Please use this identifier to cite or link to this item: http://repositorio.lnec.pt:8080/jspui/handle/123456789/1014938
Title: Numerical evaluation of optimal sizes of wells turbine and chamber of a cluster of oscillating water columns integrated into a breakwater on the southern Brazilian coast
Authors: Wiener G.F.
Teixeira, P.
Didier, E.
Keywords: Wave energy;Oscillating water column;RANS;Turbine size optimization;Generalized–TDO mode
Issue Date: May-2022
Publisher: ASCE
Citation: DOI: 10.1061/(ASCE)WW.1943-5460.0000713
Abstract: This paper describes a numerical evaluation of optimal sizes of a Wells turbine and chamber cross section to be used in a cluster of an oscillating water column (OWC) wave energy converter device. The FLUENT numerical model, based on the Reynolds–averaged Navier–Stokes equations and the volume of fluid technique, is used for modeling hydrodynamic and aerodynamic flows. Two new methods are developed for diminishing the computational cost: the generalized–TDO (turbine diameter optimization) model and the HAS (hydro-aerodynamic similarity) model. The generalized–TDO model is developed to determine the optimal turbine diameter for an OWC chamber with a square cross section. The analytical HAS model employs a similitude method to extend results obtained for a square cross section of the OWC chamber to a rectangular one. The optimal length, B, and width, W, of the chambers and turbine diameter, D, chosen by taking into account the southern Brazilian wave climate, were B ×W=15 × 15 m2 and D=2.75 to 3.00 m and 20 × 20 m2 and D=3.25 to 3.50 m, with efficiencies of 51% and 49%, respectively. Same optimal annual efficiency can be obtained for rectangular cross-section chambers 15 ×W and 20 ×W by using an adequate turbine diameter defined by the HAS model.
URI: http://repositorio.lnec.pt:8080/jspui/handle/123456789/1014938
ISSN: 1943-5460
Appears in Collections:DHA/NPE - Comunicações a congressos e artigos de revista

Files in This Item:
There are no files associated with this item.


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.