The Experts below are selected from a list of 321 Experts worldwide ranked by ideXlab platform
Wanan Sheng - One of the best experts on this subject based on the ideXlab platform.
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Wave Energy Conversion and hydrodynamics modelling technologies: A review
Renewable & Sustainable Energy Reviews, 2019Co-Authors: Wanan ShengAbstract:Abstract It has been well accepted that Wave Energy may have the potential to significantly contribute to the future renewable Energy mix but so far it remains as the largest untapped renewable resources since the current Wave Energy technologies are technically immature for reliable and economic Energy production. The greatest challenges would be how the performance of Wave Energy converters can be reliably assessed and how the Wave Energy Conversion efficiency can be improved. These two challenges are strongly linked, with the former producing the required tools for the latter, which is a critical part for reducing the overall cost of Wave Energy production. For understanding the issues involved in Wave Energy Conversion, the relevant Energy Conversion technologies are discussed, with a focus on hydrodynamics modelling for the Wave Energy converters. To achieve the goal, the review presents the fundamental understandings to Wave Energy Conversions and the descriptions and discussions are made for what are the challenges in Wave Energy development, how the reliable numerical and physical modelling techniques for Wave Energy converters can be carried out, and how to optimise the power take-off and Wave Energy devices for improving Wave Energy Conversion. Particularly, the issues with the hydrodynamics modelling are discussed in details, including the important issues with the control technologies and the end-stop problems.
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on improving Wave Energy Conversion part i optimal and control technologies
Renewable Energy, 2015Co-Authors: Wanan Sheng, Raymond Alcorn, Anthony LewisAbstract:Abstract Extracting Wave Energy from seas has been proven to be very difficult although various technologies have been developed since 1970s. Among the proposed technologies, only few of them have been actually progressed to the advanced stages such as sea trials or pre-commercial sea trial and engineering. One critical question may be how we can design an efficient Wave Energy converter or how the efficiency of a Wave Energy converter can be improved using optimal and control technologies, because higher Energy Conversion efficiency for a Wave Energy converter is always pursued and it mainly decides the cost of the Wave Energy production. In the first part of the investigation, some conventional optimal and control technologies for improving Wave Energy Conversion are examined in a form of more physical meanings, rather than the purely complex mathematical expressions, in which it is hoped to clarify some confusions in the development and the terminologies of the technologies and to help to understand the physics behind the optimal and control technologies. And as a result of the understanding of the physics and the principles of the optima, a new latching technology is proposed, in which the latching duration is simply calculated from the Wave period, rather than that based on future information/prediction, hence the technology could remove one of the technical barriers in implementing latching control technology. From the examples given in the context, this new latching control technology can achieve a phase optimum in regular Waves, and hence significantly improve Wave Energy Conversion. Further development on these latching control technologies in irregular Waves can be found in the second part of the investigation.
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On improving Wave Energy Conversion, part II: Development of latching control technologies
Renewable Energy, 2015Co-Authors: Wanan Sheng, Raymond Alcorn, Anthony LewisAbstract:Abstract In the first part of the investigation, a new latching control technology is proposed, and it has been shown that the new latching control technique is capable of greatly improving Wave Energy Conversion in regular Waves. In this part of the research, a new analysis technique is developed for studying the latching control technology. A ‘time-out’ method is developed and employed for ‘re-packing’ the dynamic system, hence the analysis of the latching control technology can be changed from a complete nonlinear dynamics into a simple linear dynamic system, and it is further proven that the ‘re-packed’ dynamic system can be transformed back to frequency domain for further analysis. In the research, we could prove how the phase optimal condition can be attained. Further on, the new latching control technology will be used in irregular Waves. Unlike many other latching control technologies, the new latching control does not need the detailed future information. In the development of the technology, we will show how we can obtain the latching duration for irregular Waves for improving Wave power extraction. As a result, we could remove one barrier in implementing latching control strategy while the Wave Energy Conversion can still be much improved.
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Numerical Assessment on Primary Wave Energy Conversion of Oscillating Water Columns
Volume 9A: Ocean Renewable Energy, 2014Co-Authors: Wanan Sheng, Raymond Alcorn, Tony LewisAbstract:Oscillating water column (OWC) Wave Energy converters (WECs) are probably the simplest and most promising Wave Energy converters due to their good feasibility, reliability and survivability in practical Wave Energy Conversions and also regarded as the most studied and developed when compared to other types of the Wave Energy converters.This research aims to develop a reliable numerical tool to assess the performance of the OWC Wave Energy converters, particularly in the primary Wave Energy Conversion. In the numerical assessment tool, the hydrodynamics of the device and thermodynamics of the air chamber can be studied separately. However, for the complete dynamic system when a power takeoff (PTO) system is applied, these two dynamic systems are fully coupled in time-domain, in which the PTO can have a simple mathematical expression as the relation between the pressure difference across the PTO (the chamber pressure) and its flowrate through the PTO. And the application of a simple PTO pressure-flowrate relation very much simplifies the complicated aerodynamics and thermodynamics in the air turbine system so the whole dynamic system can be simplified.The methodology has been applied to a generic OWC device and the simulation results have been compared to the experimental data. It is shown that the developed numerical method is reliable in and capable of assessing the primary Wave Energy Conversion of oscillating water columns.Copyright © 2014 by ASME
Henk Polinder - One of the best experts on this subject based on the ideXlab platform.
