Relevant bibliographies by topics / Tidal renewable energy

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Tidal renewable energy'

Author: Grafiati
Published: 4 June 2021
Last updated: 4 February 2022

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Journal articles on the topic "Tidal renewable energy"

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Novico, Franto, Evi Hadrijantie Sudjono, Andi Egon, David Menier, Manoj Methew, and Munawir Bintang Pratama. "Tidal Current Energy Resources Assessment in the Patinti Strait, Indonesia." International Journal of Renewable Energy Development 10, no. 3 (February 24, 2021): 517–25. http://dx.doi.org/10.14710/ijred.2021.35003.

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Indonesia is currently intensively developing its renewable energy resource and targets at least 23% by 2025. As an archipelago country, Indonesia has the potential to benefit from its abundant renewable energy resources from its offshore regions. However, the short tidal range of mixed semi-diurnal and the suitable tidal turbine capacity may hinder marine renewable energy development in Indonesian waters. This paper presents higher-order hydrodynamic numerical models to provide spatial information for tidal current resource assessment of the Patinti Strait. The present study applied the hydrographic and oceanographic method to produce input of the numerical model. Based on the selected simulation analysis, the highest current speed could be identified around Sabatang and Saleh Kecil Island with up to 2.5 m/s in P1 and 1.7 m/s in P4. Besides, the operational hours for the two observation points are 69% and 74.5%, respectively. The results indicate that this location is of prime interest for tidal turbine implementation as an energy source, for medium capacity (300 kW) and high capacity (1 MW).
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Nicholls-Lee, R. F., and S. R. Turnock. "Tidal energy extraction: renewable, sustainable and predictable." Science Progress 91, no. 1 (March 1, 2008): 81–111. http://dx.doi.org/10.3184/003685008x285582.

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Sheehan, Emma V., Sarah C. Gall, Sophie L. Cousens, and Martin J. Attrill. "Epibenthic Assessment of a Renewable Tidal Energy Site." Scientific World Journal 2013 (2013): 1–8. http://dx.doi.org/10.1155/2013/906180.

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Concern over global climate change as a result of fossil fuel use has resulted in energy production from renewable sources. Marine renewable energy devices provide clean electricity but can also cause physical disturbance to the local environment. There is a considerable paucity of ecological data at potential marine renewable energy sites that is needed to assess potential future impacts and allow optimal siting of devices. Here, we provide a baseline benthic survey for the Big Russel in Guernsey, UK, a potential site for tidal energy development. To assess the suitability of proposed sites for marine renewable energy in the Big Russel and to identify potential control sites, we compared species assemblages and habitat types. This baseline survey can be used to select control habitats to compare and monitor the benthic communities after installation of the device and contribute towards the optimal siting of any future installation.
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Soejianto, Eko, Khansa Hanifa Zahra, and Suci Nur Hidayah. "Tidal Energy Utilization of Larantuka Strait by Dual Tidal Turbines to Increase National Energy Resilience." Proceeding International Conference on Science and Engineering 2 (March 1, 2019): 73–77. http://dx.doi.org/10.14421/icse.v2.57.

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Currently, renewable energy can only support 5% of national energy needs. Meanwhile, in 2035 renewable energy targeted to sustain 14% of total national energy demand. The proper way for optimizing the renewable energy is needed to actualize the target. Tidal energy as one of the potentials that are still being developed and need more attention from the government. Tidal can be used for natural energy resource since it has zero emission, produce big energy, and has no impact to weather. Larantuka Strait located in Flores island, Nusa Tenggara Timur province can produce tidal velocity up to 2.859 m/s with water density as much as 1.025 gr/cc. In utilizing this energy, we use new innovation by using dual tidal turbines which placed at the foot of Palmerah Bridge. The construction of Palmerah Bridge is built both by the government of Flores Island and Adonara Island. Dual tidal turbines are more efficient than singl e turbine by reason of tidal that has passed through the first turbine can be used again for the second turbine. The using of the generator is meant to convert kinetic energy that produced by dual tidal turbines. To convert ocean currents into electrical energy optimally, it is necessary to plan turbine designs that are in accordance with the conditions of ocean currents and the surrounding environment such as current velocity, wind influences and so on. Horizontal-axis tidal turbine (HATTs) is one of the technologies that are being developed and tested in prototype form by several companies, an efficient blade design is very important for the success of the HATTs. The amount of turbine needs, in this case, is 15 turbines with each turbine’s length is 10 meters. The turbines installed in bridge’s column along 800 meters. Estimate electricity can be generated by the turbine is 1.48 Mega Watt (MW).
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Clery, D. "RENEWABLE ENERGY: U.K. Ponders World's Biggest Tidal Power Scheme." Science 320, no. 5883 (June 20, 2008): 1574. http://dx.doi.org/10.1126/science.320.5883.1574.

