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NUMERICAL ANALYSIS OF THE FLUID-DYNAMIC BEHAVIOR OF A SUBMERGED PLATE WAVE ENERGY CONVERTER

Volume 6, Issue 6, 2014, pp. 525-534
DOI: 10.1615/ComputThermalScien.2014010456
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ABSTRACT

The need for clean and renewable energy sources has nowadays contributed to give relevance to the study of sea wave energy. In this context, the present work brings a computational modeling to analyze the fluid-dynamic behavior of a submerged plate wave energy converter. Basically, its operating principle consists in the passage of sea waves through a horizontal submerged plate, generating a flow under it where a turbine is placed, converting mechanical energy into electrical energy. The numerical model uses the software GAMBIT and FLUENT. In the latter, which is based on the finite volume method (FVM), the methodology used to represent the air−water interaction in the numerical simulations of the device is the multiphase volume of fluid (VOF) method. The objective of this paper is to analyze the influence of the opening ratio under the submerged plate with regard to its efficiency. To do so, the model, after verification and validation processes, was used in six simulations that differ from each other only in the vertical position of the plate in a wave tank. Results showed that a 5% increase in the opening ratio may produce an approximately 93% increase in the efficiency of the converter. In addition, a physical restriction was inserted under the plate, representing the pressure drop caused by a turbine, and other cases were simulated. These results indicate that a reduction of around 76% in the free region under the plate causes a decrease of only 5.5% in the submerged plate efficiency.

CITED BY
  1. Windt Christian, Davidson Josh, Ringwood John V., High-fidelity numerical modelling of ocean wave energy systems: A review of computational fluid dynamics-based numerical wave tanks, Renewable and Sustainable Energy Reviews, 93, 2018. Crossref

  2. das N. Gomes M., Lorenzini G., Rocha L. A. O., dos Santos E. D., Isoldi L. A., Constructal Design Applied to the Geometric Evaluation of an Oscillating Water Column Wave Energy Converter Considering Different Real Scale Wave Periods, Journal of Engineering Thermophysics, 27, 2, 2018. Crossref

  3. Gomes Mateus das Neves, Espinel Lara Maria Fernanda, Iahnke Silvana Letícia Pires, Neves Machado Bianca, Moraes Goulart Marcelo, Medeiros Seibt Flávio, dos Santos Elizaldo Domingues, Isoldi Liércio André, Rocha Luiz Alberto Oliveira, Numerical Approach of the Main Physical Operational Principle of Several Wave Energy Converters: Oscillating Water Column, Overtopping and Submerged Plate, Defect and Diffusion Forum, 362, 2015. Crossref

  4. Kharati-Koopaee Masoud, Kiali-Kooshkghazi Mehdi, Assessment of Plate-Length Effect on the Performance of the Horizontal Plate Wave Energy Converter, Journal of Waterway, Port, Coastal, and Ocean Engineering, 145, 1, 2019. Crossref

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