2020
DOI: 10.3390/en13123240
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Hydrodynamic Effects of Tidal-Stream Power Extraction for Varying Turbine Operating Conditions

Abstract: Realistic evaluation of tidal-stream power extraction effects on local hydrodynamics requires the inclusion of the turbine’s operating conditions (TOC). An alternative approach for simulating the turbine’s array energy capture at a regional scale, momentum sink-TOC, is used to assess the impact of power extraction. The method computes a non-constant thrust force calculated based on the turbine’s operating conditions, and it uses the wake induction factor and blockage ratio to characterise the performance of a … Show more

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Cited by 4 publications
(3 citation statements)
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References 57 publications
(112 reference statements)
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“…When blockage correction is included, the thrust is reinforced, which favours the flow deceleration through the turbine(s) and increases the by-pass flow-acceleration at both the turbine-and the array-scales. For realistic values of B (B < 20%), comparable perturbations of the flow pattern (and associated loss of power) have been reported when the thrust increases [10,32]. It is, however, difficult to inter-compare quantitatively those studies as flow configurations and turbine settings are different from one study to another.…”
Section: Resultsmentioning
confidence: 93%
See 1 more Smart Citation
“…When blockage correction is included, the thrust is reinforced, which favours the flow deceleration through the turbine(s) and increases the by-pass flow-acceleration at both the turbine-and the array-scales. For realistic values of B (B < 20%), comparable perturbations of the flow pattern (and associated loss of power) have been reported when the thrust increases [10,32]. It is, however, difficult to inter-compare quantitatively those studies as flow configurations and turbine settings are different from one study to another.…”
Section: Resultsmentioning
confidence: 93%
“…In this case, the maximum power coefficient C P reached 0.80 [29] or 0.89 [30], depending if the head loss induced by the turbines is considered or not. Finally, the effects of blockage on thrust and power of tidal turbines have also been investigated numerically [24,24,25,31,32]. For instance, Nishino and Willden [24] investigated idealised flow conditions around a single turbine, and Thiébot et al [33] analysed the efficiency (expressed in terms of the thrust and power coefficients) of fences of tidal turbines deployed in the Alderney Race.…”
Section: Introductionmentioning
confidence: 99%
“…While there are many options for incorporating the impacts of turbines into models, they generally have comparable approaches. 49,[57][58][59][60][61] One approach for simulating energy extraction incorporates an extra retarding force into the momentum equations. This force may be written as…”
Section: Reviewmentioning
confidence: 99%