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Design tradeoffs of an oil-hydraulic power take-off for wave energy converters

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  • Gaspar, José F.
  • Calvário, Miguel
  • Kamarlouei, Mojtaba
  • Soares, C. Guedes

Abstract

This paper presents the main design tradeoffs that should be handled when developing oil-hydraulic Power Take-Off devices aiming at the maximization of energy extraction from waves with a point absorber wave energy converter. These tradeoffs were identified in a case study of a new Power Take-Off concept. The simulation results have shown that improvement of Power Take-Off harvested power is followed by a substantial increase on the power peaks that can be 10 to 30 times above the average power. This demands extreme operational conditions on the Power Take-Off components and an undesirable decrease of overall efficiency. The size of the system, in particular, of the main hydraulic pump, is also substantially increased. Thus, the addition of accumulators, to control the pump size, is recommendable, in particular for storage and release of reactive energy to the Power Take-Off oil-hydraulic cylinders.

Suggested Citation

  • Gaspar, José F. & Calvário, Miguel & Kamarlouei, Mojtaba & Soares, C. Guedes, 2018. "Design tradeoffs of an oil-hydraulic power take-off for wave energy converters," Renewable Energy, Elsevier, vol. 129(PA), pages 245-259.
    • Handle: RePEc:eee:renene:v:129:y:2018:i:pa:p:245-259
    DOI: 10.1016/j.renene.2018.05.092
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    References listed on IDEAS

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    6. Gaspar, José F. & Kamarlouei, Mojtaba & Sinha, Ashank & Xu, Haitong & Calvário, Miguel & Faÿ, François-Xavier & Robles, Eider & Guedes Soares, C., 2017. "Analysis of electrical drive speed control limitations of a power take-off system for wave energy converters," Renewable Energy, Elsevier, vol. 113(C), pages 335-346.
    7. Gaspar, José F. & Kamarlouei, Mojtaba & Sinha, Ashank & Xu, Haitong & Calvário, Miguel & Faÿ, François-Xavier & Robles, Eider & Soares, C. Guedes, 2016. "Speed control of oil-hydraulic power take-off system for oscillating body type wave energy converters," Renewable Energy, Elsevier, vol. 97(C), pages 769-783.
    8. Joseba Lasa & Juan Carlos Antolin & Carlos Angulo & Patxi Estensoro & Maider Santos & Pierpaolo Ricci, 2012. "Design, Construction and Testing of a Hydraulic Power Take-Off for Wave Energy Converters," Energies, MDPI, vol. 5(6), pages 1-23, June.
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    11. Kurniawan, Adi & Pedersen, Eilif & Moan, Torgeir, 2012. "Bond graph modelling of a wave energy conversion system with hydraulic power take-off," Renewable Energy, Elsevier, vol. 38(1), pages 234-244.
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    Cited by:

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    2. Chenglong Li & Dahai Zhang & Weijie Zhang & Xiaodong Liu & Ming Tan & Yulin Si & Peng Qian, 2021. "A Constant-Pressure Hydraulic PTO System for a Wave Energy Converter Based on a Hydraulic Transformer and Multi-Chamber Cylinder," Energies, MDPI, vol. 15(1), pages 1-18, December.
    3. Amini, Erfan & Mehdipour, Hossein & Faraggiana, Emilio & Golbaz, Danial & Mozaffari, Sevda & Bracco, Giovanni & Neshat, Mehdi, 2022. "Optimization of hydraulic power take-off system settings for point absorber wave energy converter," Renewable Energy, Elsevier, vol. 194(C), pages 938-954.
    4. Yadong Wen & Weijun Wang & Hua Liu & Longbo Mao & Hongju Mi & Wenqiang Wang & Guoping Zhang, 2018. "A Shape Optimization Method of a Specified Point Absorber Wave Energy Converter for the South China Sea," Energies, MDPI, vol. 11(10), pages 1-22, October.
    5. Yubo Niu & Xingyuan Gu & Xuhui Yue & Yang Zheng & Peijie He & Qijuan Chen, 2022. "Research on Thermodynamic Characteristics of Hydraulic Power Take-Off System in Wave Energy Converter," Energies, MDPI, vol. 15(4), pages 1-15, February.
    6. Milad Shadman & Corbiniano Silva & Daiane Faller & Zhijia Wu & Luiz Paulo de Freitas Assad & Luiz Landau & Carlos Levi & Segen F. Estefen, 2019. "Ocean Renewable Energy Potential, Technology, and Deployments: A Case Study of Brazil," Energies, MDPI, vol. 12(19), pages 1-37, September.
    7. Mohd Afifi Jusoh & Mohd Zamri Ibrahim & Muhamad Zalani Daud & Aliashim Albani & Zulkifli Mohd Yusop, 2019. "Hydraulic Power Take-Off Concepts for Wave Energy Conversion System: A Review," Energies, MDPI, vol. 12(23), pages 1-23, November.
    8. Wei Zhang & Shizhen Li & Yanjun Liu & Detang Li & Qin He, 2020. "Optimal Control for Hydraulic Cylinder Tracking Displacement of Wave Energy Experimental Platform," Energies, MDPI, vol. 13(11), pages 1-17, June.
    9. Gao, Hong & Xiao, Jie, 2021. "Effects of power take-off parameters and harvester shape on wave energy extraction and output of a hydraulic conversion system," Applied Energy, Elsevier, vol. 299(C).
    10. Kamarlouei, M. & Gaspar, J.F. & Calvario, M. & Hallak, T.S. & Mendes, M.J.G.C. & Thiebaut, F. & Guedes Soares, C., 2022. "Experimental study of wave energy converter arrays adapted to a semi-submersible wind platform," Renewable Energy, Elsevier, vol. 188(C), pages 145-163.
    11. Calvário, M. & Gaspar, J.F. & Kamarlouei, M. & Hallak, T.S. & Guedes Soares, C., 2020. "Oil-hydraulic power take-off concept for an oscillating wave surge converter," Renewable Energy, Elsevier, vol. 159(C), pages 1297-1309.
    12. Kamarlouei, Mojtaba & Gaspar, J.F. & Guedes Soares, C., 2022. "Optimal design of an axisymmetric two-body wave energy converter with translational hydraulic power take-off system," Renewable Energy, Elsevier, vol. 183(C), pages 586-600.

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