Wave energy converter geometry for coastal flooding mitigation

被引:25
作者
Bergillos, Rafael J. [1 ]
Rodriguez-Delgado, Cristobal [2 ,3 ]
Allen, James [2 ]
Iglesias, Gregorio [2 ,4 ,5 ]
机构
[1] Univ Cordoba, Dept Agron, Hydraul Engn Area, Rabanales Campus,Leonardo Da Vinci Bldg, E-14071 Cordoba, Spain
[2] Univ Plymouth, Sch Engn, Plymouth PL4 8AA, Devon, England
[3] PROES Consultores, Calle San German 39, Madrid 28020, Spain
[4] Univ Coll Cork, Environm Res Inst, MaREI, Coll Rd, Cork, Ireland
[5] Univ Coll Cork, Sch Engn, Coll Rd, Cork, Ireland
关键词
Wave farm; Device geometry; Laboratory tests; Numerical models; Coastal flooding; OSCILLATING WATER COLUMN; POWER TAKE-OFF; RENEWABLE ENERGY; HYDRODYNAMIC PERFORMANCE; FRAMEWORK MODEL; GRAVEL BEACHES; FARM IMPACT; MIXED SAND; WIND; PROTECTION;
D O I
10.1016/j.scitotenv.2019.03.022
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Wave farms, i.e., arrays of wave energy converters (WECs), have been proposed to fulfil the dual function of carbon-free energy generation and coastal protection. The objective of this work is to investigate, for the first time, how the coastal protection performance against flooding is affected by WEC geometry. This is done by means of a case study with WaveCat WECs (floating, overtopping WECs) deployed off the Playa Granada beach (Spain). To this end, two models of WaveCat WECs with different geometries are tested in a laboratory tank at a 1:30 scale under low-, mid- and high-energy sea states representative of the wave conditions of Playa Granada. The geometries differed in the angle between the twin hulls (wedge angle) of WaveCat: 30 degrees and 60 degrees. The reflection and transmission coefficients thus obtained are used in a coupled numerical modelling approach, combining wave and coastal processes models (SWAN and XBeach-G, respectively). We find that WECs with an angle of 60 degrees provide more (less) protection for long (short) wave periods in terms of reductions in wave height and run-up on the beach. As for the flooded dry beach areas, they are generally smaller for WECs with 60 degrees, with only some exceptions under mild conditions. Thus, considering that beach inundation usually occurs under high-energy, storm conditions, we conclude that the wave farm composed by WECs with a wedge angle of 60 degrees is more efficient against coastal flooding. (C) 2019 Elsevier B.V. All rights reserved.
引用
收藏
页码:1232 / 1241
页数:10
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