Experimental investigation of inter-array wake properties in early tidal turbine arrays

2011 ◽  
Author(s):  
L. E. Myers ◽  
B. Keogh ◽  
A.S. Bahaj
Keyword(s):  
Experimental Investigation ◽  
Tidal Turbine ◽  
Turbine Arrays

scholarly journals Tidal current power effects on nearby sandbanks: a case study in the Race of Alderney

2020 ◽  
Vol 378 (2178) ◽  
pp. 20190503 ◽  
Author(s):  
Luke S. Blunden ◽  
Stephen G. Haynes ◽  
AbuBakr S. Bahaj
Keyword(s):  
Sediment Transport ◽  
Tidal Energy ◽  
Sand Wave ◽  
Sand Transport ◽  
Tidal Dynamics ◽  
Tidal Flows ◽  
Tidal Turbine ◽  
Turbine Arrays ◽  
Sediment Model

A validated numerical model of tidal flows and sediment transport around the Alderney South Banks was used to investigate the potential effects of large (300 MW) tidal turbine arrays at different locations in Alderney territorial waters. Two methods were used, firstly looking at hydrodynamic changes only and secondly modelling sediment transport over a non-erodible bed. The baseline hydrodynamic model was validated relative to ADCP velocity data collected in the immediate vicinity of the sandbank. Real-world sand transport rates were inferred from sand-wave migrations and agree favourably with sediment transport residuals calculated from model outputs. Outputs from the sediment model reproduced realistic morphological behaviours over the bank. Seventeen different locations were considered; most did not result in significant hydrodynamic changes over the South Banks; however, three array locations were singled out as requiring extra caution if development were to occur. The results provide a case for optimizing the array locations for twin objectives of maximizing array power and minimizing impacts on the sandbanks. This article is part of the theme issue ‘New insights on tidal dynamics and tidal energy harvesting in the Alderney Race’.

scholarly journals Performance of non-uniform tidal turbine arrays in uniform flow

2018 ◽  
Vol 4 (3) ◽  
pp. 231-241 ◽  
Author(s):  
Paul A. J. Bonar ◽  
Thomas A. A. Adcock ◽  
Vengatesan Venugopal ◽  
Alistair G. L. Borthwick
Keyword(s):  
Uniform Flow ◽  
Tidal Turbine ◽  
Turbine Arrays

scholarly journals Surrogate-Based Optimization of Tidal Turbine Arrays: A Case Study for the Faro-Olhão Inlet

2019 ◽  
pp. 548-561
Author(s):  
Eduardo González-Gorbeña ◽  
André Pacheco ◽  
Theocharis A. Plomaritis ◽  
Óscar Ferreira ◽  
Cláudia Sequeira ◽  
...  
Keyword(s):  
Surrogate Based Optimization ◽  
Tidal Turbine ◽  
Turbine Arrays

scholarly journals Capturing the development and interactions of wakes in tidal turbine arrays using a coupled BEM-DES model

2019 ◽  
Vol 181 ◽  
pp. 71-88 ◽  
Author(s):  
Daniel Gajardo ◽  
Cristián Escauriaza ◽  
David M. Ingram
Keyword(s):  
Tidal Turbine ◽  
Turbine Arrays ◽  
Des Model

scholarly journals Using coupled hydrodynamic biogeochemical models to predict the effects of tidal turbine arrays on phytoplankton dynamics

2016 ◽  
Author(s):  
Pia Schuchert ◽  
Louise Kregting ◽  
Daniel Pritchard ◽  
Graham Savidge ◽  
Björn Elsäßer
Keyword(s):  
Large Scale ◽  
Natural Variation ◽  
Tidal Energy ◽  
Phytoplankton Dynamics ◽  
Hydrodynamic Models ◽  
Energy Device ◽  
Active Radiation ◽  
Biogeochemical Models ◽  
Tidal Turbine ◽  
Turbine Arrays

Abstract. Coupled 2-dimensional biogeochemical and hydrodynamic models offer the opportunity to predict potential effects of large scale tidal energy device (TED) arrays on the local and regional phytoplankton dynamics in coastal and inshore environments. In an idealised environment the effect of TEDs on phytoplankton dynamics accounted for up to 25 % in phytoplankton concentrations, most likely associated with an increased residence time in an inshore basin. However, natural variation such as the intensity of photosynthetically active radiation had a larger effect on phytoplankton dynamics.

scholarly journals The performance of a weir-mounted tidal turbine: An experimental investigation

2021 ◽  
Vol 168 ◽  
pp. 64-75
Author(s):  
M.C. Verbeek ◽  
R.J. Labeur ◽  
W.S.J. Uijttewaal
Keyword(s):  
Experimental Investigation ◽  
Tidal Turbine

scholarly journals Turbulence and Wake Effects in Tidal Stream Turbine Arrays

2018 ◽  
Author(s):  
Martin Nuernberg ◽  
Longbin Tao
Keyword(s):  
Flow Field ◽  
Electricity Generation ◽  
Large Scale ◽  
Numerical Models ◽  
Turbulence Models ◽  
Ambient Flow ◽  
Wake Effects ◽  
Tidal Turbine ◽  
Turbine Arrays ◽  
Good Agreement

Electricity generation from tidal current can provide a reliable and predictable addition to a reduced carbon energy sector in the future. Following the deployment of the first multi-turbine array, significant cost reduction can be achieved by moving beyond demonstrator projects to large scale tidal turbine arrays. The interactions between multiple turbines installed in close proximity can affect the total electricity generation and thus require knowledge of the resulting flow field within and downstream of the array. Results are presented for experimental and numerical studies investigating the flow field characteristics in terms of velocity deficit and turbulence intensity in a staggered tidal turbine array section. Multiple configuration with varying longitudinal and transverse spacing between devices in a three-turbine array are tested. Comparison between numerical and experimental flow characteristics shows that open source numerical models with dynamic mesh features achieve good agreement and can be used for the investigation of array wake effects. The standard k–ω SST shows good agreement with experiments at reduced computational efficiency compared to higher order turbulence models (RSM). The importance of mixing with ambient flow is highlighted by identifying areas of significantly reduced velocity recovery within closely spaced arrays where ambient flow does not penetrate between adjacent wakes.

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