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http://dx.doi.org/10.12989/ose.2020.10.4.359

Numerical and experimental study on hydrodynamic performance of multi-level OWEC  

Jungrungruengtaworn, Sirirat (Department of Maritime Engineering, Faculty of International Maritime Studies, Kasetsart University)
Reabroy, Ratthakrit (Department of Maritime Engineering, Faculty of International Maritime Studies, Kasetsart University)
Thaweewat, Nonthipat (Department of Maritime Engineering, Faculty of International Maritime Studies, Kasetsart University)
Hyun, Beom-Soo (Department of Naval Architecture and Ocean Systems Engineering, Korea Maritime and Ocean University)
Publication Information
Ocean Systems Engineering / v.10, no.4, 2020 , pp. 359-371 More about this Journal
Abstract
The performance of a multi-level overtopping wave energy converter (OWEC) has been numerically and experimentally investigated in a two-dimensional wave tank in order to study the effects of opening width of additional reservoirs. The device is a fixed OWEC consisting of an inclined ramp together with several reservoirs at different levels. A particle-based numerical simulation utilizing the Lattice Boltzmann Method (LBM) is used to simulate the flow behavior around the OWEC. Additionally, an experimental model is also built and tested in a small wave flume in order to validate the numerical results. A comparison in energy captured performance between single-level and multi-level devices has been proposed using the hydraulic efficiency. The enhancement of power capture performance is accomplished by increasing an overtopping flow rate captured by the extra reservoirs. However, a noticeably large opening of the extra reservoirs can result in a reduction in the power efficiency. The overtopping flow behavior into the reservoirs is also presented and discussed. Moreover, the results of hydrodynamic performance are compared with a similar study, of which a similar tendency is achieved. Nevertheless, the LBM simulations consume less computational time in both pre-processing and calculating phases.
Keywords
wave energy; marine renewable energy; overtopping; LBM;
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Times Cited By KSCI : 11  (Citation Analysis)
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