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Kusuma, C. "Tidal Flow Renewable Energy Potential In The Capalulu Strait." IOP Conference Series: Materials Science and Engineering 1052, no. 1 (January 1, 2021): 012028. http://dx.doi.org/10.1088/1757-899x/1052/1/012028.

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Abad, Mohammad Seydali Seyf, Jennifer A. Hayward, Saad Sayeef, Peter Osman, and Jin Ma. "Tidal Energy Hosting Capacity in Australia’s Future Energy Mix." Energies 14, no. 5 (March 8, 2021): 1479. http://dx.doi.org/10.3390/en14051479.

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This paper outlines a methodology to determine the amount of renewable energy that can be accommodated in a power system before adverse impacts such as over-voltage, over-loading and system instability occur. This value is commonly known as hosting capacity. This paper identifies when the transmission network local hosting capacity might be limited because of static and dynamic network limits. Thus, the proposed methodology can effectively be used in assessing new interconnection requests and provides an estimation of how much and where the new renewable generation can be located such that network upgrades are minimized. The proposed approach was developed as one of the components of the AUSTEn project, which was a three-year project to map Australia’s tidal energy resource in detail and to assess its economic feasibility and ability to contribute to the country’s energy needs. In order to demonstrate the effectiveness of the proposed approach, two wide area networks were developed in DIgSILENT PowerFactory based on actual Australian network data near two promising tidal resource sites. Then, the proposed approach was used to assess the local tidal hosting capacity. In addition, a complementary local hosting capacity analysis is provided to show the importance of future network upgrades on the locational hosting capaity.
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Ferro, Benoit Dal. "Wave and tidal energy." Refocus 7, no. 3 (May 2006): 46–48. http://dx.doi.org/10.1016/s1471-0846(06)70574-1.

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Haque, Mohammad Asadul, and Mst Sujata Khatun. "Tidal Energy: Perspective of Bangladesh." Journal of Bangladesh Academy of Sciences 41, no. 2 (January 29, 2018): 201–15. http://dx.doi.org/10.3329/jbas.v41i2.35498.

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Bangladesh is blessed by the nature with renewable resources that are used all over the world in a wide range but in our country it is limited. The country has vast ocean area with various power resources such as Wave energy, Ocean Thermal Energy Conversion (OTEC) and Tidal energy. In the Bay of Bengal, the tidal range and tidal stream speed indicate the potentiality of tidal power generation in Bangladesh. This paper describes various methods of utilizing tidal power to generate electricity and assess the tidal energy resources of three potential sites of Bangladesh. The tidal data recorded by the Department of Hydrography of The Chittagong Port Authority (CPA) and Bangladesh Inland Water Transport Authority (BIWTA) have been analyzed. This study clearly indicates the bright prospects of tidal power in Bangladesh.Journal of Bangladesh Academy of Sciences, Vol. 41, No. 2, 201-215, 2017
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Cheng, Xiao Qing, Xi Zhang, and Li Xin Yi. "A Review on the Development of Tidal Energy in China." Advanced Materials Research 953-954 (June 2014): 637–49. http://dx.doi.org/10.4028/www.scientific.net/amr.953-954.637.

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The global economic and social developments depend largely on fossil fuels nowadays. To cope with energy crisis and environment problems caused by consumption of fossil fuels, the renewable energy exploitation is an alternative path. As one kind of renewable ocean energy which can be applied into production, tidal energy is mainly utilized in electricity generation. China has abundant tidal energy resource, which mainly distribute in the southeast coastal areas where power supply is insufficient. China's tidal power generation started in 1958, and some experience and technologies have been accumulated from the long-time history of tidal power station construction and operation. At present, China’s tidal energy’s development and utilization are still in low level, and remain plagued by several challenges, such as high cost, and insufficiency of preferential policies and regulations. While, China's tidal power generation must be very promising in the foreseeable future, with a great deal of attention paid to the utilization of renewable energy and the perception of sustainable development.
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Dissertations / Theses on the topic "Tidal renewable energy"

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Muchala, Subhash. "Impact of tidal turbine support structures on realizable turbine farm power." Thesis, University of Oxford, 2017. http://ora.ox.ac.uk/objects/uuid:12db3e87-650b-4784-b68c-c81636e72118.

