Fractional Flow Speed-Up from Porous Windbreaks for Enhanced Wind-Turbine Power

Tobin, Nicolas; Hamed, Ali M.; Chamorro, Leonardo P.

doi:10.1007/s10546-016-0228-8

Cited by 31 publications

(34 citation statements)

References 35 publications

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“…The local inviscid speedup is predicted in a way that is consistent with the method outlined in Tobin et al [7]. The main components of this method are outlined below.…”

Section: Inviscid Speedup From Windbreakssupporting

confidence: 65%

“…Tobin et al [7] showed that δ has a universal behaviour as z → 0 when normalized by L, the length of the recirculation zone, defined as the distance from the windbreak where the zero-velocity contour touches the ground:…”

Section: Inviscid Speedup From Windbreaksmentioning

confidence: 99%

“…However, typical values of L are on the order of 10h. The function f is reported in Tobin et al [7] for η = 0.1, as well as for several porosities based on the large-eddy simulations (LES) of Fang and Wang [15].…”

Section: Inviscid Speedup From Windbreaksmentioning

confidence: 99%

“…However, the impact on wake recovery is not the only effect to be considered. Tobin et al [7] recently demonstrated the usefulness of windbreaks (typically rows of trees or fence structures) in diverting low-level flow to the level of a wind turbine rotor, where a significant increase in power production was shown to agree well with linear theory. However, the impact of the windbreak wake on the power production of downwind turbines remains unclear.…”

Section: Introductionmentioning

confidence: 99%

“…For instance, Denholm et al [8] showed several typical wind-farm-layout strategies. In a single string configuration, where turbines are only rarely in the wakes of others, the single-turbine analysis of Tobin et al [7] should be broadly applicable. However, other cases (e.g., the parallel-rows and cluster configurations) require an accounting for windbreak wakes.…”

Section: Introductionmentioning

confidence: 99%

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Windbreak Effects Within Infinite Wind Farms

Tobin

Chamorro

2017

Energies

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Building upon a recent study that showed windbreaks to be effective in increasing the power output of a wind turbine, the potential of windbreaks in a large wind farm is explored using simplified formulations. A top-down boundary layer approach is combined with methods of estimating both the roughness effects of windbreaks and the induced inviscid speed-up for nearby turbines to investigate power production impact for several layouts of infinite wind farms. Results suggest that the negative impact of windbreak wakes for an infinite wind farm will outweigh the local inviscid speed-up for realistic inter-turbine spacings, with the break-even point expected at a spacing of ∼25 rotor diameters. However, the possibility that windbreaks may be applicable in finite and other wind farm configurations remains open. Inspection of the windbreak porosity reveals an impact on the magnitude of power perturbation, but not whether the change is positive or negative. Predictions from the boundary-layer approach are validated with power measurements from large-eddy simulations.

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“…The local inviscid speedup is predicted in a way that is consistent with the method outlined in Tobin et al [7]. The main components of this method are outlined below.…”

Section: Inviscid Speedup From Windbreakssupporting

confidence: 65%

Section: Inviscid Speedup From Windbreaksmentioning

confidence: 99%

Section: Inviscid Speedup From Windbreaksmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Windbreak Effects Within Infinite Wind Farms

Tobin

Chamorro

2017

Energies

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Front Deflector Effects on the Aerodynamic Characteristics of Horizontal Axis Wind Turbines: A Reynolds‐Averaged Navier–Stokes Simulation Study

Zhang,

Yang,

Tian

et al. 2024

Energy Tech

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Flow control devices have garnered significant attention from domestic and international wind energy scholars. In an effort to capture more wind energy and boost the output power of wind turbines, this study incorporates flow control devices into the upstream area of the wind turbine. The study then assesses the impact of the spacing, tilt angle, and height of the flow control devices on the turbine's performance. The study demonstrates that the addition of flow control devices does lead to a notable enhancement in wind turbine power, with a maximum power output growth rate of 9.74%. The maximum growth rates for the average output power of the wind turbine due to the three factors (α, H, and Lw) are 4.20%, 3.76%, and 3.54%, respectively. The degree of influence of the three factors is as follows: α > H > Lw.

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