
Mark A. Hemer ◽  
...  
Keyword(s):  
Case Studies ◽  
Energy Content ◽  
Capital Expenditure ◽  
Energy Resource ◽  
Tidal Energy ◽  
Solar Pv ◽  
Stream Power ◽  
Low Velocity ◽  
Power Generators ◽  
Tidal Stream

The global tidal energy resource for electricity generation is small, and converting tidal kinetic energy to electricity is expensive compared to solar-photovoltaic or land-based wind turbine generators. However, as the renewable energy content in electricity supplies grows, the need to stabilise these supplies increases. This paper describes tidal energy’s potential to reduce intermittency and variability in electricity supplied from solar and wind power farms while lowering the capital expenditure needed to improve dispatchability. The paper provides a model and hypothetical case studies to demonstrate how sharing energy storage between tidal stream power generators and wind or solar power generators can mitigate the level, frequency, and duration of power loss from wind or solar PV farms. The improvements in dispatchability use tidal energy’s innate regularity and take account of tidal asymmetry and extended duration low-velocity neap tides. The case studies are based on a national assessment of Australian tidal energy resources carried out from 2018 to 2021.

scholarly journals Marine Energy Resource Assessment at Reconnaissance to Feasibility Study Stages

2016 ◽  
Vol 23 (0) ◽  
pp. 189-198 ◽  
Author(s):  
Takuji Waseda ◽  
Adrean Webb ◽  
Keiji Kiyomatsu ◽  
Wataru Fujimoto ◽  
Yasumasa Miyazasa ◽  
...  
Keyword(s):  
Feasibility Study ◽  
Energy Resource ◽  
Resource Assessment ◽  
Marine Energy

EquiMar: The Development of Protocols for the Equitable Evaluation of Marine Energy Systems

2009 ◽  
Author(s):  
George H. Smith ◽  
Claudio Bittencourt ◽  
David Ingram
Keyword(s):  
Energy Systems ◽  
Economic Assessment ◽  
Tidal Energy ◽  
Resource Assessment ◽  
International Standards ◽  
The European Union ◽  
Ocean Energy ◽  
Playing Field ◽  
Marine Energy ◽  
High Level

This paper describes a major collaborative project funded through the European Union which seeks to accelerate the adoption of ocean energy systems through providing a rational suite of protocols that will: (i) help to match technology and scale of deployment to site specific considerations; (ii) define acceptable methodologies to evaluate the environmental consequence of deployment; (iii) develop techniques for equitable comparison of the economic potential; for the deployment of small to medium arrays. EquiMar involves 23 European partners, including scientists, engineers, ecologists and developers. Funded through the European Commission 7th Framework Programme [1] (grant agreement 213380), this €5.5 million project aims to produce a suite of protocols that will enable a broad range of stakeholders to judge the variety of technologies in wave and tidal energy on a level playing field. The protocols will reflect the entire development cycle of a marine device: resource assessment and site selection; fundamental engineering design; scaling up and deployment; environmental impact and economic assessment. The project has now been running for 12 months. This paper reviews the intended work over the three year project, but focuses on the development of “high level” documents that will describe the aims and remit of the individual protocols. The high level protocols were conceived to meet two fundamental requirements. EquiMar is an ambitious project in terms of both scope and number of collaborators. There is a need to maintain consistency and clarity as each protocol/ guideline is developed. The high level protocols will serve as a template for the detailed specifications, clarifying content, identifying gaps and links within the overall work and finally will help to maintain focus on the final goals. Externally the high level documents will provide a mechanism for engagement of the many stakeholders. Early feedback on the direction and coverage of the protocols is fundamental to achieving, where practica, a consensus from the diverse ocean energy community. Based on the practices of an international Certifying Agency (DNV) it is intended that the protocols will be fit for guidance and incorporation into proposed international standards. This paper aims to increase dissemination and provoke comment from the International marine community in order that that the final documents will be fit for purpose by reflecting the considered opinion of as wide a body of relevant contributors as is possible, and act as a catalyst to help deliver the potential for marine renewable energy on the international stage.

scholarly journals The Alderney Race: general hydrodynamic and particular features

2020 ◽  
Vol 378 (2178) ◽  
pp. 20190492 ◽  
Author(s):  
Pascal Bailly du Bois ◽  
Franck Dumas ◽  
Mehdi Morillon ◽  
Lucille Furgerot ◽  
Claire Voiseux ◽  
...  
Keyword(s):  
Resonance Effect ◽  
Acoustic Doppler Current Profiler ◽  
Tidal Energy ◽  
Tidal Range ◽  
Hydrodynamic Process ◽  
Sea Levels ◽  
Area Of Interest ◽  
Sea Bottom ◽  
Current Profiler

This study presents an overview of the main hydrodynamic features of the Alderney Race strait based on in situ measurements and two-dimensional hydrodynamic model simulations. The strait encompasses a large amplitude of tidal properties (tidal range and tidal wave propagation) and particularly strong currents exceeding 5 m s −1 with associated counter currents and gyres. Variations in depth, sea bottom roughness, coastal topography and current orientation around the La Hague Cape provide access to a large variety of original hydrodynamic regimes. Some are revealed as locations with a 0.4 m drop in the mean sea level associated with strong average currents. A resonance effect associated with the offshore currents can also be observed close to the coasts. The ‘St Martin whistle’ occurs in a bay whose gyre centre oscillates with a reversal of the measured current every 5–7 min. The Alderney Race represents a particular area of interest for coastal hydrodynamic studies. The available in situ measurement datasets are rich with recordings of: sea levels; acoustic Doppler current profiler current profiles; surface radar currents; waves; dye experiments; surface and in-depth dissolved tracer surveys. Combined with hydrodynamic models, the complexity of this area can be further understood and knowledge of the hydrodynamic process and forcing parameters can be refined, which can be applied to other coastal areas. This article is part of the theme issue ‘New insights on tidal dynamics and tidal energy harvesting in the Alderney Race’.

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