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Laboratory study on the effects of hydro kinetic turbines on hydrodynamics and sediment dynamics

Author

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  • Ramírez-Mendoza, R.
  • Amoudry, L.O.
  • Thorne, P.D.
  • Cooke, R.D.
  • McLelland, S.J.
  • Jordan, L.B.
  • Simmons, S.M.
  • Parsons, D.R.
  • Murdoch, L.

Abstract

The need for hydrokinetic turbine wake characterisation and their environmental impact has led to a number of studies. However, a small number of them have taken into account mobile sediment bed effects. The aim of the present work is to study the impact of the presence of a horizontal-axis three-bladed turbine with the flow and a mobile sediment bed. We use a series of laboratory experiments with a scaled modelled turbine installed in a flume with a mobile sandy bed at the bottom. Acoustic instruments were used to monitor flow, suspended sediment and bed behaviour. Results show a velocity decrease of about 50% throughout the water column and no flow recovery after a distance of 15 rotor diameters. Clearly visible ripples in the absence of the model turbine were replaced by horseshoe-shaped scour pit in the near wake region, and a depositional heap in the far wake. Suspended sediment differences were recorded in the streamwise direction with a possible effect of the wake as far as 15 rotor diameters. These results imply potentially important effects on the efficiency of turbine arrays, if the flow were to be lower than expected, on turbine foundations and modify coastal sediment transport.

Suggested Citation

  • Ramírez-Mendoza, R. & Amoudry, L.O. & Thorne, P.D. & Cooke, R.D. & McLelland, S.J. & Jordan, L.B. & Simmons, S.M. & Parsons, D.R. & Murdoch, L., 2018. "Laboratory study on the effects of hydro kinetic turbines on hydrodynamics and sediment dynamics," Renewable Energy, Elsevier, vol. 129(PA), pages 271-284.
    • Handle: RePEc:eee:renene:v:129:y:2018:i:pa:p:271-284
    DOI: 10.1016/j.renene.2018.05.094
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    References listed on IDEAS

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    1. Möller, N.J. & Kim, H. & Neary, V.S. & García, M.H. & Chamorro, L.P., 2016. "On the near-wall effects induced by an axial-flow rotor," Renewable Energy, Elsevier, vol. 91(C), pages 524-530.
    2. Li, Xiaorong & Li, Ming & McLelland, Stuart J. & Jordan, Laura-Beth & Simmons, Stephen M. & Amoudry, Laurent O. & Ramirez-Mendoza, Rafael & Thorne, Peter D., 2017. "Modelling tidal stream turbines in a three-dimensional wave-current fully coupled oceanographic model," Renewable Energy, Elsevier, vol. 114(PA), pages 297-307.
    3. Hill, Craig & Musa, Mirko & Guala, Michele, 2016. "Interaction between instream axial flow hydrokinetic turbines and uni-directional flow bedforms," Renewable Energy, Elsevier, vol. 86(C), pages 409-421.
    4. Tedds, S.C. & Owen, I. & Poole, R.J., 2014. "Near-wake characteristics of a model horizontal axis tidal stream turbine," Renewable Energy, Elsevier, vol. 63(C), pages 222-235.
    5. Myers, L.E. & Bahaj, A.S., 2012. "An experimental investigation simulating flow effects in first generation marine current energy converter arrays," Renewable Energy, Elsevier, vol. 37(1), pages 28-36.
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    1. Li, Xiaorong & Li, Ming & Amoudry, Laurent O. & Ramirez-Mendoza, Rafael & Thorne, Peter D. & Song, Qingyang & Zheng, Peng & Simmons, Stephen M. & Jordan, Laura-Beth & McLelland, Stuart J., 2020. "Three-dimensional modelling of suspended sediment transport in the far wake of tidal stream turbines," Renewable Energy, Elsevier, vol. 151(C), pages 956-965.
    2. Musa, Mirko & Hill, Craig & Guala, Michele, 2019. "Interaction between hydrokinetic turbine wakes and sediment dynamics: array performance and geomorphic effects under different siting strategies and sediment transport conditions," Renewable Energy, Elsevier, vol. 138(C), pages 738-753.
    3. Ramírez-Mendoza, R. & Murdoch, L. & Jordan, L.B. & Amoudry, L.O. & McLelland, S. & Cooke, R.D. & Thorne, P. & Simmons, S.M. & Parsons, D. & Vezza, M., 2020. "Asymmetric effects of a modelled tidal turbine on the flow and seabed," Renewable Energy, Elsevier, vol. 159(C), pages 238-249.
    4. Álvarez, M. & Ramos, V. & Carballo, R. & Arean, N. & Torres, M. & Iglesias, G., 2020. "The influence of dredging for locating a tidal stream energy farm," Renewable Energy, Elsevier, vol. 146(C), pages 242-253.

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