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- Book Chapter:
Lynn
A huge effort is now under way to develop energy systems that make use of natural energy flows in the environment — including those produced by waves and tidal streams. Since the reduction of carbon emissions is a principal advantage of wave, tidal and other renewable technologies, one should recognise that this benefit is also proclaimed by supporters of nuclear power. This chapter considers…
- Book Chapter:
Lynn
This chapter presents a case study on tidal energy converters. It describes a number of devices at the forefront of development, many of which are being, or have been, tested at the European Marine Energy Centre (EMEC) in Orkney. The authors also raise a variety of practical issues that greatly affect device developers as they build, deploy and test devices which, in many cases, approach or…
- Book Chapter: Lynn
- Book Chapter:
Lynn
This chapter aims to shed light on such alternating current (AC) curiosities as reactance and impedance, real and reactive power and power factor correction to introduce the operating principles of electrical generators and explains how modern electronic control eases the problem of converting unruly marine energy into the well‐behaved electricity required by an electricity grid. Finally, the…
- Book Chapter:
Lynn
This chapter talks about marine energy capturing. It introduces the physics of ocean waves and tidal streams as a prelude to explaining the principles underlying some of today's most promising developments. Wave measurement buoys are used by marine energy organisations to provide the continuous, long‐term, data required by wave energy developers as they deploy their machines offshore. Wave…
- Book Chapter:
Bhatnagar et al.
Marine renewable energy generated from ocean tides and waves has not yet reached wide spread deployment or full commercial availability on par with comparable sources. This handbook chapter describes the global development of marine renewable energy technology and the most promising commercialization pathways, including “blue economy” marine applications, competitiveness in new electric grid…
- Book Chapter:
Davidson et al.
Wave energy conversion is an active field of research, aiming to harness the vast amounts of energy present in ocean waves. An essential development trajectory towards an economically competitive wave energy converter (WEC) requires early device experimentation and refinement using numerical tools. OpenFOAM ® is proving to be a useful numerical tool for WEC development, having been…
- Book Chapter:
Majumdar et al.
India being a tropical country, has a large ocean thermal gradient available throughout the year that can be utilized to extract energy. This energy can be used to power a Low-temperature thermal desalination (LTTD) plant using the Ocean Thermal Energy Conversion (OTEC) method. OTEC works at a very low pressure, and developing a low-pressure turbine for OTEC is very challenging. The turbine…
- Book Chapter:
Ringwood et al.
The modelling approach presented in this chapter is that of system identification, where models are determined from input/output data measured from the system under study. Models identified from recorded wave energy converter (WEC) data can accurately describe WEC behaviour, provided the data is of a sufficiently high quality. The chapter details generating data for the system identification…
- Book Chapter:
Mingham et al.
Fundamental principles of computational fluid dynamic (CFD) modelling are presented together with a brief review of CFD applied to wave energy converters. Results are presented for a range of models including incompressible and compressible two-phase flows. Limitations of CFD modelling are discussed together with future developments in CFD.
This is a chapter from…
- Book Chapter:
Fitzgerald
Fully nonlinear potential flow (FNPF) models extend the regime of validity of linear potential flow models to include wave–body interactions in steep sea-states and/or involving large body displacements. More accurate predictions of wave kinematics, wave forces, and body motions can be obtained, compared to linear model predictions for interactions involving large free-surface and body…
- Presentation:
Rose and Ertsgaard
Most future emissions models predict that hundreds of billions of tons of carbon dioxide removal is needed by the end of the 21st century to complement emission reductions to meet the goals of the 2015 Paris Agreement. Macroalgae farming has been identified by several highly recognized organizations as a potential carbon capture strategy, and significant research investments have…
- Presentation:
Farr et al.
The marine energy industry is advancing from early-stage research and development towards large scale deployments and commercialization. Many US participants have been active in the industry for over a decade and have learned some hard-fought lessons. This study sought to capture these lessons and ensure that knowledge is not lost, past mistakes are avoided, and successes are capitalized on.…
- Presentation:
Browning et al.
Many remote communities in Alaska have significant hydrokinetic resources. However, the remote locations make collecting large amounts of resource data challenging and costly. Through accurately up sampling hourly ADCP data, we are seeking ways to faithfully reproduce annual energy estimates for velocity time series with high enough temporal resolution to be useful for grid-modeling tools.…
- Presentation:
Robertson et al.
Extracting useful electricity from ocean waves is consistently receiving significant research attention. However, the technology of wave energy conversion is underdeveloped. There are many challenges that need to be addressed in order to improve the economic index of wave energy converters (WECs). One important challenge is the expenditures on developing the energy storage units to improve the…
- Presentation:
McWilliams et al.
The development and success of commercial scale marine energy (ME) projects are connected to a thorough understanding of how ME devices interact with the surrounding environment. Quantification of these effects can help facilitate effective site planning and communication between developers, regulators, and stakeholders. Understanding the interplay of ME conversion technologies and the local…
- 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…
- Presentation:
Niffenegger et al.
The HexDEEC is a small, characteristic length approximating a centimeter, energy transducer that converts the dynamic deformations of its elastomer housing into electricity through a variable capacitance charging-discharging cycle. This device is a type of Distributed Embedded Energy Converter Technology (DEEC-Tec), a new domain for marine renewable energy research that utilizes a…
- Presentation:
Kim et al.
Ocean waves represent a significant source of renewable energy.
However, accessing and converting this energy requires working at the boundary of several physics domains: hydrodynamics, mechanics, electrical, and control.
This project explores the development of a multiphysics unifying modeling framework based on equivalent electrical circuits.The two-body Reference Model…
- Presentation:
Abdellatef et al.
As rotary power take-offs (PTO) are showing promising advantages for commercial wave energy converters (WECs), especially as rope elements are replaced with composite polyurethane-steel tension belts, the service life predictions of the PTO are becoming a major concern in design. Using belts instead of ropes for winching elements is shown to improve Cyclic Bend Over Sheave (CBOS) performance…
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