The sea is an important resource of renewable energy for its extension and the power conveyed by waves, currents, tides and thermal gradients. Amongst these physical phenomena, sea waves are the source with the highest energy density and may contribute to fulfilling the global increase of power demand. Despite the potential of sea waves, their harnessing is still a technological challenge. One of the simplest and most reliable solutions for the optimal exploitation of this source is represented by the oscillating water column systems operating with Wells turbines. With the aim to predict the operating curves of monoplane isolated Wells turbines, computational fluid dynamics models were developed. A three-dimensional multi-block technique was applied to create the computational domain of the air with a fully mapped mesh composed of hexahedral elements. The employment of circumferential periodic boundary conditions allowed for the reduction of computational power and time. The proposed models use RANS or u-RANS schemes with a multiple reference frame approach or the u- RANS formulation with a sliding mesh approach. In order to validate the implemented models, comparisons of the achieved results and literature analytical and experimental data were performed in environmental conditions typical of the Mediterranean Sea, showing a good agreement

Computational fluid dynamics models of Wells turbines for oscillating water column systems / Lorenzo Ciappi, Michal Stebel, Jacek Smolka, Lorenzo Cappietti, Giampaolo Manfrida. - ELETTRONICO. - (2020), pp. 1-18. (Intervento presentato al convegno 6th International Conference on Contemporary Problems of Thermal Engineering (CPOTE) tenutosi a Cracow, Poland nel 21-24 September 2020).

Computational fluid dynamics models of Wells turbines for oscillating water column systems

Lorenzo Ciappi
Software
;
Michal Stebel
Data Curation
;
Jacek Smolka
Validation
;
Lorenzo Cappietti
Supervision
;
Giampaolo Manfrida
Supervision
2020

Abstract

The sea is an important resource of renewable energy for its extension and the power conveyed by waves, currents, tides and thermal gradients. Amongst these physical phenomena, sea waves are the source with the highest energy density and may contribute to fulfilling the global increase of power demand. Despite the potential of sea waves, their harnessing is still a technological challenge. One of the simplest and most reliable solutions for the optimal exploitation of this source is represented by the oscillating water column systems operating with Wells turbines. With the aim to predict the operating curves of monoplane isolated Wells turbines, computational fluid dynamics models were developed. A three-dimensional multi-block technique was applied to create the computational domain of the air with a fully mapped mesh composed of hexahedral elements. The employment of circumferential periodic boundary conditions allowed for the reduction of computational power and time. The proposed models use RANS or u-RANS schemes with a multiple reference frame approach or the u- RANS formulation with a sliding mesh approach. In order to validate the implemented models, comparisons of the achieved results and literature analytical and experimental data were performed in environmental conditions typical of the Mediterranean Sea, showing a good agreement
2020
Proceedings of the 6th International Conference on Contemporary Problems of Thermal Engineering (CPOTE)
6th International Conference on Contemporary Problems of Thermal Engineering (CPOTE)
Cracow, Poland
21-24 September 2020
Goal 7: Affordable and clean energy
Goal 13: Climate action
Lorenzo Ciappi, Michal Stebel, Jacek Smolka, Lorenzo Cappietti, Giampaolo Manfrida
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/1206546
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