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This thesis discusses the importance of tidal turbine support structures through analytical and computational modelling. A head-driven analytical channel model was first developed to determine the sensitivity of the flow to the presence and type of support structures. It showed that there was a significant potential reduction in farm power output even when only considering approximate force coefficients for rotor and support structure. To confirm these findings, computational simulations were performed on a full-scale turbine to obtain more accurate force coefficients considering full rotor-support structure interactions. The flow interaction effects between the rotor and its support structure were studied using Computational Fluid Dynamics (CFD) for different support structure shapes for a range of tidal velocities including the power-capping zone. The integrated rotor force coefficients were higher in the presence of the cylindrical support structure than the elliptical support due to the higher opposing thrust from the cylinder in the channel redirecting the flow and increasing the flow velocity over the top half of the rotor. The presence of rotor caused a drop in the stream-wise forces on the support structure. The amplitude of the stream-wise sectional forces along the support structure height was lower in the case of an elliptical than a circular cylinder due to more streamlined shape of the ellipse. At device scale, the computational model was used to study the turbine performance in the power-capping zone by pitching the blades to feather. The influence of pitch-to- feather power-capping strategy was examined by studying the forces and angle of attack on the turbine blades, and the wake at three different blade pitch angles. Increasing blade pitch angle resulted in a significant drop in the average load on the blade. Also since the tidal channel flow has a shear in its velocity profile, the influence of shear on turbine performance was studied by comparing it to the same turbine in a uniform flow. The analytical channel flow model was used to investigate the characteristics of tidal stream energy extraction for large tidal farms deployed in tidal channels with specific focus on the limitations to realizable farm power due to turbine support structure drag and constraints on volume flow rate reduction. The force coefficients dataset from computational modelling was used to obtain a better estimate of the farm power output. Support structures were seen to contribute significantly to the overall resistive force in the channel and thus reduce the overall flow rates in the channel, leading to losses in realizable power. Over a wide range of channel characteristics, realistic levels of support structure drag lead to up to a 10% reduction in realizable power, and an associated reduction in the number of turbines that can be economically installed.
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Bruder, Brittany Lynn. "Assessment of hydrokinetic renewable energy devices and tidal energy potential at Rose Dhu Island, GA." Thesis, Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/41198.

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Current hydro-turbines aim to capture the immense energy available in tidal movements, however commonly applied technologies rely on principles more applicable in hydroelectric dams. Tidal stream currents, such as in Coastal Georgia, are not strong enough to make such turbines both efficient and economically viable. This research proposes a novel low-energy vortex shedding vertical axis turbine (VOSTURB) to combat the inefficiencies and challenges of hydro-turbines in low velocity free tidal streams. Some of the energy in tidal streams is extracted naturally from vortex shedding; as water streams past a bluff body, such as pier, low pressure vortices form alternatively on each side, inducing a rhythm of pressure differentials on the bluff body and anything in its wake. VOSTURB aims to capture this energy of the vortices by installing a hydrofoil subsequent to the bluff body. This foil, free to oscillate, translates the vortex energy into oscillatory motion, which can be converted into a form of potential energy. The presented research will act as a 'proof of concept.' It aims to assess such foil motion, or the ability of VOSTURB to capture vortex energy, and begin to assess the amount of tidal energy that can be theoretically harnessed. In this study a small scale model of VOSTURB, a cylindrical bluff body with a hammer shaped hydrofoil, was tested in a hydraulic flume for various mean flow speeds. Tangential accelerations of the foil's center of gravity were obtained through the use of an accelerometer. The acceleration data was analyzed utilizing Fourier analysis to determine the fundamental frequency of the wing oscillations. The available power to be harnessed from the oscillatory motion was then estimated utilizing this fundamental frequency. Ultimately it was found that the frequency of the VOSTURB foil oscillations corresponded highly with the theoretical frequency of vortex shedding for all moderate to high flow speeds. Low speeds were found to produce inconsistent and intermittent small oscillations. This signifies at moderate to high flow speeds, VOSTURB was able to transform some vortical energy into kinetic. The maximum average power obtained 8.4 mW corresponded to the highest flow velocity 0.27 m/s. Scaled to Rose Dhu prototype conditions this represented 50 W at a flow velocity of 0.95m/s, the maximum available at Rose Dhu. Although it was ascertained that VOSTURB could consistently capture some of the vortical energy; the percentage of which could not be calculated with certainty. Thus, the average kinetic power assessments of the foil were compared to the available power of the mean flow for each flow speed calculated by two methods: (1) over the foil's swept area; (2) the area of fluid displaced by the bluff body immediately in front of the foil. The maximum efficiency of the foil, found for the fastest flow speed was at 18% and 45% respectively. It was found that both average foil power, available flow power, and efficiency all decreased with a decrease in flow velocity. This study can serve as only a preliminary study for the effectiveness of VOSTURB as a hydro-turbine for tidal power. In the experiments, the foil was allowed to oscillate freely with little resistance. Future testing of VOSTURB needs to observe whether the vortex energy can overcome the resistive torque introduced by a generator to induce oscillatory motion as well as further optimize the foil design. While the testing in this project assesses the kinetic energy or power of the vortex shedding, this future testing will provide insight into the actual work that can actually be converted into potential energy or power. Complementing this research, both a Harmonic Analysis of Least Squares (HAMELS) and a Complex Empirical Orthogonal Function (CEOF) Analysis was conducted on available surface height and current velocity data separately from an available Regional Ocean Modeling System (ROMS) model of Coastal Georgia. Such analysis were conducted to observe spatial and temporal tidal patterns advantageous to a possible prototype installation of a tidal turbine such as VOSTURB. The more conventional HAMELS analysis, which isolates components of a signal with a certain frequency, identified temporal and spatial patterns attributed to tidal constituents. CEOF analysis, where major patterns of variance are identified not according to prescribed frequencies, was employed to identify any patterns possible not attributed to the tidal constituents. This study was also in part to observe whether the CEOF analysis could identify any patterns of tidal propagation that could not be resolved by the HAMELS analysis. The CEOF and HAMELS analysis of the surface height output produced very similar results: major modes of surface height variation due to the diurnal and semidiurnal tidal constituents propagating up the estuary. The CEOF results did not produce any additional information that could not be found through the HAMELS analysis of the constituents and presented such results in an arguably more convoluted manner. In addition, the surface height analysis provided no direct insight into areas more advantageous to tidal power. The CEOF analysis of the vector current velocity data however did provide some insight. The CEOF of the current data was able to isolate patterns of variance corresponding to the tidal constituents. However, the CEOF was also able to identify local 'hotspots' of high current magnitudes not resolved by HAMELS. These local areas of high current magnitudes, most likely due to changes in hydrodynamic conditions such as channel constrictions, are advantageous for tidal power applications. These general areas could serve as a starting point for the location selection process for a possible prototype installation of VOSTURB if the area was refined more. Ultimately for a prototype installation of VOSTURB, further experimentation and analysis is required for both the turbine design and placement, such as a power conversion methodology for the turbine and a more spatially resolute set of data to perform a CEOF analysis on. With these tasks completed, the prototype installation will be part of a larger effort between the Georgia Institute of Technology and the Girl Scouts of America to create completely sustainable "Eco-Village" on Rose Dhu Island, GA. With an extensive community outreach planned to educate the public, Rose Dhu, along with championing hydrokinetic energy, will serve as a paradigm for sustainable design and energy.
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Atwater, Joel. "Limitations on tidal-in-stream power generation in a strait." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/635.

