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Cost-Effective Optimization of an Array of Wave Energy Converters in Front of a Vertical Seawall

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  • Senthil Kumar Natarajan

    (Department of Ocean System Engineering, Jeju National University, Jeju 690-756, Republic of Korea)

  • Il Hyoung Cho

    (Department of Ocean System Engineering, Jeju National University, Jeju 690-756, Republic of Korea)

Abstract

The present paper focuses on investigating the cost-effective configuration of an array of wave energy converters (WECs) composed of vertical cylinders situated in front of a vertical seawall in irregular waves. First, the hydrodynamic calculations are performed using a WAMIT commercial code based on linear potential theory, where the influence of the vertical wall is incorporated using the method of image. The viscous damping experienced by the oscillating cylinder is considered through CFD simulations of a free decay test. A variety of parameters, including WEC diameter, number of WECs, and the spacing between them, are considered to determine an economically efficient WEC configuration. The design of the WEC configuration is aided by a cost indicator, defined as the ratio of the total submerged volume of the WEC to overall power capture. The cost-effective configuration of WECs is achieved when WECs are positioned in front of a vertical wall and the distance between them is kept short. It can be explained that the trapped waves formed between adjacent WECs as well as the standing waves in front of a seawall significantly intensify wave fields around WECs and consequently amplify the heave motion of each WEC. A cost-effective design strategy of WEC deployment enhances the wave energy greatly and, consequently, contributes to constructing the wave energy farm.

Suggested Citation

  • Senthil Kumar Natarajan & Il Hyoung Cho, 2023. "Cost-Effective Optimization of an Array of Wave Energy Converters in Front of a Vertical Seawall," Energies, MDPI, vol. 17(1), pages 1-21, December.
    • Handle: RePEc:gam:jeners:v:17:y:2023:i:1:p:128-:d:1307385
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    References listed on IDEAS

    as
    1. Enrico Giglio & Ermando Petracca & Bruno Paduano & Claudio Moscoloni & Giuseppe Giorgi & Sergej Antonello Sirigu, 2023. "Estimating the Cost of Wave Energy Converters at an Early Design Stage: A Bottom-Up Approach," Sustainability, MDPI, vol. 15(8), pages 1-39, April.
    2. Senthil Kumar Natarajan & Ilhyoung Cho, 2023. "New Strategy on Power Absorption of a Concentric Two-Body Wave Energy Converter," Energies, MDPI, vol. 16(9), pages 1-20, April.
    3. Guo, Bingyong & Ringwood, John V., 2021. "Geometric optimisation of wave energy conversion devices: A survey," Applied Energy, Elsevier, vol. 297(C).
    4. Garcia-Teruel, A. & Forehand, D.I.M., 2021. "A review of geometry optimisation of wave energy converters," Renewable and Sustainable Energy Reviews, Elsevier, vol. 139(C).
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