Wave energy utilization: A review of the technologies

Falcão, António F. de O.

doi:10.1016/j.rser.2009.11.003

Cited by 2,186 publications

(954 citation statements)

References 71 publications

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“…Of the many ocean energy devices that have been invented, Rosa-Santos et al (2015), López et al (22013), the Oscillating Water Column (OWC) is a particularly attractive proposition. The OWC has been the subject of much dedicated research, Falcão (2010), and is one of the few devices to have been tested at full scale under air chamber, inside which wave action induces air to undergo compressionexpansion cycles thus converting wave energy into pneumatic energy. The OWC is equipped with a power take-off system (PTO), usually consisting of a Wellstype turbine.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamics of an OWC containing real gas

Medina-López

Moñino

Borthwick

et al. 2017

Energy

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Oscillating Water Column (OWC) devices are usually modelled as simple systems containing ideal, dry air. However, high humidity levels are likely to occur in a prototype device open to the sea, particularly in warm climates such as prevail in the lower latitudes. In this paper, a real gas model is implemented to take into account humidity variations inside an OWC chamber. Using a modified adiabatic index, theoretical expressions are derived for the thermodynamic state variables including enthalpy, entropy and specific heat. The model is validated against experimental data, and shown to provide better agreement than obtained using the ideal gas assumption. By calculating real air flow in an OWC it is shown that the mechanical efficiency reduces and the flow phase alters with respect to the ideal gas case. Accurate prediction of efficiency is essential for the optimal design and management of OWC wave energy converters.

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Section: Introductionmentioning

confidence: 99%

Thermodynamics of an OWC containing real gas

Medina-López

Moñino

Borthwick

et al. 2017

Energy

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“…Isso tem levado o recurso da energia das ondas a uma maior proximidade da exploração comercial que, até agora, não tinha sido vista. De 2009 até os dias de hoje, diversos tipos de dispositivos foram desenvolvidos para extração das energias das ondas (Falcão, 2010 O presente trabalho aborda o dispositivo de galgamento mostrado na Fig. 1, cujo princípio de funcionamento baseia-se na acumulação de água em um reservatório sobrelevado em relação ao nível médio da superfície livre do mar.…”

Section: Introductionunclassified

“…A acumulação da água no reservatório sobrelevado dá-se através do galgamento de uma rampa inclinada pela onda (Relatório WavEC, 2004). Destaca-se alguns testes com protótipos apresentados na literatura, como: Wave Dragon (WD), Wave Plane e Seawave Slote-Cone Generator (Falcão, 2010). Destaca-se, também, alguns estudos numéricos: Beels et al (2010) realizaram estudos numéricos a fim de investigar efeitos de esteira atrás de um único dispositivo WD e, também, investigaram a influência de esteira para uma fazenda com cinco WD.…”

Section: Introductionunclassified

Análise Numérica Da Geometria Da Rampa De Um Dispositivo De Galgamento Onshore Em Escala Real Aplicando O Design Construtal

Machado¹,

Santos²,

Isoldi³

et al. 2017

R. bras. Ener. Renov.

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Resumo: O presente trabalho propõe um estudo numérico a respeito de um conversor de energia das ondas do mar do tipo galgamento. O princípio operacional do dispositivo de galgamento consiste de uma estrutura que utiliza uma rampa para direcionar as ondas incidentes para o reservatório. A água armazenada retorna ao oceano após a passagem por uma turbina que está acoplada a um gerador de energia elétrica. O objetivo deste estudo é a aplicação do método Design Construtal, aliado a busca exaustiva, na definição da melhor forma geométrica para a rampa de modo a maximizar a vazão mássica de água que entra no reservatório. O grau de liberdade b/B foi otimizado. A restrição considerada neste estudo é manter fixo: a área total do tanque de ondas, a área da rampa e as características da onda. Para

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“…The ocean wave energy has higher energy density, which enables the devices to extract more power from a smaller volume, limited negative environmental impact and more predictable energy ( [5]). One major category of wave energy converters is the rotating flaps ( [6]). Usually those converters are oscillating about a fixed axis close to the sea bottom and as a result they are suitable for shallow and intermediate water depths.…”

Section: Introductionmentioning

confidence: 99%

Effect of Flap Type Wave Energy Converters on the Response of a Semi-Submersible Wind Turbine in Operational Conditions

Michailides

Luan

Gao

et al. 2014

Volume 9B: Ocean Renewable Energy

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In the present paper the effect of flap type wave energy converters on the response of a floating semi-submersible wind turbine is investigated and reported. Two different layouts with regard to the number of rotating flaps that are utilized are considered and compared with the case of a pure floating semisubmersible wind turbine. Comparisons of response in terms of stability, motions and internal loads are made for selected environmental conditions. The combined operation of the rotating flaps results in an increase of the produced power without affecting significantly selected critical response quantities of the semi-submersible platform.

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Wave energy utilization: A review of the technologies

Cited by 2,186 publications

References 71 publications

Thermodynamics of an OWC containing real gas

Thermodynamics of an OWC containing real gas

Análise Numérica Da Geometria Da Rampa De Um Dispositivo De Galgamento Onshore Em Escala Real Aplicando O Design Construtal

Effect of Flap Type Wave Energy Converters on the Response of a Semi-Submersible Wind Turbine in Operational Conditions

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