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In the quest to reduce the release of carbon dioxide to limit the effects of global climate change, tidal-in-stream energy is being investigated as one of many possible sustainable means of generating electricity. In this scheme, turbines are placed in a tidal flow and kinetic energy is extracted. With the goal of producing maximum power, there is an ideal amount of resistance these turbines should provide; too little resistance will not a develop a sufficient pressure differential, while too much resistance will choke the flow. Tidal flow in a strait is driven by the difference in sea-level along the channel and is impeded by friction; the interplay between the driving and resistive forces determines the flow rate and thus the extractible power. The use of kinetic energy flux, previously employed as a metric for extractible power, is found to be unreliable as it does not account for the increased resistance the turbines provide in retarding the flow. The limits on extraction from a channel are dependant on the relationship between head loss and velocity. If head loss increases with the square of the velocity, a maximum of 38% of the total fluid power may be extracted; this maximum decreases to 25\% if head loss increases linearly with velocity. Using these values, the estimated power potential of BC's Inside Passage is 477MW, 13% of previous assessments. If a flow has the ability to divert through a parallel channel around the installed turbines, there are further limits on production. The magnitude of this diversion is a function of the relative resistance of impeded and diversion channels. As power extraction increases, the flow will slow from its natural rate. This reduction in velocity precipitously decreases the power density the flow, requiring additional turbine area per unit of power. As such, the infrastructure costs per watt may rise five to eight times as additional turbines are installed. This places significant economic limitations on utility-scale tidal energy production.
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Schluntz, Justine Oakley. "Tidal turbine array modelling." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:b342fda1-a311-4783-8249-9b1515e0ad62.

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Computational fluid dynamics (CFD) is used in this thesis to model wind and tidal stream turbines and to investigate tidal turbine fence performance. There are two primary objectives of this work. The first is to develop and validate an actuator line method for the simulation of wind and tidal turbines which applies the blade forces to the flow field without the need for a regularisation kernel. The second is to examine tidal fences using, in part, the newly developed actuator line method. A potential flow equivalence method for determining the relative velocity to the blade chord and flow angle at the rotor blades in the actuator line method is proposed and validated. Results for simulations using this method compare favourably with those from both experiments and alternative computational methods, although the present model’s results deviate from experimental results in the vicinity of the blade tips. A CFD-embedded blade element-momentum tool is used to design rotors for operation in infinitely wide tidal fences spanning a tidal channel. Rotors are designed for fences with several different blockage ratios, with those designed for high blockage flows having greater solidity than those designed for operation in fences with lower blockage. It is found that designing rotors for operational blockage conditions can significantly improve the power output achieved by a tidal fence. Improved power output for higher blockage conditions is achieved by the application of greater thrust to the flow. Actuator line simulations of short (up to 8 turbines) fences with varying intra-rotor spacing and number of rotors confirm that hydrodynamic performance of the rotors improves as the spacing is reduced and as rotors are added to a fence. The position of a rotor within the fence impacts its performance; rotors at the ends of a fence extract reduced power compared to those at the centre of the fence, particularly for tip speed ratios greater than the design tip speed ratio.
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Moreira, Tulio Marcondes. "Augmented Tidal Resonant System: Design for Uninterrupted Power Generation." University of Dayton / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1462460475.

