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- Journal Article:
Marrone et al.
The present work addresses the evaluation by numerical simulation of the extreme loads acting on a flap-type wave energy converter. To this aim, a realistic situation is considered: an extreme wave impacting a bottom-mounted pitching device, consisting of a partly submerged flap, placed in front of a dike on the coast of Bayonne, south-west Atlantic coast, France. The SPH model can be an…
- Report:
Ocean Energy Systems
This report provides insights of 20 ocean energy projects and 5 policy initiatives on the OES member countries. These projects are good examples of the intense activity of this emerging sector but there is a much larger number of relevant projects being developed world wide not included in this report.
- 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…
- Report:
Burman and Walker
This paper presents an overview of ocean energy technology as a source of renewable energy for U.S. Federal sites. It investigates ocean energy resources and new technologies under development to capture that energy. These technologies span:
- Wave energy
- Tidal Energy
- Marine current energy
- Ocean thermal energy conversion (OTEC)
A brief history…
- Conference Paper:
Ringwood
This paper examines the challenges of efficiently harnessing wave energy. A variety of energy conversion device types is reviewed and a generic heaving buoy device selected for detailed examination. A number of modelling and control challenges are detailed and a hierarchical control structure is indicated. Both potable water production and electricity generation are included as possible uses…
- Report:
Oregon Department of Energy
In 2017, the Oregon Department of Energy, recognizing that the energy world has changed
dramatically since the 1970s, introduced HB 2343. The bill charged the department with developing a new Biennial Energy Report to inform local, state, regional, and federal energy policy development and energy planning and investments. This report – based on analysis of data and information collected… - Journal Article:
Göteman
An analytical model for point-absorbing wave energy converters connected to floats of different geometries and topologies is presented. The floats can be truncated cylinder or cylinder with moonpool buoys and have different outer radius, inner radius, draft, mass and can be connected to linear generators of different power take-off constants. The model is implemented into a numerical code…
- Journal Article:
Fernandes and Fonseca
Most of the wave energy converters under development are planned for operation in shallow to intermediate water depths, typically 30 m to 70 m. However, the limited water depth reduces the wave energy resource as compared to offshore deep water. This paper presents an analysis of the water depth effects on the wave energy resource and on the energy absorbed by a floating device. The analysis…
- Journal Article:
Erinofiardi et al.
Potential energy from fluid flow of small rivers or irrigations could be extracted become electricity by using screw turbine. This turbine is promising because the advantages of ultra-low head and fish friendly.Experimental performance of screw turbine for ultra-low head hydro resource is presented in this paper. The screw turbine with anoutside diameter of 142 mm and the water flowrate of 1.2…
- Journal Article:
Atwater and Lawrence
The extraction of kinetic energy from tidal flows is an interest of the renewable energy industry with large scale assessments of the potential resource already conducted. These assessments however, use the natural kinetic energy flux as the primarily metric of the available resource. This approach has significant limitations when it is applied to tidal channels, particularly those tidal…
- Journal Article:
Fernandez et al.
For renewable wave energy to operate at grid scale, large arrays of Wave Energy Converters (WECs) need to be deployed in the ocean. Due to the hydrodynamic interactions between the individual WECs of an array, the overall power absorption and surrounding wave field will be affected, both close to the WECs (near field effects) and at large distances from their location (far field effects).…
- Journal Article:
Ramos and Ringwood
Over the next decades, tidal stream energy aims to become a fully commercially viable energy source. For this purpose, complete knowledge regarding tidal stream resource assessment is essential. In this context, the International Electrotechnical Commission has developed a technical standard for the assessment of the tidal stream resource, “IEC 62600-201 TS: Marine energy - Wave, tidal and…
- Journal Article:
Iglesias et al.
In many regions strong tidal flow occurs only in areas with restricted water depths, typically within estuaries or rias. Although in some of these areas the depth constraint may preclude the exploitation of this resource, in others it is exploitable – and substantial. The objective of this work is twofold: (i) to develop a tool, the Tidal Stream Exploitability (TSE) index, to facilitate the…
- Journal Article:
Todeschini
The number of distributed resources for renewable energy installed worldwide has been increasing rapidly in the last decade, and the great majority of these installations consist of solar panels and wind turbines. Other renewable sources of energy are not exploited to the same level: for instance, tidal energy is still a minute portion of the global energy capacity, in spite of the large…
- Journal Article:
Wang
This paper concerns the prediction of the power outputs of wave energy converters (WECs) operating in shallow water nonlinear waves. The bottom effects on the power performances of WECs (a phenomenon that has always been overlooked by the previous researchers) have been taken into account during the calculations. Using an oscillating surge wave energy converter (OSWEC) as an example, it is…
- Journal Article:
Scarlett et al.
Tidal turbines operate in a highly unsteady environment, which causes large-amplitude load fluctuations to the rotor. This can result in dynamic and fatigue failures. Hence, it is critical that the unsteady loads are accurately predicted. A rotor's blade can experience stall delay, load hysteresis and dynamic stall. Yet, the significance of these effects for a full-scale axial-flow turbine are…
- Journal Article:
Pollard et al.
The Orkney archipelago has a rich heritage that includes the Heart of Neolithic Orkney World Heritage Site, Viking settlements, harbours supplying Hudson's Bay Company ships, and the wartime naval base of Scapa Flow. This rich history has left its mark on the seabed but accurate maps showing the location and character of surviving seabed archaeology do not exist to the same…
- Journal Article:
Thies et al.
An increasing number of marine renewable energy (MRE) systems are reaching the stage where a working prototype must be demonstrated in operation in order to progress to the next stage of commercial projects. This stage is often referred to as valley of death' where device developers face the challenge of raising capital needed to demonstrate the prototype. The dilemma is that investors…
- Journal Article: Pacheco and Ferreira
Hydrodynamic changes imposed by tidal energy converters on extracting energy on a real case scenario
The development on tidal turbine technology is ongoing with focus on several aspects, including hydrodynamics, operation and environment. Before considering an area for exploitation, tidal energy resource assessments in pre-feasibility energy extraction areas must include the relevant characteristics of the device to be used. The present paper uses the momentum source approach to represent a…
- Journal Article:
Suarez-Lopez et al.
Tides can be a vast and predictable source of renewable energy. Due to the solar and lunar influx on our planet, they move large amounts of water periodically, and this energy can be harnessed using devices designed and positioned adequately, such as current turbines. However, the relation between the energy obtained with actual devices and the economic and environmental cost of their…
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