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- Conference Paper:
Mohamed et al.
Now-a-days, the energy extraction and conversion from the ocean waves has attracted large attention. A number of wave energy conversion systems have been proposed to convert the mechanical energy of the ocean wave into electrical energy. This paper presents a review of the status of wave energy conversion (WEC) technology and discusses the different types of devices used in present power…
- 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…
- Conference Paper:
Song et al.
The efficiency in a horizontal axis tidal turbine (HATT), ??, is the determinant factor for tidal energy system. Accordingly, predicting the ?? of tidal turbines in the real sea environment is critical important to achieve the maximum performance of HATTs. However this performance is under great threat caused by marine fouling. And the understanding of the fouling effect is still barely known…
- 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…
- Conference Paper:
Choi et al.
This paper proposes new control method of maximum power point tracking for the tidal energy generation system using the duty ratio control of buck type DC-DC converter. An advantage of new MPPT(Maximum Power Point Tracking) control method presented in this paper is not necessary to use the tidal turbine characteristic at various tidal speed and measure the tidal speed or/and the rotation speed…
- Conference Paper:
Repi and Diputra
Nowadays, the need of harnessing renewable and sustainable energies is getting higher. As a maritime country, with about one-third of its territory, is the ocean, Indonesia has a considerable amount of ocean energy including ocean wave energy. Therefore, there’s a need for doing research and development pertaining to ocean wave energy. In this modern era, simulation has become a major and…
- Conference Paper:
Rocha et al.
The shelving of the seabed and funneling of the water by the estuaries is favorable for tidal impoundment technologies. In this work, the estimation of the tidal potential energy for Ria de Aveiro lagoon was achieved through the application of a model developed in the Delft3D software. This software can reproduce the hydrodynamics of this complex system and simulations were run to identify hot…
- Conference Paper:
Espina-Valdes et al.
In this research, the influence of blade geometry on the power stage characterization of cross-flow hydrokinetic turbines and vertical axis under conditions of low current velocity (<1 m/s) has been studied. To carry out the characterization of the power stage, two turbines have been used. The first has three straight blades and corresponds to a SC-Darrieus-type rotor, while the second has…
- Conference Paper:
Polinder and Scuotto
The objective of this paper is to give an introduction into ocean wave energy converters and their impact on power systems. The potential of wave energy is very large. There are a lot of different methods and systems for converting this power into electrical power, such as oscillating water columns, hinged contour devices as the Pelamis, overtopping devices as the wave dragon and the…
- Conference Paper:
Sarkar et al.
This paper investigates the behaviour of a bottom hinged flap-type wave energy converter (WEC), namely the Oscillating Wave Surge Converter (OWSC), in random seas. The semi-analytical model of Renzi and Dias (2013b) for an OWSC in the open ocean is considered to analyze the performance of the device in random incident waves. The modelling is performed within the framework of a linear potential…
- Conference Paper:
Henry et al.
This paper describes a series of experiments undertaken to investigate the slamming of an Oscillating Wave Surge Converter in extreme sea states. These two-dimensional experiments were undertaken in the Wave Flume at Ecole Centrale Marseille. Images from a high speed camera are used to identify the physics of the slamming process. A single pressure sensor is used to record the characteristic…
- Conference Paper:
Abidin et al.
Ocean Thermal Energy Conversion (OTEC) harnesses thermal energy stored at different seawater depths via power generation from a thermodynamic closed-loop cyclical system. Apart from its consistent energy generation, it could be diversified into other side industries, making OTEC an attractive and sustainable source of renewable energy. However, the process that utilises seawater as its main…
- Conference Paper:
Halimi and Generanta
Nowadays, the energy demand is continuous increasing due to the growing population in the world. However, the major primary energy resources, fossil fuels, are inadequate. Thus, it is required to find another energy resources, especially the renewable ones, to meet the energy demand. One of prospective renewable energy resources is marine energy. In this paper, an ammonia-water zeotropic…
- Conference Paper:
Bellew et al.
As the depths of sites consented for offshore wind increases, the need to develop floating foundations for wind turbines increases, as fixed foundations are only economically viable up to approximately 50 m water depth [2]. Key to developing the floating wind turbine industry is the development of accurate numerical models, which can combine the aerodynamic, hydrodynamic, structural…
- Conference Paper:
Vining et al.
A versatile doubly-fed linear generator was recently presented for application in the point absorber ocean wave energy converter (WEC). While this machine may be operated as a singly- or doubly-fed induction machine or via a self-synchronous approach, operation as a synchronous machine is found to be an attractive method for experimental testing. Using this mode of operation, the generator may…
- Conference Paper:
Zhang et al.
Ocean Wave energy is a very appealing renewable energy source. This paper reviews various novel linear generator concepts and topologies for wave energy conversion, including novel permanent magnet linear generators, flux modulated linear generators, linear reluctance generators, emerging superconducting linear generators, and doubly fed linear generators.
- Conference Paper:
Kelly and Alam
The ocean is full of untapped energy, however it is a wild place where harsh conditions can occur that can damage wave energy converters (WEC’s). During high load conditions, many WEC’s must go into survival mode to prevent damage or are overdesigned to continue operating in high sea states, which can increase capital costs. The authors propose a different approach, where geometry control is…
- Conference Paper:
Vining et al.
This paper presents the design, construction, and testing of a double-sided, dual airgap linear Vernier generator for wave energy conversion. Both the electromagnetic as well as mechanical design concepts are explored with a particular emphasis on the mechanical aspect given the fact that maintaining a dual airgap for this topology is challenging and has not been previously implemented.
- Conference Paper:
Mundon et al.
This paper presents a hybrid drivetrain concept developed specifically for wave energy applications. The drivetrain comprises a hydrostatic hydraulic front end coupled to Vernier linear generator in such a fashion as to provide the advantages of both a hydraulic drivetrain and a direct-drive electrical system, while improving on the efficiency of both. In addition to the concept and…
- Conference Paper:
Mundon et al.
The hydrodynamic forces acting on an oscillating multi-degree-of-freedom wave energy converter reaction body are characterized using scaled experiments and CFD simulations. Curves indicating how the hydrodynamic coefficients vary with Keulegan-Carpenter number (KC) and Reynolds number (Re) at four different scales, ranging from 1:75 to 1:36, are presented for multiple degrees of freedom.…
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