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Brammer, James. "Physical and numerical modelling of Marine Renewable Energy technologies, with particular focus on tidal stream and tidal range devices." Thesis, Cardiff University, 2014. http://orca.cf.ac.uk/58699/.

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The past decade has seen a significant rise in the interest of deploying Marine Renewable Energy technologies. Tidal stream technology is developing rapidly, and developers are favouring horizontal axis turbines (HAT’s). However, vertical axis turbines (VAT’s) are better suited for shallow waters, and higher efficiencies can potentially be gained by utilising shallow water blockage effects. The Severn Estuary is an ideal deployment area in this context. Additionally, due to a large tidal range the estuary has long been the subject of tidal barrage proposals. The original ebb-only STPG barrage has recently been superseded by a two-way generation scheme, therefore the need exists for renewed research into the hydrodynamic impacts of this proposal. Furthermore, little is known about the interaction between tidal range and tidal stream technologies, and if they could coexist in the Severn Estuary. This thesis uses physical and numerical modelling techniques to assess a range of MRE technologies, with particular focus on their deployment in the Severn Estuary. Physical model tests of a number of VAT’s were conducted in a recirculating flume. Device performance and the wake characteristics were assessed, and it was demonstrated that VATS’s could potentially provide competitive performance values if deployed in shallow waters. The CFD code ANSYS CFX was used to predict the unsteady turbine behaviour at the physical model scale; good agreement was achieved with the laboratory data, particularly in predicting the wake behaviour. The CFD model TRIVAST was then applied to the Severn Estuary. Comparisons were made of the Severn Barrage schemes, as well as two hypothetical HAT and VAT arrays. The model results confirmed that vertical axis turbines are better suited to the Severn Estuary, provided that the technology is feasible. Finally, whilst the Severn Barrage proposals would eradicate the HAT resource, a lesser impact on the VAT resource was observed.
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Olczak, Alexander. "The influence of waves on tidal stream turbine arrays." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/the-influence-of-waves-on-tidal-stream-turbine-arrays(3ed6653f-1cc3-4e3b-ba03-5e5094a15ecc).html.

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The aim of this research was to quantify the influence of waves on arrays of tidal turbines. Experiments measured the wake of a turbine operating in combined wave-current flows, these were found to reduce velocity deficit as opposed to current only flow. The vertical region of the wake affected was dependant on the wave depth parameter, kd.RANS-BEM and Actuator Line methods were implemented within a commercial CFD code to provide computationally efficient methodologies for the simulation of both large turbine arrays and a turbine subjected to unsteady flow. For scaled experiments thrust coefficient was within 7% and 1% of the flume experiments for the RANS-BEM and Actuator Line methods respectively. The methods were found to give good prediction of a single turbine wake at distances greater than four diameters downstream, provided values of inlet turbulence intensity and length scale were equal to those measured experimentally.An unsteady Actuator Line method was used to quantify rotor loads and wake generation for a turbine operating within combined wave-current flow. The use of a streamwise pulsatile flow was found to give similar rotor and blade loads to simulations using a wave in a two phase volume of fluid simulation. The control strategy adopted by the turbine was found to greatly influence the computed rotor loads and blade bending moments. The wake generated by an Actuator Line method showed a reduction in velocity, however this was smaller than that measured experimentally for equivalent wave conditions.The accuracy with which the RANS-BEM method computed turbine loads and wakes was quantified for a number of one, two and three row arrays. The square of the disk averaged velocity encountered by turbines downstream of a single row of five turbines was found to be predicted to within 5% and 28% for an aligned and staggered arrangement respectively. For the two row arrays, the thrust of individual turbines was within 31% of the experimental measurements. The merged wake downstream of the multiple turbines was well predicted.Measurements of the wake of five porous disks showed combined wave-current flow did not alter the wake in the same manner as a single isolated disk. Measurement of wave energy over the wake showed the downstream current field altered wave propagation, causing a reduction in wave energy over the wake but an increase over the bypass flow. The accuracy of the wave model SWAN was assessed for the calculation of this change in wave characteristics. The model gave good prediction of the lateral variation of wave height over the far wake, however discrepancies in the near wake and upstream of the disk occurred.
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Defne, Zafer. "Multi-criteria assessment of wave and tidal power along the Atlantic coast of the southeastern USA." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/33864.

