Influence of slot width on the performance of multi-stage overtopping wave energy converters

Jungrungruengtaworn, Sirirat; Hyun, Beom-Soo

doi:10.1016/j.ijnaoe.2017.02.005

Cited by 21 publications

(9 citation statements)

References 11 publications

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“…It should also be noted that this field of investigation is still quite new and under the development, which means that there are some other known and/or unknown factors, in which their influences on the hydraulic efficiency should be or are being studied. For instance, Jungrungruengtaworn and Hyun 14 studied the influence of the width of the slots and reported that the effect of adaptive slot width on the performance of the system is negligible.…”

Section: Methodsmentioning

confidence: 99%

Feasibility assessment for installing Sea-wave Slot-cone Generator breakwater in the Iranian coasts of Persian Gulf and Oman Sea

Rahbani

Mohammadi

2017

Energy & Environment

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The applicability of Sea-wave Slot-cone Generator breakwater as a system of energy converter in the southern coasts of Iran is investigated. Several efficient factors simultaneously have been considered, including the period and the significant height of wave, the effective depth, and the hydraulic efficiency. The field data used in this study are those derived from the stationary buoys. Findings reveal that Asaluyeh and Shahid-Beheshti ports are the only places, which might satisfy the required needs. The percentage of hydraulic efficiency achieved, however, is less than what is suggested in the literature as the minimum acceptable level. In other words, the use of Sea-wave Slot-cone Generator breakwater is not financially affordable in the southern coasts of Iran.

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Section: Methodsmentioning

confidence: 99%

Feasibility assessment for installing Sea-wave Slot-cone Generator breakwater in the Iranian coasts of Persian Gulf and Oman Sea

Rahbani

Mohammadi

2017

Energy & Environment

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“…O espectro de Pierson-Moskowitz foi empregado no presente estudo, sendo a densidade espectral, forma pela qual melhor pode-se comparar o espectro numérico com o analítico, dada por Chakrabarti (2005) [23]: 1 (10) onde H S é a altura significativa da onda (m); P frequência de pico da onda (rad/s) e frequência da onda (rad/s).…”

Section: Espectro De Ondas -Pierson-moskowitz (Pm)unclassified

“…A água então escoa por uma turbina de baixa queda retornando ao mar [2]. Alguns dos estudos sobre o dispositivo de galgamento realizados mais recentes abordaram sobre a avaliação experimental de parâmetros do dispositivos [3,4,5,6]; trabalhos numéricos [7,8,9,10] e com aplicação do método Design Construtal para avaliação geométrica [11,12,13,14,15].…”

Section: Introductionunclassified

Comparação entre dispositivos de galgamento costeiro com rampa única e com rampa dupla empregando espectro de ondas e design construtal

et al. 2019

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Estudos sobre formas alternativas de geração de energia elétrica vêm aumentado nos últimos anos. Os conversores de energia das ondas (wave energy converter - WEC) são uma destas formas, dentre elas o dispositivo de galgamento destaca-se por seu princípio de funcionamento. No presente trabalho é avaliado geometricamente um dispositivo de galgamento com rampa dupla, com a finalidade de maximizar a potência disponível ((Pd)m), este resultado é então comparado com o obtido para um dispositivo com rampa única, este referente a um trabalho encontrado na literatura. O método Design Construtal é usado na avaliação geométrica (determinação de um campo de busca) e o método Busca Exaustiva para a otimização. Para a geração da onda se utilizou o espectro de ondas Pierson-Moskowitz (PM), com período de onda e altura significativa de, respectivamente, TS = 7,5 s e HS = 1,5 m. As dimensões das rampas do dispositivo são obtidas em relação a fração de área da rampa (ϕ1 = 0,0006; 0,0009; 0,0012 e 0,0015; e ϕ2 = 0,0006, além das razões entre as alturas e comprimentos das rampas iguais: H1/L1 = 0,3 e H2/L2 = 0,2 e 0,3. Os resultados mostram que, para o dispositivo com rampa dupla, a aplicação do Design Construtal foi importante para avaliação geométrica, possibilitando determinar a potência disponível máxima para as condições impostas. Porém, em comparação com o dispositivo com rampa única, este mostrou-se uma opção melhor

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“…However, in relation to the numerical work, can cite: Margheritini et al (2012), Nørgaard and Andersen (2012), Barbosa et al (2017) and Jungrungruengtaworn and Hyun (2017).…”

Section: Introductionmentioning

confidence: 97%

Geometric Evaluation Using Constructal Design of a Coastal Overtopping Device With Double Ramp Considering a Regular Wave and Tidal Variation

Martins

Goulart

Isoldi

et al. 2019

RETERM

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Concern for the environment and new ways of electricity generation, have led to studies of renewable energy sources, among these the Wave Energy Converters (WECs) are an option, however there are still many challenges to define how best to realize the conversion of the energy of the waves into electricity. In this work, a numerical study was carried out with the purpose of maximizing the available power (Pd) of a two-ramp overtopping device, considering the area fraction of ramps (ϕ1 and ϕ2) equal to 0.0006 and the ratio between height and length of the ramps (H1/L1 = H2/L2) equal to 0.3. The distance between the ramps (Lg) was varied in three values: 1.0; 1.5 and 2.0 m, besides three values for the free surface of water (h): 9.8; 10.0 and 10.2 m; simulating a tidal effect. The Constructal Design and Exhaustive Search methods were used, respectively, in the geometric evaluation (determination of a search field) and optimization. For the wave generation, the Second Order Stokes Theory was used, with wave period (T) of 7.5 s and wave height (H) 1.0 m. The results showed that there was no accumulation of water in the upper ramp of the device, in addition, with the increase of Lg there was an increase of Pd in h = 10.0 and 10.2 m, and Pd kept practically constant in h = 9, 8 m. And, as expected, with increasing of h, there was an increase in Pd.

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Influence of slot width on the performance of multi-stage overtopping wave energy converters

Cited by 21 publications

References 11 publications

Feasibility assessment for installing Sea-wave Slot-cone Generator breakwater in the Iranian coasts of Persian Gulf and Oman Sea

Feasibility assessment for installing Sea-wave Slot-cone Generator breakwater in the Iranian coasts of Persian Gulf and Oman Sea

Comparação entre dispositivos de galgamento costeiro com rampa única e com rampa dupla empregando espectro de ondas e design construtal

Geometric Evaluation Using Constructal Design of a Coastal Overtopping Device With Double Ramp Considering a Regular Wave and Tidal Variation

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