The paper deals with the numerical simulation of the performance of an oscillating-water-column (OWC) wave power plant equipped with a by-pass valve whose role is to prevent the turbine flow rate from exceeding the stall-free operating conditions. Continuous and step-wise valve area changes are considered, the second case corresponding to multi-element design. The adequacy of the valve and of its control is assessed through the gain in annual electrical energy and the total number of required valve strokes. The following items are separately analyzed: (i) number of (identical) valve elements; (ii) valve response time; (iii) signal noise level in chamber air-pressure measurements due to large-eddy turbulence; (iv) valve’s control algorithm.
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e-mail: falcao@hidro1.ist.utl.pt
e-mail: paulo.justino@mail.ineti.pt
e-mail: jmandre@hidro1.ist.utl.pt
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August 2003
Technical Papers
By-Pass Air-Valve Control of an OWC Wave Power Plant
A. F. de O. Falca˜o,
e-mail: falcao@hidro1.ist.utl.pt
A. F. de O. Falca˜o
Mechanical Engineering Department, Instituto Superior Te´cnico, 1049-001 Lisbon, Portugal
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L. C. Vieira,
L. C. Vieira
Mechanical Engineering Department, Instituto Superior Te´cnico, 1049-001 Lisbon, Portugal
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P. A. P. Justino,
e-mail: paulo.justino@mail.ineti.pt
P. A. P. Justino
Departamento de Energias Renova´veis, Instituto Nacional de Engenharia e Tecnologia Industrial, 1600-545 Lisbon, Portugal
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J. M. C. S. Andre´
e-mail: jmandre@hidro1.ist.utl.pt
J. M. C. S. Andre´
Mechanical Engineering Department, Instituto Superior Te´cnico, 1049-001 Lisbon, Portugal
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A. F. de O. Falca˜o
Mechanical Engineering Department, Instituto Superior Te´cnico, 1049-001 Lisbon, Portugal
e-mail: falcao@hidro1.ist.utl.pt
L. C. Vieira
Mechanical Engineering Department, Instituto Superior Te´cnico, 1049-001 Lisbon, Portugal
P. A. P. Justino
Departamento de Energias Renova´veis, Instituto Nacional de Engenharia e Tecnologia Industrial, 1600-545 Lisbon, Portugal
e-mail: paulo.justino@mail.ineti.pt
J. M. C. S. Andre´
Mechanical Engineering Department, Instituto Superior Te´cnico, 1049-001 Lisbon, Portugal
e-mail: jmandre@hidro1.ist.utl.pt
Contributed by the OOAE Division for publication in the JOURNAL OF OFFSHORE MECHANICS AND ARCTIC ENGINEERING. Manuscript received December 2001; final revision, July 2002. Associate Editor: S. Liu.
J. Offshore Mech. Arct. Eng. Aug 2003, 125(3): 205-210 (6 pages)
Published Online: July 11, 2003
Article history
Received:
December 1, 2001
Revised:
July 1, 2002
Online:
July 11, 2003
Citation
de O. Falca˜o, A. F., Vieira, L. C., Justino, P. A. P., and Andre´, J. M. C. S. (July 11, 2003). "By-Pass Air-Valve Control of an OWC Wave Power Plant ." ASME. J. Offshore Mech. Arct. Eng. August 2003; 125(3): 205–210. https://doi.org/10.1115/1.1576815
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