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Studies regarding renewable energy sources have gained attention over recent years. One example is wave energy converters, which harvest energy from sea waves using different operational principles such as oscillating water columns, oscillating bodies, and overtopping devices. In the present paper, a numerical study is carried out, and a geometrical investigation of a full-scale overtopping device with a coupled structure mounted on the seabed is performed using the Constructal Design method. The main purpose is to investigate the influence of the design over the available power of the device. The areas of the overtopping ramp (Ar) and the trapezoidal seabed structure (At) are the problem constraints. Two degrees of freedom are studied, the ratio between the height and length of the ramp (H3/L3) and the ratio between the upper and lower basis of the trapezoidal obstacle (L1/L2). The device submersion is kept constant (H1 = 3.5 m). The equations of continuity, momentum, and the transport of volume fraction are solved with the Finite Volume Method, while the water–air mixture is treated with the multiphase model Volume of Fluid. Results showed that the ratio H3/L3 presented a higher sensibility than the ratio L1/L2 over the accumulated water in the reservoir. Despite that, the association of a structure coupled to the ramp of an overtopping device improved the performance of the converter by 30% compared to a conventional condition without the structure.

O presente estudo visa a análise de produção e autoria de artigos científicos acerca da utilização do dispositivo para conversão de energia das ondas do mar em energia elétrica do tipo galgamento através da Metodologia Bibliométrica. O presente estudo deu-se através de artigos selecionados a partir de anais de congressos e periódicos nacionais e internacionais. O princípio de funcionamento deste dispositivo baseia-se na acumulação de água em um reservatório sobrelevado em relação ao nível da superfície livre do mar, a água acumulada então retorna ao mar, acionando turbinas hidráulicas de baixa queda que estão acopladas a geradores elétricos. Este trabalho faz uso da bibliometria, a qual é uma ferramenta estatística que permite quantificar a medição de índices de produção. Utilizando palavras-chave selecionadas, realizou-se um levantamento de artigos nas bases de dados online Science Direct, Scielo e Scholar, os arquivos encontrados passaram então por um processo de filtragem, a fim de limitar o estudo bibliométrico aos artigos de interesse, isto é, foram selecionados apenas estudos a respeito de dispositivos de galgamento enquanto conversores de energia das ondas do mar em energia elétrica. Por fim, executou-se a investigação dos documentos remanescentes sobre a óptica do estudo de produção e autoria, identificando o crescimento nas publicações acerca do assunto, os autores mais prolíferos e as instituições de filiação destes.

The present study aims to analyze the state of the art of scientific studies about the Overtopping device used to convert sea wave energy into electrical energy, by means the Bibliometric Methodology. The development of this study took place through the selection of articles from conference proceedings, as well as national and international journals. The Bibliometric methodology consists of a statistical tool that allows quantifying the measurement of production indexes. Using selected keywords, it was conducted a survey of studies in the online databases of Science Direct, SciELO and Google Scholar. The works found then went through a filtering process, in order to limit the bibliometric study only to studies about Overtopping devices as sea wave energy converter. Finally, the investigation of these selected articles was carried out under the optics of production and authorship study, content study and study of bibliographic references. Where it was identified growth in publications related to the topic, methodologies used and, among other indicators, the authors most cited in the analyzed articles. The predominant keywords used were “Wave Energy Converter” and “Overtopping”. It was noted that Brazilian universities are leaders in the productivity, presenting more than 36% of the scientific production regarding Overtopping WECs.

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