Influence of a tapered and slender wave collector on the increment of the efficiency of an oscillating water column wave-energy converter

Mora, A.; Bautista, E.; Méndez, F.

doi:10.1016/j.oceaneng.2016.11.001

Cited by 16 publications

(2 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We assume a linear response of the PTO resistance so that in (7) K 2 ¼ 0 and introducing this as a limiting case in (9) results in KðjpjÞ ¼ K ¼ K 1 . Hereafter we use the symbol K as K 1 .…”

Section: Linear Analysismentioning

confidence: 99%

“…Whilst the assumption may not be appropriate for all cases, particularly for full-scale OWC structures, the calculation method is an invaluable tool for determining the performance of OWC, in particular with respect to the optimisation of the OWC configuration (size of opening, layout cross-sectional area of the chamber, effect of wave collectors), given the incident wave characteristics. A recent example is the work from Mora et al [9], where the introduction and influence of wave collectors in front of an OWC structure is studied, considering incompressible flow.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The influence of scale on the air flow and pressure in the modelling of Oscillating Water Column Wave Energy Converters

Dimakopoulos

Cooker

Bruce

2017

International Journal of Marine Energy

View full text Add to dashboard Cite

a b s t r a c tIn this work, air compressibility effects are investigated during wave interaction with an Oscillating Water Column (OWC) Wave Energy Converter (WEC). Mathematical modelling includes a thermodynamic equation for the air phase and potential flow equations for the water phase. A simple three dimensional OWC geometry with a linear Power Take Off (PTO) response is considered and both the thermodynamic and potential flow equations are linearised. Analysis of the linearised system of equations reveals a nondimensional coefficient which we name ''compression number". The flow potential is decomposed into scattering and radiation components, using an analogue of spring-dashpot response and taking into account the additional effects of air compressibility to wave interaction processes. We use these concepts to characterise the relative importance of the air compressibility effects inside the OWC and to derive novel scaling relations for further investigation of scaling effects in OWC physical modelling. The predictions of the methodology are validated against large scale experimental data, where compressibility effects are evident and further application of the methodology to a realistic OWC geometry is used to demonstrate the importance of these effects to prototype scale.

show abstract

Section: Linear Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%