Wave flume experiments on two-dimensional oscillating water column wave energy devices

1992 ◽  
Vol 12-12 (4-5) ◽  
pp. 286-292 ◽  
Author(s):  
A. J. N. A. Sarmento
Keyword(s):  
Water Column ◽  
Wave Energy ◽  
Two Dimensional ◽  
Oscillating Water Column ◽  
Flume Experiments ◽  
Energy Devices ◽  
Wave Flume

scholarly journals Efficiency and Survivability of a Floating Oscillating Water Column Wave Energy Converter Moored to the Seabed: An Overview of the EsflOWC MaRINET2 Database

Water ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 992 ◽  
Author(s):  
Dogan Kisacik ◽  
Vasiliki Stratigaki ◽  
Minghao Wu ◽  
Lorenzo Cappietti ◽  
Irene Simonetti ◽  
...  
Keyword(s):  
Water Column ◽  
Wave Energy ◽  
Degrees Of Freedom ◽  
Mooring Line ◽  
Oscillating Water Column ◽  
Flume Experiments ◽  
Large Wave ◽  
Wave Flume ◽  
Wave Conditions ◽  
University Of Florence

Floating oscillating water column (OWC) type wave energy converters (WECs), compared to fixed OWC WECs that are installed near the coastline, can be more effective as they are subject to offshore waves before the occurrence of wave dissipation at a nearshore location. The performance of floating OWC WECs has been widely studied using both numerical and experimental methods. However, due to the complexity of fluid–structure interaction of floating OWC WECs, most of the available studies focus on 2D problems with WEC models of limited degrees-of-freedom (DOF) of motion, while 3D mooring effects and multiple-DOF OWC WECs have not been extensively investigated yet under 2D and 3D wave conditions. Therefore, in order to gain a deeper insight into these problems, the present study focuses on wave flume experiments to investigate the motion and mooring performance of a scaled floating OWC WEC model under 2D wave conditions. As a preparatory phase for the present MaRINET2 EsflOWC (efficiency and survivability of floating OWC) project completed at the end of 2017, experiments were also carried out in advance in the large wave flume of Ghent University. The following data were obtained during these experimental campaigns: multiple-DOF OWC WEC motions, mooring line tensions, free surface elevations throughout the wave flume, close to and inside the OWC WEC, change in the air pressure inside the OWC WEC chamber and velocity of the airflow through the vent on top of the model. The tested wave conditions mostly include nonlinear intermediate regular waves. The data obtained at the wave flume of Ghent University, together with the data from the EsflOWC tests at the wave flume of LABIMA, University of Florence, provide a database for numerical validation of research on floating OWC WECs and floating OWC WEC farms or arrays used by researchers worldwide.

Overview on Oscillating Water Column Devices

2022 ◽  
Author(s):  
A.F.O. Falcão
Keyword(s):  
Water Column ◽  
Wave Energy ◽  
Important Class ◽  
Oscillating Water Column ◽  
Energy Converter ◽  
Energy Devices ◽  
New Concepts ◽  
Testing Techniques ◽  
Fixed Structure ◽  
And Control

Abstract. Oscillating-water-column (OWC) converters, of fixed structure or floating, are an important class of wave energy devices. A large part of wave energy converter prototypes deployed so far into the sea are of OWC type. The paper presents a review of recent advances in OWC technology, including sea-tested prototypes and plants, new concepts, air turbines, model testing techniques and control.

Ocean Wave Energy Conversion Devices Popular Today

1985 ◽  
Vol 9 (2) ◽  
pp. 105-113
Author(s):  
K.C. Watts ◽  
J.W. Graham
Keyword(s):  
Water Column ◽  
Wave Energy ◽  
Spectral Response ◽  
Oscillating Water Column ◽  
Energy Devices ◽  
Floating Raft ◽  
Ocean Wave Energy ◽  
The United Kingdom ◽  
Oil Crisis ◽  
Energy Conversion Devices

Wave energy is one source of alternate energy that has fascinated man’s imagination throughout history yet has alluded his ability to tap it economically for domestic use. Considerable interest in harnessing wave energy exists today in a number of parts of the world, prompted to a large extent by the oil crisis of 1973. This paper examines several wave energy devices which are currently being investigated in the United Kingdom, Japan, Norway and the U.S.A. Each is briefly examined in respect to its operating principles, efficiency, advantages, weaknesses and state of development. The devices discussed are: (1) the Kaimei, the floating ship off the coast of Japan; (2) Salter’s nodding duck with its gyroscopic reference frame; (3) the Lancaster flexible bag; (4) the SEA CLAM version of a flexible bag; (5) the NEL oscillating water column fixed rigidly to the ground; (6) the Vickers terminator and attenuator versions of the oscillating water column; (7) the Norwegian use of a “harbour” with an oscillating water column used to increase the device’s range of frequency response; (8) the latching buoy of Norway; and (9) the Bristol cylinder. Also presented are the studies at the Technical University of Nova Scotia of a two hinged floating raft, the DAM ATOLL of U.S.A. origin and a version of an oscillating water column device designed to increase its spectral response.

scholarly journals Hydrodynamic analysis of oscillating water column wave energy devices

2015 ◽  
Vol 1 (4) ◽  
pp. 405-419 ◽  
Author(s):  
Harry B. Bingham ◽  
Damien Ducasse ◽  
Kim Nielsen ◽  
Robert Read
Keyword(s):  
Water Column ◽  
Wave Energy ◽  
Oscillating Water Column ◽  
Hydrodynamic Analysis ◽  
Energy Devices
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