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The increasing demand for energy and the increased depletion rate of nonrenewable energy resources call for research on renewable alternatives. Mapping the availability of these resources is an important step for development of energy conversion projects. For this purpose, the wave power potential along the Atlantic coast of the southeastern USA, and the tidal stream power along the coast of Georgia are investigated in this study. Wave power potential is studied in an area bounded by latitudes 27 N and 38 N and longitudes 82 W and 72 W (i.e. North Carolina, South Carolina, Georgia, and northern Florida). The available data from National Data Buoy Center wave stations in the given area are examined. Power calculated from hourly significant wave heights and average wave periods is compared to power calculated using spectral wave energy density. The mean power within 50 km of the shore is determined to be low, whereas higher power is available further offshore beyond the 3500 m contour line. The tidal stream power potential along the coast of the state of Georgia is evaluated based on the NOAA tidal predictions for maximum tidal currents and three dimensional numerical modeling of the currents with Regional Ocean Modeling System (ROMS). The modeling results are validated against the available measurements. This region has low to moderate average tidal currents along most of the coast, but with the possibility of very strong local currents within its complex network of tidal rivers and inlets between barrier islands. Tidal stream power extraction is simulated with a momentum sink in the numerical models at the estuary scale to investigate effect of power extraction on the estuarine hydrodynamics. It is found that different power extraction schemes might have counterintuitive effects on the estuarial hydrodynamics and the extraction efficiency. A multi-criteria method that accounts for the physical, environmental and socioeconomic constraints for tidal power conversion schemes is proposed to select favorable locations and to rank them according to their suitability. For this purpose, the model results are incorporated into a Geographical Information System (GIS) database together with other geospatial datasets relevant to the site selection methodology. The methodology is applied to the Georgia coast and the candidate areas with potential are marked.
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Abdul, Rahman Anas. "Numerical modelling of full scale tidal turbines using the actuator disc approach." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/31246.

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In recent years, the actuator disc approach which employs the Reynolds-Averaged Navier-Stokes (RANS) solvers has been extensively applied in wind and tidal energy field to estimate the wake of a horizontal axis turbine. This method is simpler to administer and requires moderate computational resources in modelling a tidal turbines rotor. Nonetheless, the use of actuator disc approximation in predicting the performance of tidal devices has been limited to studies involving an extremely small disc (e.g. rotor diameter of 0.1 meter). The drawback of a small scale actuator disc model is the overestimation of essential parameters such as the mesh density and the resolution of the vertical layers, making them impractical to be replicated in a regional scale model. Hence, this study aims to explore the methodology on implementation of the Three- Dimensional (3D) actuator disc-RANS model in an ocean scale simulation. Additionally, this study also aspires to examine the sensitivity of the applied momentum source term and its validity in representing full-size tidal devices. Nonetheless, before the effectiveness of an actuator disc in a regional model can be tested, tidal flow models for the area of interest needed to be set up first. This was essential for two reasons: (a) to ensure accurate hydrodynamic flow conditions at the deployment site were replicated, (b) to give confidence in the outputs produced by the regional scale actuator disc simulations, since in-situ turbine measurement data from a real deployment site were difficult to source. This research was undertaken in two stages; in the first stage, a numerical model which can simulate the tidal flow conditions of the deployment sites was constructed, and, in the second stage, the actuator disc method which is capable of modelling an array of real scale-sized tidal turbines rotors has been implemented. In the first stage, tidal flow simulations of the Pentland Firth and Orkney Waters (PFOW) were conducted using two distinct open-source software - Telemac3D, which is a finite element based numerical model, and Delft3D, which is a finite difference based model. Detailed methodologies in developing a 3D tidal flow model for the PFOW using both numerical models were presented, where their functionality, as well as limitations were explored. In the calibration and validation processes, both models demonstrated excellent comparison against the measured data. However, Telemac3D was selected for further modelling of the actuator disc considering the model's capability to perform parallel computing, together with its flexibility to combine both structured and unstructured mesh. In the second stage, to examine the actuator disc's accuracy in modelling a full size tidal device, the momentum source term was initially applied in an idealised channel study, where the presence of a 20-meter diameter turbine was simulated for both single and array configurations. The following parameters were investigated: (i) size of the unstructured mesh utilised in the computational domain, (ii) variation in disc's thickness, (iii) resolution of the imposed structured grid to represent turbine's enclosure, (iv) variation in the vertical layers, and (v) influence of hydrostatic and non-hydrostatic formulations on the models' outputs. It is to be noted that the turbine's support structures have not been included in the modelling. The predicted velocities and computed turbulence intensities from the models were compared against laboratory measurement data sourced from literature, where excellent agreement between the model outputs and the data from literature was observed. In essence, these studies highlighted the efficiency and robustness of the applied momentum source term in replicating the wake profiles and turbulence characteristics downstream of the disc, hence providing credence in implementing the actuator disc method for a regional scale application. Subsequently, the validated actuator disc method was applied to the Inner Sound region of the Pentland Firth to simulate arrays of up to 32 tidal turbine rotors. The wake development, flow interactions with the rotor arrays, and flow recovery at the Inner Sound region have been successfully mapped. Also, this study highlighted the importance of employing optimal numerical margins, specifically for the structured grid and horizontal planes, as both parameters were relevant in defining the disc's swept area. As published materials on the implementation of actuator disc approach within a regional scale model is still scarce, it was aspired that this work could provide some evidence, guidance and examples of suggested best practice in effort to fill the research gap in modelling tidal turbine arrays using the actuator disc approach.
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Martinez, Fabien. "Drag study of the nacelles of a tidal stream device using CFD." Thesis, Cranfield University, 2010. http://dspace.lib.cranfield.ac.uk/handle/1826/7440.

