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Analytical study of the interaction between waves and cylindrical wave energy converters oscillating in two modes

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  • Heikkinen, Heidi
  • Lampinen, Markku J.
  • Böling, Jari

Abstract

Ocean wave energy may be recovered by oscillating wave energy converters. The energy converter studied in this work is a horizontally orientated cylinder which can be placed at different depths in the sea. The cylinder can oscillate in horizontal and vertical directions and transfer mechanical energy forward by hydraulic cylinders. To study the interaction between the waves and the converter, we have used potential flow theory separately for both the waves and the oscillating cylinder, and then combined these potential functions by using the principle of superposition. Combined potential flow fields, together with Euler’s equations, enable us to obtain the pressure distribution around the cylinder. When knowing the pressure distribution, both the force upon the cylinder, and the net mechanical power transferred from the waves to the moving cylinder, can be calculated. With this model we have analyzed several interesting topics which affect the efficiency of the wave energy converter. The phase shift is the most important parameter – with the phase shift -π/2 the best efficiency 0.5 was achieved. To achieve the right phase shift for different waves is essential due to the power capture. Furthermore, it is shown that feedback control is necessary for keeping the phase shift constant. Also the cylinder radius has a great effect on the efficiency. The other important parameters studied in this work were the wave height and the wave period.

Suggested Citation

  • Heikkinen, Heidi & Lampinen, Markku J. & Böling, Jari, 2013. "Analytical study of the interaction between waves and cylindrical wave energy converters oscillating in two modes," Renewable Energy, Elsevier, vol. 50(C), pages 150-160.
    • Handle: RePEc:eee:renene:v:50:y:2013:i:c:p:150-160
    DOI: 10.1016/j.renene.2012.06.023
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    References listed on IDEAS

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    1. Babarit, A. & Hals, J. & Muliawan, M.J. & Kurniawan, A. & Moan, T. & Krokstad, J., 2012. "Numerical benchmarking study of a selection of wave energy converters," Renewable Energy, Elsevier, vol. 41(C), pages 44-63.
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    Cited by:

    1. Shahabi-Nejad, Meysam & Nikseresht, Amir H., 2022. "A comprehensive investigation of a hybrid wave energy converter including oscillating water column and horizontal floating cylinder," Energy, Elsevier, vol. 243(C).
    2. Tri, Nguyen Minh & Truong, Dinh Quang & Thinh, Do Hoang & Binh, Phan Cong & Dung, Dang Tri & Lee, Seyoung & Park, Hyung Gyu & Ahn, Kyoung Kwan, 2016. "A novel control method to maximize the energy-harvesting capability of an adjustable slope angle wave energy converter," Renewable Energy, Elsevier, vol. 97(C), pages 518-531.
    3. Ghasemi, Amirmahdi & Anbarsooz, Morteza & Malvandi, Amir & Ghasemi, Amirhossein & Hedayati, Faraz, 2017. "A nonlinear computational modeling of wave energy converters: A tethered point absorber and a bottom-hinged flap device," Renewable Energy, Elsevier, vol. 103(C), pages 774-785.
    4. Weiming Zhai & Ming Liu & Changjiu Huang & Daoxi Cheng & Lei Tan, 2023. "Large Eddy Simulation of Flow Characteristics around Cylinders with Crosswise and Streamwise Arrangements in Ocean Energy," Energies, MDPI, vol. 16(22), pages 1-19, November.
    5. Ylänen, Markus M.M. & Lampinen, Markku J., 2014. "Determining optimal operating pressure for AaltoRO – A novel wave powered desalination system," Renewable Energy, Elsevier, vol. 69(C), pages 386-392.
    6. Tatiana Potapenko & Joseph Burchell & Sandra Eriksson & Irina Temiz, 2021. "Wave Energy Converter’s Slack and Stiff Connection: Study of Absorbed Power in Irregular Waves," Energies, MDPI, vol. 14(23), pages 1-21, November.
    7. Ozkop, Emre & Altas, Ismail H., 2017. "Control, power and electrical components in wave energy conversion systems: A review of the technologies," Renewable and Sustainable Energy Reviews, Elsevier, vol. 67(C), pages 106-115.
    8. Satyabrata Saha & Mrinmoy Majumder & Manish Pal, 2021. "Identification of the probability of the park effect in a wave-to-power system using the analytical hierarchical process and a polynomial neural network model," Environment, Development and Sustainability: A Multidisciplinary Approach to the Theory and Practice of Sustainable Development, Springer, vol. 23(12), pages 17403-17422, December.
    9. Anbarsooz, M. & Passandideh-Fard, M. & Moghiman, M., 2014. "Numerical simulation of a submerged cylindrical wave energy converter," Renewable Energy, Elsevier, vol. 64(C), pages 132-143.

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