Journal
JOURNAL OF MARINE SCIENCE AND ENGINEERING
Volume 8, Issue 10, Pages -Publisher
MDPI
DOI: 10.3390/jmse8100771
Keywords
wave energy; Oscillating Wave Surge Converters; Power Take-Off; OpenFOAM; computer fluid dynamics; overset mesh
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Funding
- National Secretary of Higher Education, Science, Technology and Innovation (SENESCYT)
- Escuela Superior Politecnica del Litoral (ESPOL) of Ecuador
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To estimate the response of wave energy converters to different sea environments accurately is an ongoing challenge for researchers and industry, considering that there has to be a balance between guaranteeing their integrity whilst extracting the wave energy efficiently. For oscillating wave surge converters, the incident wave field is changed due to the pitching motion of the flap structure. A key component influencing this motion response is the Power Take-Off system used. Based on OpenFOAM, this paper includes the Power Take-off to establish a realistic model to simulate the operation of a three-dimensional oscillating wave surge converter by solving Reynolds Averaged Navier-Stokes equations. It examines the relationship between incident waves and the perturbed fluid field near the flap, which is of great importance when performing in arrays as neighbouring devices may influence each other. Furthermore, it investigates the influence of different control strategy systems (active and passive) in the energy extracted from regular waves related to the performance of the device. This system is estimated for each wave frequency considered and the results show the efficiency of the energy extracted from the waves is related to high amplitude pitching motions of the device in short periods of time.
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