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Nowadays, renewable energy is in full growth. In particular, offshore wind farms will be at the centre of UK energetic strategy in the coming years. However, other types of marine renewable are still at an early development stage. That is the case for tidal energy. Many projects have been undertaken but there is no candidate for competitive commercial applications yet. Deltastream is one of these numerous pioneering projects. It consists of a set of three marine current turbines mounted on a triangular base put down onto the seabed. The device is not moored and no harm is done to the environment. However, that makes the structure more sensitive to water flows. And it is important to ensure that it will remain at its location and not being carried along with the tidal streams. Using CFD, the present study aims to evaluate the drag on the nacelles of the structure and come up with solutions to reduce it as much as possible.
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Books on the topic "Tidal renewable energy"

1

Charlier, Roger Henri. Ocean Energy: Tide and Tidal Power. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009.

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Energy from water: Hydroelectric, tidal, and wave power. St. Catharines, Ontario: Crabtree, 2016.

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Cooper, W. Guidelines for the use of metocean data through the life cycle of a marine renewable energy development. London: CIRIA, 2008.

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Cooper, W. Guidelines for the use of metocean data through the life cycle of a marine renewable energy development. London: CIRIA, 2008.

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Offshore renewable energy: Accelerating the deployment of offshore wind, tidal, and wave technologies. Abingdon, Oxon: Earthscan, 2012.

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Energy from sun, wind, and tide. Hillside, N.J: Enslow Publishers, 1988.

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Marine Renewable Energy Research and Development Act of 2007: Report (to accompany H.R. 2313) (including cost estimate of the Congressional Budget Office). [Washington, D.C: U.S. G.P.O., 2007.

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Developing untapped potential: Geothermal and ocean power technologies : hearing before the Subcommittee on Energy and Environment, Committee on Science and Technology, House of Representatives, One Hundred Tenth Congress, first session, May 17, 2007. Washington, D.C: U.S. G.P.O., 2008.

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Neng yuan zi yuan ti dai zhan lüe yan jiu: Nengyuanziyuan tidai zhanlue yanjiu. Beijing Shi: Zhongguo shi dai jing ji chu ban she, 2008.

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Iglesias, Gregorio, and Deborah Greaves. Wave and Tidal Energy. Wiley & Sons, Incorporated, John, 2018.

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Book chapters on the topic "Tidal renewable energy"

1

Bryden, Ian G. "Tidal Energy tide/tidal energy." In Renewable Energy Systems, 1466–74. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-5820-3_700.

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Capareda, Sergio C. "Tidal Energy." In Introduction to Renewable Energy Conversions, 239–64. First edition. | Boca Raton, FL : CRC Press/Taylor & Francis Group, 2019.: CRC Press, 2019. http://dx.doi.org/10.1201/9780429199103-9.

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Thomson, Jim, Brian Polagye, and Vincent S. Neary. "Tidal Energy Resource Measurements." In Marine Renewable Energy, 121–36. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-53536-4_5.

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de Laleu, Vincent. "Production of Tidal Range Energy." In Marine Renewable Energy Handbook, 173–218. Hoboken, NJ USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118603185.ch7.

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Haas, Kevin, Zafer Defne, Xiufeng Yang, and Brittany Bruder. "Hydrokinetic Tidal Energy Resource Assessments Using Numerical Models." In Marine Renewable Energy, 99–120. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-53536-4_4.

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Kristoferson, L. A., and V. Bokalders. "17. Small-scale Hydropower; Ocean Power: Tidal, Wave & OTEC." In Renewable Energy Technologies, 257–79. Rugby, Warwickshire, United Kingdom: Practical Action Publishing, 1991. http://dx.doi.org/10.3362/9781780445762.017.

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Benbouzid, Mohamed, Jacques André Astolfi, Seddik Bacha, Jean Frédéric Charpentier, Mohamed Machmoum, Thierry Maitre, and Daniel Roye. "Concepts, Modeling and Control of Tidal Turbines." In Marine Renewable Energy Handbook, 219–78. Hoboken, NJ USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118603185.ch8.

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Ruer, Jacques. "Feedback from the Sabella Tidal Current Turbine Project." In Marine Renewable Energy Handbook, 311–22. Hoboken, NJ USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118603185.ch10.

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Yang, Zhaoqing, and Taiping Wang. "Effects of Tidal Stream Energy Extraction on Water Exchange and Transport Timescales." In Marine Renewable Energy, 259–78. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-53536-4_11.