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direct drive Wave Energy Conversion systems an introduction
Electrical Drives for Direct Drive Renewable Energy Systems, 2013Co-Authors: M Prado, Henk PolinderAbstract:Abstract: This chapter introduces the application of direct drive machines in Wave Energy Conversion. Wave Energy as a renewable resource is described, together with the principles and the challenges behind its capture and Conversion. An overview of direct drive in Wave Energy is then presented, with a discussion of the current limitations and possible solutions.
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Direct drive in Wave Energy Conversion — AWS full scale prototype case study
2011 IEEE Power and Energy Society General Meeting, 2011Co-Authors: M Prado, Henk PolinderAbstract:This paper addresses the application of direct drive machines in Wave Energy Conversion, with special focus on the AWS full scale prototype tested offshore Portugal in 2004. A short introduction to Wave Energy is given, describing its features as a renewable resource, the principles and the challenges behind its capture and Conversion. The AWS Wave Energy Conversion concept is described, as well it's full scale prototype design process, construction and installation. Furthermore, experimental results from offshore tests are presented.
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Linear generator systems for Wave Energy Conversion
2007Co-Authors: Henk Polinder, Mueller, M. Scuotto, M. Goden De Sousa PradoAbstract:The objective of this paper is to review linear generator systems for Wave Energy Conversion and the research issues related to this. The paper starts with a short review of Wave Energy Conversion, indicating that the different Wave Energy Conversion systems that have been presented in literature have very different generator systems. Next, a few state-of-the-art linear generator systems are discussed, such as the linear generator of the Archimedes Wave Swing (AWS) and the linear generator developed in Uppsala. Subsequently, some remaining problems and possible solutions that need further research are listed. The paper concludes with some sensible directions for further research, such as investigating an increase of the speed of the linear motion of the Wave Energy converter, investigating other generator types with higher force densities and possibly better efficiencies (for example, transverse flux permanent magnet machines) and investigating generator constructions that result in cheaper generators.
Maurizio Scarano - One of the best experts on this subject based on the ideXlab platform.
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A Tubular-Generator Drive For Wave Energy Conversion
IEEE Transactions on Industrial Electronics, 2006Co-Authors: V.d. Colli, P. Cancelliere, Fabrizio Marignetti, R. Di Stefano, Maurizio ScaranoAbstract:This paper illustrates the operation of a tubular-machine drive as a linear generator for a heave-buoy Wave Energy Conversion. Linear generators, which are adopted in marine power plants, offer the advantage of generating without introducing any Conversion crank gear or hydraulic system. The use of a tubular-machine topology allows the electromagnetic thrust density to be improved. This paper briefly summarizes the principles of marine Wave buoy interaction and reports the design analysis and control of a permanent-magnet (PM) synchronous tubular linear machine based on a scaled generator prototype and on a rotating simulation test bench
Wei Xu - One of the best experts on this subject based on the ideXlab platform.
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Progress in Piezoelectric Material Based Oceanic Wave Energy Conversion Technology
IEEE Access, 2020Co-Authors: Mahbubur Rahman Kiran, Omar Farrok, Md. Abdullah-al-mamun, Md. Rabiul Islam, Wei XuAbstract:Recently, electrical engineers are paying great attention to develop oceanic Wave Energy Conversion technologies based on the piezoelectric materials because of their excellent conveniences. Piezoelectric oceanic Wave Energy converters (OWECs) have several benefits over the others such as its small size, lightweight, no requirement of using intermediate device as well as having less negative impacts on the oceanic environment. Various review and research papers focus on the piezoelectric devices, their operation and application for oceanic Energy Conversion. But, to the best of the authors’ knowledge, none of the existing research or review papers present detailed scheme of piezoelectric device based power generation covering all the relevant topics as depicted in this review. This article focuses different aspects of piezoelectric device based oceanic Wave Energy Conversion technology including prospect, historical development, classification, operating principle, configuration, arrangement, model, processing, post-processing, and their test setups. In addition, technical challenges, future direction of research and critical review are also illustrated. It is assumed that, this article would play a significant role for the future development of piezoelectric OWECs and the researcher working in this field.
Marco Trapanese - One of the best experts on this subject based on the ideXlab platform.
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A Permanent Magnet Linear Generator for the Enhancement of the Reliability of a Wave Energy Conversion System
IEEE Transactions on Industrial Electronics, 2019Co-Authors: Marco Trapanese, Giovanni Cipriani, Valeria Boscaino, Domenico Curto, Vincenzo Di Dio, Vincenzo FranzittaAbstract:In this paper, a linear generator for a highly reliable Wave Energy Conversion system is designed and tested. In order to store Energy, the system is able to produce hydrogen. The Wave Energy Conversion system consists of an electrical linear generator, a power Conversion system, and a sea-water electrolyzer. A small-scale prototype of the system is designed and built. The design is oriented to the enhancement of the system robustness and reliability and a failure mode and effects and criticality analysis are used. In order to guarantee an easy extension of the power capability of the marine plant, a modular architecture of the system is adopted. The design strategy is described. The robustness and reliability of the proposed solution are discussed. Simulation and experimental results on the prototype are shown.
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A general comparison between various types of linear generators for Wave Energy Conversion
2017Co-Authors: Marco Trapanese, Giovanni Cipriani, M. Corpora, V. Di DioAbstract:This paper presents a general comparison between various types of linear generators for Wave Energy Conversion. According to the type of magnetic configuration they are distinguished as: linear asynchronous generators, linear generators with permanent magnets and linear reluctance generators. The paper shows their peculiarities and discusses their field of applications.
