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- 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,…
- 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:
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…
- Conference Paper:
Patricio et al.
Future large-scale implementation of wave energy converts (WECs) will introduce an anthropogenic activity in the ocean which may contribute to underwater noise. The Ocean houses several marine species with acoustic sensibility; consequently the potential impact of the underwater noise needs to be addressed. At present, there are no acoustic impact studies based on acquired data. The WEAM…
- Conference Paper:
Tease et al.
This paper describes the methods developed by Wavegen during the design and development phase of its air turbine suitable for installation into active renewable energy breakwater schemes. The main areas of focus are related to design optimisation, product standardisation and refining manufacture methods to enable development of a commercial product.
Different types of parametric…
- Conference Paper:
Rodriguez et al.
One immediate challenge for the commercial development of floating Marine Renewable Energy Converters is reducing the weight and associated costs of mooring lines in deep water (>75m). Synthetic fibre ropes offer already a solution to the weight problems of using steel lines in deep-water offshore oil and gas installations as they have a very low weight in water. The present study focuses…
- Journal Article:
Walsh et al.
Maintaining the engineering health of Marine Renewable Energy Devices (MREDs) is one of the main limits to their economic viability, because of the requirement for costly marine interventions in challenging conditions. Acoustic Emission (AE) condition monitoring is routinely and successfully used for land-based devices, and this paper shows how it can be used underwater. We review the acoustic…
- Conference Paper:
Yagci and Wegener
Conversion of wave motion to electrical energy depends on the instantaneous sea state at a given location, which can change on second, minute and hour time-scales. In particular, information about wave groupiness (sets) is important in determining the efficiency of a wave energy converter at a given location. We report the use of a spectral method to analyze buoy time data to determine the sea…
- Journal Article:
Buscaino et al.
In this study, underwater noise from a full-scale wave energy converter system (ISWEC), installed on the coast of Pantelleria Island (central Mediterranean Sea), was characterized. The noise was measured using an autonomous acoustic recorder anchored to the sea bottom 40m from the ISWEC hull. Acoustic monitoring continued for 15 months, starting 7 months before (PRE), 2 months during (INST)…
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