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Numerical Study on Self-Starting Performance of Darrieus Vertical Axis Turbine for Tidal Stream Energy Conversion

Author

Listed:
  • Zhen Liu

    (Shandong Provincial Key Laboratory of Ocean Engineering, Ocean University of China, Qingdao 266100, China
    Qingdao Municiple Key Laboratory of Ocean Renewable Energy, Ocean University of China, Qingdao 266100, China)

  • Hengliang Qu

    (College of Engineering, Ocean University of China, Qingdao 266100, China)

  • Hongda Shi

    (Shandong Provincial Key Laboratory of Ocean Engineering, Ocean University of China, Qingdao 266100, China
    Qingdao Municiple Key Laboratory of Ocean Renewable Energy, Ocean University of China, Qingdao 266100, China)

Abstract

Self-starting performance is a key factor in the evaluation of a Darrieus straight-bladed vertical axis turbine. Most traditional studies have analyzed the turbine’s self-starting capability using the experimental and numerical data of the forced rotation. A 2D numerical model based on the computational fluid dynamics (CFD) software ANSYS-Fluent was developed to simulate the self-starting process of the rotor at constant incident water-flow velocities. The vertical-axis turbine (VAT) rotor is driven directly by the resultant torque generated by the water flow and system loads, including the friction and reverse loads of the generator. It is found that the incident flow velocity and the moment of inertia of the rotor have little effect on the averaged values of tip-speed ratios in the equilibrium stage under no-load conditions. In the system load calculations, four modes of the self-starting were found: stable equilibrium mode, unstable equilibrium mode, switch mode and halt mode. The dimensionless power coefficient in the simulations of passive rotation conditions is found to be, on average, 38% higher than those achieved in the simulations of forced rotation conditions.

Suggested Citation

  • Zhen Liu & Hengliang Qu & Hongda Shi, 2016. "Numerical Study on Self-Starting Performance of Darrieus Vertical Axis Turbine for Tidal Stream Energy Conversion," Energies, MDPI, vol. 9(10), pages 1-15, September.
    • Handle: RePEc:gam:jeners:v:9:y:2016:i:10:p:789-:d:79366
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    References listed on IDEAS

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    1. Rossetti, A. & Pavesi, G., 2013. "Comparison of different numerical approaches to the study of the H-Darrieus turbines start-up," Renewable Energy, Elsevier, vol. 50(C), pages 7-19.
    2. Sengupta, A.R. & Biswas, A. & Gupta, R., 2016. "Studies of some high solidity symmetrical and unsymmetrical blade H-Darrieus rotors with respect to starting characteristics, dynamic performances and flow physics in low wind streams," Renewable Energy, Elsevier, vol. 93(C), pages 536-547.
    3. Singh, M.A. & Biswas, A. & Misra, R.D., 2015. "Investigation of self-starting and high rotor solidity on the performance of a three S1210 blade H-type Darrieus rotor," Renewable Energy, Elsevier, vol. 76(C), pages 381-387.
    4. Marsh, Philip & Ranmuthugala, Dev & Penesis, Irene & Thomas, Giles, 2015. "Three-dimensional numerical simulations of straight-bladed vertical axis tidal turbines investigating power output, torque ripple and mounting forces," Renewable Energy, Elsevier, vol. 83(C), pages 67-77.
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    Cited by:

    1. Muhammad Saif Ullah Khalid & David Wood & Arman Hemmati, 2022. "Self-Starting Characteristics and Flow-Induced Rotation of Single- and Dual-Stage Vertical-Axis Wind Turbines," Energies, MDPI, vol. 15(24), pages 1-19, December.
    2. Mohammad Hassan Khanjanpour & Akbar A. Javadi, 2020. "Experimental and CFD Analysis of Impact of Surface Roughness on Hydrodynamic Performance of a Darrieus Hydro (DH) Turbine," Energies, MDPI, vol. 13(4), pages 1-18, February.
    3. Shuang Wu & Yanjun Liu & Qi An, 2018. "Hydrodynamic Analysis of a Marine Current Energy Converter for Profiling Floats," Energies, MDPI, vol. 11(9), pages 1-14, August.

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