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- Thesis:
Walsh
Marine renewable energy has the potential to produce up to 20% of the UK’s current electricity demand, leading to extensive research and development activities in this area. As the industry of wave energy progresses toward commercialisation, a number of barriers still limit its potential, including the cost of energy. A significant portion of this is the cost of operation and maintenance…
- Presentation:
Bassett
In spring 2022 R/V Russell Davis Light was moored in Agate Pass, Washington, to perform the first saltwater test of a university-developed tidal turbine designed for sustained deployment as a bottom lander to power oceanographic sensors. The system, as deployed, was self-contained in that all system components associated with a hypothetical bottom-lander configuration were present. Potential…
- Workshop Article:
BOEM Office of Renewable Energy Programs
On June 2 and 3, 2021, the Bureau of Ocean Energy Management (BOEM) convened the first of two workshops entitled Improving Monitoring, Data Consistency, Archiving, and Access for Improved Regional Integration of Renewable Energy Science: Passive Acoustic Monitoring and Marine Mammals. Approximately 45 people attended the workshop with participants including state and federal agencies,…
- Presentation:
Swansea University
This instrument improves the quality of measurement of velocity and turbulence in a tidal channel. The measurement point is designed to be at hub height of a tidal turbine. From these measurements, a more accurate estimate of the forces applied to a tidal turbine by the flow can be gained. More certainty of loading on a tidal turbine means that the structure does not need to be overdesigned,…
- Journal Article:
Wang et al.
The paper presents an experimental investigation on the cavitation, noise, and slipstream characteristics of an ocean tidal stream turbine together with a discussion on the test facilities and methodology used. The experiments were conducted in a cavitation tunnel used to test marine propellers, with the same similarity laws as are used for a marine propeller. The cavitation patterns were…
- Journal Article:
Wei et al.
This study presents a fully coupled numerical approach to study wave energy converters interaction with water waves. The open-source Smoothed Particle Hydrodynamics model GPUSPH is used to resolve wave dynamics and compute the hydrodynamic force on wave energy converters. The dynamics of wave energy converter is computed by the open-source physics engine, Project Chrono. The capability of the…
- Conference Paper:
Henriques et al.
Oscillating-water-column (OWC) is the most developed technology for wave energy conversion, and several prototypes have been deployed and tested on the sea. An important aspect of the long term environmental impact assessment of this technology concerns noise emission. The power take-off system of an OWC comprises a self-rectifying air turbine connected to an electrical generator through a…
- Conference Paper:
Frost et al.
Tidal resource assessment for the characterisation of turbine performance or Annual Energy Prediction currently uses the method of bins as recommended by international standards. An alternative method is proposed in this paper and applied to the Sustainable Marine Energy PLAT-I deployment in Connel Sound, Scotland. This method may be suitable for tidal turbines which operate from the surface.…
- Conference Paper:
Browning et al.
This study investigates methods to quantify the effects of turbulence on power generation from hydrokinetic current energy converters (CECs) in natural settings with high Reynolds numbers on the order of 106. In Alaska and other similar riverside locales, deployments are complicated by debris, such as trees, root balls and other large objects. The presence of debris requires a means of…
- Conference Paper:
Enders et al.
The Minas Passage, one of the Bay of Fundy’s tidal channels, located in Nova Scotia, Canada, presents significant potential for tidal energy development because of its highly energetic flows. The rise of floating tidal turbines makes it increasingly important to develop tools for accurate spatiotemporal near-surface flow mapping in the area. In this investigation we present a strategy for…
- Conference Paper:
Schmitt et al.
The first tidal turbine arrays have now been installed as the world strives to reach net zero carbon targets by 2050. Underwater noise emissions from single tidal turbine devices have caused some environmental concern in the past and therefore determining levels of noise emitted from these structures has become a crucial component of the consenting process. Ecological concerns include auditory…
- Conference Paper:
Ingram et al.
Tidal turbines are typically conservatively designed leading to additional, associated, expense. Overdesign is commonly driven by a limited understanding of the conditions at the deployment site. The RealTide project aims to tackle this conservative design by producing an open-access database of field and experimental data, providing a fuller understanding of the spatial and temporal variation…
- Journal Article:
Lloyd et al.
Large eddy simulations of a model scale tidal turbine encountering inflow turbulence have been performed. This has allowed both unsteady blade loading and hydrodynamic noise radiation to be predicted. The study is motivated by the need to assess environmental impact of tidal devices, in terms of their acoustic impact on marine species.
Inflow turbulence was accounted for using a…
- Conference Paper:
Walsh et al.
Marine renewable energy (MRE) is an emerging technology and at present there are an increasing number of MRE prototypes and full-scale devices deployed. The future commercialization in the near future may contribute to the mitigation of carbon emissions and diversify the renewable electricity generation portfolio. Because of the high costs of marine intervention, it is important to establish…
- Conference Paper:
Bassett et al.
Field measurements of the underwater acoustic signature of Columbia Power Technologies (Columbia Power) SeaRay wave energy converter (WEC) prototype are presented. The device was deployed in the vicinity of West Point (Puget Sound, Washington State) at a depth of approximately 20 meters. The 1/7th scale SeaRay prototype is a heave and surge, point absorber secured to the seabed with a three-…
- Journal Article:
Fontaine et al.
As hydrokinetic turbine technologies continue to advance towards commercialization, public datasets on the performance characteristics for these devices and their flow field effects are invaluable to advance our understanding of these technologies and to validate analytical and numerical models. The Applied Research Laboratory at The Pennsylvania State University (ARL Penn State) collaborated…
- Conference Paper:
Daroux and Zydlewski
The effect of tidal in-stream energy conversion (TISEC) devices on fish remains largely unknown and long-term fish monitoring is essential to assess such effects. The goal of this project was to quantify relative fish distribution changes associated with the presence of a deployed TISEC device in Nova Scotia, Canada. Mobile active acoustic surveys (n=6) were performed before (n=3) and after (n…
- Conference Paper:
Sanderson et al.
Environmental effects assessment at Canada’s tidal energy test site in the Bay of Fundy includes quantifying fish encounters with marine hydrokinetic (MHK) devices. Acoustic tags have been implanted within the body cavities of fish so their presence could be detected but converting detections to encounters requires also knowing the probability that a transmission from an acoustic tag will be…
- Conference Paper:
Polagye et al.
The Fred. Olsen Lifesaver, a point-absorber wave energy converter, was deployed at the US Navy Wave Energy Test Site in Kaneohe, HI (USA) from March 2016 to April 2017. A combination of free-drifting and stationary measurements were used to characterize its acoustic signature over a range of sea states. Comparisons are made between co-spatial and cotemporal observations that investigate…
- Conference Paper:
Finlay et al.
A tidal energy barrage has been proposed for the Severn Estuary, UK. In order to predict the effect such a structure may have on the tidal resonance in the channel, a simple two dimensional model has been developed for a series of simulated estuaries, ranging from a simple box channel with a uniform flat bed to a simple wedge shaped channel with a solid barrier across, to a simulation of the…
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