There are examples that OWC devices have been installed in water as shallow as 3 m. Because long waves are usually experience stronger reflection at coasts and breakwaters, they provide good conditions for the operation wave energy devices which work efficiently when the reflection is high. Graw (1996) discussed this idea and pointed out the advantage of shared costs between the breakwater and the wave energy device. The idea of integrating breakwater and wave energy converters emerged in the Indian wave energy program. Particularly popular are OWCs and moored floating bodies. The most common devices are referred to as the oscillating water column (OWC), hinged contour device, buoyant moored device, hinged flap and overtopping device. Depending on the type and their location with respect the coast and offshore, a number of devices have been and are being developed to extract the wave energy for conversion into electricity. The energy in the oscillatory ocean waves can be used to drive a machinery that converts the energy to other forms. Transaction of West-Japan Society of Naval Architecture.Abstract: Ocean wave energy is one of several renewable sources of energy found in the ocean. 3D Boundary Element Method Chapter – 5 Practical Hydrodynamics of Floating Bodies. Bulletin Research Institute for Applied Mechanics, Kyushu University Japan. Association Technique Maritime etAeronautique (ATMA), Paris, France. Water Motion in Moonpools Empirical and Theoretical Approach. on Ocean, Offshore and Arctic Engineering. of 22nd International Society of Offshore and Polar Engineers (ISOPE) Conference. Virginia: Coastal Engineering Research Center.ī. Floating Breakwaters: State of the Art Literature Review. Design and construction of mounds for breakwaters and coastal protection. Conceptual Design of Rubble Mound Breakwaters. From the modifications and evaluations of the models, it could be realized that the moonpools inside the body could be used to obtain a more realistic model without reducing the optimum performance of the original model shape.  The accuracy of the computed results is confirmed with Haskind-Newman and energy conservation relations. The performance and characteristics of the modified models in terms of wave elevations on the free surface are evaluated at various wavelengths by using higher order boundary element method (HOBEM). In the present study, several modifications of the original 3D model are performed which include placing moonpools inside the body. Consequently, it is needed to modify the model to obtain a more realistic and efficient design without reducing significantly the high performance obtained previously. However, because the 3D model is formed by simply extruding the 2D shape in longitudinal direction, it only produces a model with uniform transversal shape which is considered to be less effective and efficient in terms of technical and economical points of view. Moreover, its performance and characteristics in 3D case were also evaluated in the subsequent study. The performance of the obtained model was verified with numerical relations as well as an experiment in towing tank. In an attempt to obtain a 2D floating breakwater model with high performance in wave reflection, genetic algorithm (GA) was combined with boundary element method (BEM) in the previous study. Naval Architecture Department, Engineering Faculty, Hasanuddin University, Makassar Indonesiaįloating breakwater, moonpools, higher order boundary element method (HOBEM), realistic model, transmission coefficient, wave elevation Abstract
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