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- Journal Article:
Singh et al.
To investigate the dynamic response of a floating moored oscillating water column device under realistic sea states, a focused wave technique was developed in this study to generate user-defined wave trains in a wave basin equipped with a piston-type wavemaker. The experimental setup allowed for simultaneous measurements of the designed focused wave trains, internal chamber wave elevations and…
- Journal Article:
Yiru et al.
A novel tidal turbine with winglet is given, and the influences of winglets on the hydrodynamic performance of horizontal axis current turbines (HACT) are investigated. The incompressible Reynolds-Averaged Navier–Stokes (RANS) Equations with the k − ω shear stress transport (SST) turbulence model are solved. Two HACTs with the winglet that bent towards the pressure side or…
- Journal Article:
Reabroy et al.
The hydrodynamic and power capture performance of an asymmetric floating device called “Dolphin” wave energy converter (WEC) integrated with a fixed breakwater has been proposed. The operation of the floating WEC device is restricted to the vertical direction called heaving motion. In this research, the theories of heaving motion, wave energy conversion, and computational fluid dynamics (CFD)…
- Thesis:
Ai
The hydrodynamic performance of the common three-blades horizontal axis current turbine (HAMCT) is computationally investigated to seek paths of improvement. Two computational approaches are used, namely the Blade Element Method (BEM) and Computational Fluid Dynamics (CFD)-Reynolds Averaged Navier Stokes (RANS). Two BEM codes were written for steady and unsteady calculations. Both account for…
- Conference Paper:
Nerubenko et al.
The marine buoys are subjected to aggressive dynamic loads. One of the recently invented effective tools for suppressing the negative impact of these loads is the energy harvesting devices. The proposed energy harvester consists of two main components: tuned mass damper and electricity generator. The innovative component of that energy harvester is specifically designed tuned mass damper…
- Journal Article:
Khan et al.
The energy in flowing river streams, 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 number of resource quantization and demonstrations have been conducted throughout the world and…
- Conference Paper:
Dang et al.
In this paper, a horizontal-axis ocean current turbine is taken as investigation object, to study the Fluid-Structure Interaction (FSI) effect at working conditions. With the help of finite element analysis software ANSYS, the pressure on the turbine is calculated in the flow field, which provide input loadings for static structural analysis before prestress modality analysis. The results show…
- Journal Article:
Liu et al.
Oscillating water column (OWC) wave energy converters (WECs) have two energy conversion stages. In this study, an axial-flow impulse turbine was installed on an OWC model to replace the traditional substitute, such as the orifice plate. The OWC model was placed in a wave flume for the experimental tests under regular wave conditions. This experimental setup was expected to reflect more actual…
- Journal Article:
Abdelrahman and Patton
Several energy maximization control approaches for point-absorber wave-energy converter (PAWEC) systems require knowledge of the wave excitation force (WEF) that is not measurable during the PAWEC operation. Many WEF estimators have been proposed based on stochastic PAWEC modeling using the Kalman filter (KF), extended KF (EKF), or receding-horizon estimation. Alternatively, a deterministic…
- Conference Paper:
Raftery and Jones
A study by the Electrical Power Research Institute and U.S. Department of Energy (DOE) reported an estimated total available wave energy resource of 2,640 terawatt-hours (TWh) per year and total recoverable wave energy resource at 1,170 TWh per year for the territorial waters over the Outer Continental Shelf of the United States in 2011. While Wave Energy Conversion (WEC) systems have been in…
- Conference Paper:
van Hemmen and Raftery
It is time for Wave Energy Conversion (WEC) to be part of the sustainable energy toolbox at a utility level. Solar and wind renewable power systems are now sustainable technologies which are economically competitive with existing fossil fuel and nuclear options. Even though there have been WEC development efforts as long as there have been industrial solar and wind efforts, WEC systems simply…
- 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)…
- Journal Article:
Engström et al.
In a future energy system based on renewable energy sources, wave energy will most likely play a role due to its high energy potential and low intermittency. The power production from parks of wave energy converters of point absorber type has been extensively studied. This is also the case for the wave energy resource at many coastal areas around the globe. Wave energy has not yet reached a…
- Conference Paper:
Shi et al.
This article presents a data-efficient learning approach for the complex-conjugate control of a wave energy point absorber. Particularly, the Bayesian Optimization algorithm is adopted for maximizing the extracted energy from sea waves subject to physical constraints. The algorithm learns the optimal coefficients of the causal controller. The simulation model of a Wavestar Wave Energy…
- Journal Article:
Arribas
The utilisation of marine current turbines with horizontal axis for electrical power production offers a sustainable and clean option to augment traditional energy technologies and enhance the expansion of renewable energies in the marine field. Some prototypes of these turbines are now available and operating. The advantages of tidal currents for renewable energies when compared with wind…
- Journal Article:
Lopez et al.
Tidal Energy Conversion farms are a promising but not yet mature technology whose costs are still highly uncertain. In order to be able to predict costs for early Technology Readiness Level (TRL) phases, this paper presents a cost model in which a detailed parametrization of all Capital Expenditures and Operation and Maintenance items has been carried out, whose results make it possible to…
- Journal Article:
Ramakumar et al.
Advanced energy technologies span a wide variety of resources, techniques, and end-user requirements. Economic considerations are major factors that shape their harnessing and utilization. A discussion of the basic factors in the economic arena is presented, with particular emphasis on renewable energy technologies-photovoltaics, solar-thermal, wind-electric conversion, biomass utilization,…
- Journal Article:
Walls et al.
Tidal turbine applications will place composite materials such as glass-fibre and carbon-fibre reinforced polymers under surprisingly high pressure due to the significant water depths they operate in (to depths of 50 m). The technical reliability of tidal turbines must be guaranteed despite the high dynamic loads resulting from a combination of plant operation, wind and waves with irregular…
- Book:
Zheng et al.
This book focuses on the evaluation of wave energy in the Maritime Silk Road. Firstly, it compares wave energy and other main energy sources, and then discusses the various disadvantages. It also presents the current research and the difficulties of wave energy evaluation, and systematically analyzes the climatic characteristics of the wave energy, including the temporal–spatial distribution…
- Journal Article:
Ding et al.
Comprehensive analyses of the layout influence on power performance of a low-frequency miniature horizontal-pendulum-type inertial energy harvester for underwater mooring platforms are presented in this article. The mathematical models are obtained utilizing the Newton-Euler method. The power performance is evaluated by simulations over different parameters, such as damping, excitation…
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