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Journal ArticleDOI

Current status of self rectifying air turbines for wave energy conversion

01 Sep 2006-Energy Conversion and Management (Pergamon)-Vol. 47, Iss: 15, pp 2382-2396
TL;DR: In this article, a review of the state of the art on self rectifying air turbines, which could be used for wave energy conversion, has been presented, and the overall performances of the turbines under irregular wave conditions, which typically occur in the sea, have been evaluated numerically and compared from the viewpoints of their starting and running characteristics.
About: This article is published in Energy Conversion and Management.The article was published on 2006-09-01. It has received 221 citations till now. The article focuses on the topics: Wells turbine & Turbine.
Citations
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Journal ArticleDOI
TL;DR: A comprehensive review of wave energy converters and air turbines can be found in this paper, together with a survey of theoretical, numerical and experimental modelling techniques of OWC converters.

594 citations


Cites background from "Current status of self rectifying a..."

  • ...Layout of Masuda's navigation buoy (based on [10])....

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  • ...More recently, Setoguchi and Takao [10], Curran and Folley [11], Falc~ao and Gato [12] and Starzmann [13] published overviews on selfrectifying air turbines....

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  • ...Takao et al. [116] performed a model testing investigation on several self-rectifying air turbines and concluded that impulse turbines are superior to Wells turbines on what concerns noise characteristics....

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  • ...Takao et al. [96] investigated the effect of pitch-controlled (inner and outer) guide vanes, and found an increase up to about 15% in the efficiency in comparison with fixed guide vanes....

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  • ...More recently, Setoguchi and Takao [10], Curran and Folley [11], Falc~ ao and Gato [12] and Starzmann [13] published overviews on selfrectifying air turbines....

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Journal ArticleDOI
TL;DR: In this article, a complete analysis of the wave energy technology is presented, starting with the characterisation of this global resource in which the most suitable places to be exploited are showed, and the classification of the different types of wave energy converters in according to several features.
Abstract: The wave energy is having more and more interest and support as a promising renewable resource to replace part of the energy supply, although it is still immature compared to other renewable technologies. This work presents a complete analysis of the wave energy technology, starting with the characterisation of this global resource in which the most suitable places to be exploited are showed, and the classification of the different types of wave energy converters in according to several features. It is also described in detail each of the stages that are part in the energy conversion, that is, from the capture of the energy from the waves to the extraction of a proper electrical signal to be injected to the grid. Likewise, existing offshore energy transmission alternatives and possible layouts are described.

553 citations

Journal ArticleDOI
TL;DR: In this paper, a 2D numerical model based on the RANS equations and the VOF surface capturing scheme (RANS-VOF) is implemented in order to study the optimum turbine-chamber coupling for a given oscillating water column (OWC) wave energy converter.

192 citations

Journal ArticleDOI
TL;DR: A survey of wave energy converters can be found in this paper, where the most important criteria that have to be kept in mind when designing a WEC are described and evaluated.
Abstract: The utilization of renewable energy sources is a vital aspect for development of sustainability. Currently, an unexploited energy source is ocean waves. Various types of wave energy converters (WECs) are able to transform the motion of the waves into electricity. During the last 30 years, a wide range of prototypes was presented with different rates of success. The aim of this survey is to give an overview of how WECs are categorized [operation principle and power takeoff (PTO) system] and show what are the most important criteria that have to be kept in mind when designing a WEC. A few important WECs are described and evaluated.

159 citations


Cites background from "Current status of self rectifying a..."

  • ...The impulse turbines [25], [26] are self-pitched, controlled...

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Journal ArticleDOI
TL;DR: In this paper, different types of wave energy converters are classified by their mechanical structure and how they absorb energy from ocean waves, and a review of strategies for electrical control of wave EH converters as well as energy storage techniques are presented.
Abstract: Renewable energy techniques are now gaining more and more attention as the years pass by, not only because of the threat of climate change but also, e.g. due to serious pollution problems in some countries and because the renewable energy technologies have matured and can be depended upon an increasing degree. The energy from ocean waves bares tremendous potential as a source of renewable energy, and the related technologies have continually been improved during the last decades. In this paper, different types of wave energy converters are classified by their mechanical structure and how they absorb energy from ocean waves. The paper presents a review of strategies for electrical control of wave energy converters as well as energy storage techniques. Strategies of electrical control are used to achieve a higher energy absorption, and they are also of interest because of the large variety among different strategies. Furthermore, the control strategies strongly affect the complexity of both the mechanical and the electrical system, thus not only impacting energy absorption but also robustness, survivability, maintenance requirements and thus in the end the cost of electricity from ocean waves.

155 citations


Cites methods from "Current status of self rectifying a..."

  • ...These two topologies are utilized to solve the problems above to maximize the instantaneous power output of the wave energy converter: (i) the rotational speed control [38]; (ii) air-flow control strategy....

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References
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Book
01 Jan 1981

364 citations

Journal ArticleDOI
TL;DR: In this article, the performance of a single plane biplane Wells turbine with or without guide vanes is compared with a wave energy device based on the principle of the oscillating water-air column.

286 citations

01 Jan 2002
TL;DR: The LIMPET wave energy device was constructed on the island of Islay, Scotland as mentioned in this paper, which comprises a rectangular inclined OWC that ducts the generated airflow through two contra-rotating Well's turbines, each coupled to a 250kW induction generator giving a 500kW maximum power output.
Abstract: The 2nd full-scale shoreline Oscillating Water Column (OWC) wave energy device to be constructed in the UK, LIMPET, has been completed on the island of Islay, Scotland. The LIMPET device comprises a rectangular inclined OWC that ducts the generated airflow through two contra-rotating Well’s turbines, each coupled to a 250kW induction generator giving the device a 500kW maximum power output. This paper serves to provide an overview of the LIMPET device from conception to the current status and the initial operational experiences of running the plant.

114 citations

Journal ArticleDOI
TL;DR: In this paper, the aerodynamic performance of the Wells turbine was investigated using a streamline curvature throughflow method and compared with analytically obtained results from a linear actuator disk model.

93 citations

01 Jan 2002
TL;DR: The Mighty Whale is a floating wave power device based on the Oscillating Water Column (OWC) principle, which converts wave energy into electric energy, and produces a relatively calm sea area behind.
Abstract: Mighty Whale is a floating wave power device based on the Oscillating Water Column (OWC) principle. It converts wave energy into electric energy, and produces a relatively calm sea area behind. The open sea tests were begun in September 1998 in Gokasho Bay, Nansei Town, Mie Prefecture. Measurements collected since then include performance data in typhoon seasons. This paper presents the measurements of wave energy absorption, floating body motion, and wave height dissipation. It is expected that these results will be useful in the design of offshore wave power devices in the future.

78 citations