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Brun, Pierre, Laurent Terme, and Agnès Barillier. "Paimpol-Bréhat: Development of the First Tidal Array in France." In Marine Renewable Energy Handbook, 279–310. Hoboken, NJ USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118603185.ch9.

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Conference papers on the topic "Tidal renewable energy"

1

Mackie, G. "Development of Evopod Tidal Stream Turbine." In Marine Renewable Energy 2008. RINA, 2008. http://dx.doi.org/10.3940/rina.mre.2008.07.

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Adams, N., D. Ranford, P. Grosse, and J. Armstrong. "A Systems Approach to Tidal Array Optimisation." In Marine Renewable & Offshore Wind Energy. RINA, 2010. http://dx.doi.org/10.3940/rina.mre.2010.12.

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Watson, I., J. R. Armstrong, and E. P. Goddard. "Commercialising Wave and Tidal Energy: an Enterprise Roadmap." In Marine Renewable & Offshore Wind Energy. RINA, 2010. http://dx.doi.org/10.3940/rina.mre.2010.03.

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Davies, P. G., and D. Radosavljevic. "A Review of Modelling Techniques for Tidal Turbines." In Marine & Offshore Renewable Energy 2012. RINA, 2012. http://dx.doi.org/10.3940/rina.mre.2012.03.

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Salvatore, F., and L. Greco. "Development and Assessment of Performance Prediction Tools for Wind and Tidal Turbines." In Marine Renewable Energy 2008. RINA, 2008. http://dx.doi.org/10.3940/rina.mre.2008.09.

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Murray, Donal B., Paul Gallagher, Ben Duffy, and Vincent McCormack. "Energy storage solutions for offshore wave and tidal energy prototypes." In 2017 Twelfth International Conference on Ecological Vehicles and Renewable Energies (EVER). IEEE, 2017. http://dx.doi.org/10.1109/ever.2017.7935944.

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Lazakis, I., O. Turan, and T. Rosendahl. "Risk Assessment for the Installation and Maintenance Activities of a Low-Speed Tidal Energy Converter." In Marine & Offshore Renewable Energy 2012. RINA, 2012. http://dx.doi.org/10.3940/rina.mre.2012.02.

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Nakanishi, Yoshitaka, Kenryo Shimazu, Yasuaki Matsumoto, Shintaro Kai, Yuichi Oka, and Hidehiko Higaki. "Eco-friendly bearing for tidal power generation." In 2012 International Conference on Renewable Energy Research and Applications (ICRERA). IEEE, 2012. http://dx.doi.org/10.1109/icrera.2012.6477470.

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Nguyen, Manh Hung, Haechang Jeong, and Changjo Yang. "A Study on Performance of New Tidal Energy Converter for Tidal Current Extraction Using Computational Fluid Dynamics." In ASME 2016 Fluids Engineering Division Summer Meeting collocated with the ASME 2016 Heat Transfer Summer Conference and the ASME 2016 14th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/fedsm2016-7755.

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Renewal energy technologies are increasingly popular to ensure future energy sustainability and to balance environmental issues. The growing interest in exploring tidal energy has compelling reasons such as security and diversity of supply, intermittent but predictable and limited social and environmental impacts. The energy available in tidal currents or other artificial water channels is being considered as viable source of renewable power. Hydrokinetic conversion systems, albeit mostly at its early stage of development, may appear suitable in harnessing energy from such renewable resources. A concept of tidal energy converter (TEC) which is based on shape of the conventional water wheels, is introduced in this study. Basically, this turbine has several special features that are potentially more advantageous than the conventional tidal turbines, such as propeller type tidal turbines. The research aims to study the possibility of twelve-blade turbine in extracting the hydrokinetic energy of tidal current and converting it into electricity, and evaluate the performance of the turbine at different given arrangements of blades (single and double rows) using Computational Fluid Dynamics (CFD). In all cases of tip-speed ratio (TSR), the twelve-blade double-row type obtains higher power efficiency, especially about 20% power coefficient at TSR = 0.75, in comparison with 13% power coefficient of the single-row one. Furthermore, by changing the arrangement of rotating blades, the torque’s absorption from the rotor shaft of twelve-blade double-row turbine is more uniform due to the less interrupted and fluctuated generation of force for a period of time (one revolution of the rotor).
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Ghefiri, Khaoula, Soufiene Bouallegue, and Joseph Haggege. "Modeling and SIL simulation of a Tidal Stream device for marine energy conversion." In 2015 Sixth International Renewable Energy Congress (IREC). IEEE, 2015. http://dx.doi.org/10.1109/irec.2015.7110882.

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Reports on the topic "Tidal renewable energy"

1

Driscoll, Frederick R. University of Washington/ Northwest National Marine Renewable Energy Center Tidal Current Technology Test Protocol, Instrumentation, Design Code, and Oceanographic Modeling Collaboration: Cooperative Research and Development Final Report, CRADA Number CRD-11-452. Office of Scientific and Technical Information (OSTI), November 2016. http://dx.doi.org/10.2172/1334396.

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