https://scholars.lib.ntu.edu.tw/handle/123456789/611679
標題: | Wave energy converters in array configurations—Influence of interaction effects on the power performance and fatigue of mooring lines | 作者: | Yang S.-H. Ringsberg J.W. Johnson E. SHUN-HAN YANG |
關鍵字: | Continuum mechanics;Digital arithmetic;Fatigue damage;Hydrodynamics;Mooring;Wave energy conversion;Accumulated fatigue damage;Array configurations;Environmental loadings;Hydrodynamic interaction;Hydrodynamic interaction effects;Levelised cost of energies;Potential-flow theory;Wave energy converters;Mooring cables;array;fatigue;hydrodynamics;loading;mooring system;performance assessment;potential flow;structural response;wave energy;wave power | 公開日期: | 2020 | 卷: | 211 | 來源出版物: | Ocean Engineering | 摘要: | In an array system of wave energy converters (WECs), hydrodynamic interactions between the WECs occur through the absorption, radiation, and diffraction of waves. The main objective of this study was to analyse the hydrodynamic interactions between floating point-absorbing WECs and the influence of this interaction on the power performance and fatigue life of the WECs’ mooring lines. The hydrodynamic and structural response of the WEC systems were analysed primarily using potential flow theory, the Morison equation, and continuum mechanics theory. Four 2-WEC models and two 10-WEC models, among which different separating distances and mooring configurations were considered, were investigated. The models were simulated for various environmental loading conditions. The results from each simulation were evaluated in terms of the power performance of each WEC, accumulated fatigue damage in each mooring line, and the levelised cost of energy (LCoE). The hydrodynamic interactions show a larger impact on the 10-WEC simulation models. To account for the hydrodynamic interactions in the simulations using the 10-WEC models, the fatigue damage in the mooring lines is varied at an average of 15% and a maximum of an order of magnitude difference. A similar comparison of power performance showed an approximate difference in the results of 10%. The LCoE calculation of the 10-WEC array system showed LCoE values that range from ?40% to +200% relative to the simulations that did not consider the hydrodynamic interaction effects. Comparatively, the LCoE calculation of the 2-WEC model either decreased by 17% or increased by 23% when the hydrodynamic interaction was included in the simulation model. ? 2020 Elsevier Ltd |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85087285271&doi=10.1016%2fj.oceaneng.2020.107294&partnerID=40&md5=b5e2efb9b4ff636902cd18f68a5ce7b3 https://scholars.lib.ntu.edu.tw/handle/123456789/611679 |
DOI: | 10.1016/j.oceaneng.2020.107294 |
顯示於: | 工程科學及海洋工程學系 |
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