Semi-analytical estimate of energy production from a tidal turbine farm with the account of ambient turbulence

Pinon, Grégory; Hurst, Matías Fernández; Lukeba, Edile

doi:10.1016/j.ijome.2017.05.003

Cited by 6 publications

(6 citation statements)

References 28 publications

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“…As observed in this section, whatever the configuration is and for the highest turbulence intensity, a rapid recovery of the wake is noticed. In term of engineering approach, this result is very interesting for turbines layout in a farm during the array development or for optimisation of turbine positioning (see for instance [36]). For the lowest turbulence intensity, interactions really occur and accurate computations of such configurations can be challenging for the scientific community.…”

Section: Upstream Velocity Conditionsmentioning

confidence: 99%

Three tidal turbines in interaction: An experimental study of turbulence intensity effects on wakes and turbine performance

et al. 2020

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The development of marine current turbine arrays depends on the understanding of the interaction effects that exist between turbines in close proximity. Moreover, the ambient turbulence intensity also plays a major role in the behaviour of tidal turbines. Thus it is necessary to take ambient turbulence into account when studying interaction effects between several turbines. In order to highlight these interaction effects, experiments have been carried out in the IFREMER flume tank. These experiments focus on interactions between three horizontal axis turbines. This paper presents the experimental results obtained for three configurations with two ambient turbulence intensity rates. Highlights ► Experimental results of 3 turbines in interaction: wake, power and thrust. ► 3 geometrical configurations with 2 turbulence intensities are considered. ► Ambient turbulence influence assessment on interaction mechanisms. ► Downstream turbine large power losses can be observed. ► Power spectral density analysis does not show any upstream turbine signature.

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Section: Upstream Velocity Conditionsmentioning

confidence: 99%

Three tidal turbines in interaction: An experimental study of turbulence intensity effects on wakes and turbine performance

et al. 2020

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“…Such conclusions would have a major influence on the fatigue of the blades and the other components of the turbines. This can impact significantly the turbines design and hence their cost (Pinon et al, 2017).…”

Section: Comparisonmentioning

confidence: 99%

Turbine design dependency to turbulence: An experimental study of three scaled tidal turbines

et al. 2021

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In this paper the turbulence effects are studied for three rotors mounted on the same instrumented hub. Two scaled models of industrial turbines and one open-geometry turbine are considered. The turbulence characteristics are obtained from 2D Laser Doppler Velocimeter measurements and the turbine behaviour is analysed from thrust and torque measurements. Three turbulence intensities and a large range of tip speed ratios and flow velocities are considered. The results are anonymised in order to ensure confidentiality. The rotors have different blade profiles, blade numbers and solidity. The rotor design largely modifies the mean power and thrust coefficients. The turbulence intensity only slightly changes these results but has a larger influence on the fluctuating loads than the different rotor designs. The spectral analysis of the rotor torque and thrust shows that, at low frequencies the load variations are correlated to those of the flow velocity with some differences due to the turbulence intensity levels. The coherences between the loads and the velocity seem to be not affected by the rotor type. At high frequencies, the load variations are correlated to the speed control unit of the scaled model and the rotor design has an impact on the rotational speed and loads coherences.

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“…The analytical model of Bahaj and Myers [58] has recently been modified by Pinon et al [61] in order to incorporate the ambient turbulence effects on the energy yield. The modification was based on the experimental data of Mycek et al [62,63] who showed that the ambient turbulence affects the velocity recovery in the wakes of turbines and the power coefficient of downstream turbines.…”

Section: Assessment Of the Annual Energy Productionmentioning

confidence: 99%

“…The analytical model of Bahaj & Myers [58] has recently been modified by Pinon et al . [61] in order to incorporate the ambient turbulence effects on the energy yield. The modification was based on the experimental data of Mycek et al .…”

Section: Assessment Of the Annual Energy Productionmentioning

confidence: 99%

Numerical modelling of hydrodynamics and tidal energy extraction in the Alderney Race: a review

Thiebot

Coles

Bennis

et al. 2020

Phil. Trans. R. Soc. A.

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The tides are a predictable, renewable, source of energy that, if harnessed, can provide significant levels of electricity generation. The Alderney Race (AR), with current speeds that exceed 5 m s −1 during spring tides, is one of the most concentrated regions of tidal energy in the world, with the upper-bound resource estimated at 5.1 GW. Owing to its significance, the AR is frequently used for model case studies of tidal energy conversion, and here we review these model applications and outcomes. We examine a range of temporal and spatial modelling scales, from regional models applied to resource assessment and characterization, to more detailed models that include energy extraction and array optimization. We also examine a range of physical processes that influence the tidal energy resource, including the role of waves and turbulence in tidal energy resource assessment and loadings on turbines. The review discusses model validation, and covers a range of numerical modelling approaches, from two-dimensional to three-dimensional tidal models, two-way coupled wave-tide models, Large Eddy Simulation (LES) models, and the application of optimization techniques. The review contains guidance on model approaches and sources of data that can be used for future studies of the AR, or translated to other tidal energy regions. This article is part of the theme issue ‘New insights on tidal dynamics and tidal energy harvesting in the Alderney Race’.

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Semi-analytical estimate of energy production from a tidal turbine farm with the account of ambient turbulence

Cited by 6 publications

References 28 publications

Three tidal turbines in interaction: An experimental study of turbulence intensity effects on wakes and turbine performance

Three tidal turbines in interaction: An experimental study of turbulence intensity effects on wakes and turbine performance

Turbine design dependency to turbulence: An experimental study of three scaled tidal turbines

Numerical modelling of hydrodynamics and tidal energy extraction in the Alderney Race: a review

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