Influência da presença de parques de conversores de energia hidrocinética no movimento de sedimentos em cenários idealizados da baía de São Marcos, MA

González-Gorbeña, Eduardo; Júnior, Geraldo Wilson; Rosman, Paulo César Colonna; Qassim, Raad Yahya

doi:10.21168/rbrh.v20n2.p379-393

Cited by 2 publications

(4 citation statements)

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“…In Table 8, the solutions for the 4 models provide optimum arrays containing the minimum and maximum number of TECs per row defined, i.e. x2 ∈ [6,11], while for the variable defining the number of rows, the optimum solution of the largest array does not exceed 5 rows (Model 1). These results align with the findings of [16], [17], [60].…”

Section: Discussionmentioning

confidence: 99%

“…Thus, TEC array size, and its effects on flow characteristics and inlets morphology, are described through surrogates built as functions of two integer design variables: the number of rows in the array (x1) and the number of TECs for every row of the array (x2). The intervals of each integer variable are set to: x1 ∈ [1,13] and x2 ∈ [6,11].…”

Section: Problem Formulation and Design Of Computer Experimentsmentioning

confidence: 99%

“…The direct consequence of installing and operating a TEC is the alteration of the system's hydrodynamics. As a result of the modification of the hydrodynamic field, other environmental impacts can arise, such as: decrease tidal flooding [6], modify population distribution and dynamics of marine organisms [7], alter water quality [8], increase noise pollution [9], transform marine habitats [10], increase mixing in systems where salinity/temperature gradients are well-defined [10], and affect the transport and deposition of sediments [11]. The effect of TECs on sediment dynamics has been the subject of intense research in the last years by means of numerical modelling.…”

Section: Introductionmentioning

confidence: 99%

“…The effect of TECs on sediment dynamics has been the subject of intense research in the last years by means of numerical modelling. Apart from the study of [11] for São Marcos Bay, Brazil, all of the research focuses on UK (e.g. [12], [13] [57],) and France [14] tidal stream energy sites.…”

Section: Introductionmentioning

confidence: 99%

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Estimating the optimum size of a tidal array at a multi-inlet system considering environmental and performance constraints

et al. 2018

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This paper investigates the optimum tidal energy converter array density at a tidal inlet by applying surrogate-based optimisation. The SBO procedure comprises problem formulation, design of experiments, numerical simulations, surrogate model construction and constrained optimisation. This study presents an example for the Faro-Olhão Inlet in the Ria Formosa (Portugal), a potential site for tidal in-stream energy extraction. A 35 kW Evopod TM floating tidal energy converter from Oceanflow Energy Ltd. has been used for array size calculations considering two design variables: 1) number of array rows, and 2) number of tidal energy converter per row. Arrays up to 13 rows with 6 to 11 tidal energy converters each are studied to assess their impacts on array performance, inlets discharges and bathymetry changes. The analysis identified the positive/negative feedbacks between the two design variables in real case complex flow fields under variable bathymetry and channel morphology. The non-uniformity of tidal currents along the array region causes the variability of the resource in each row, as well as makes it difficult to predict the resultant array configuration interactions. Four different multi-objective optimisation models are formulated subject to a set of performance and environmental constraints. Pre-print 2Results from the optimisation models imply that the largest array size that meets the environmental constraints is made of 5 rows with 6 tidal energy converter each and an overall capacity factor of 11.6% resulting in an energy production of 1.01 GWh.year -1 . On the other hand, a higher energy production (1.20 GWh.year -1 ) is achieved by an optimum array configuration, made of 3 rows with 10 tidal energy converters per row, which maximises power output satisfying environmental and performance restrictions. This optimal configuration permits a good level of energy extraction while having a reduced effect on the hydrodynamic functioning of the multiinlet system. These results prove the suitability and the potential wide use of the surrogate-based optimisation method to define array characteristics that enhance power production and at the same time respect the environmental surrounding conditions.

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