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TECHNICAL PAPERS

By-Pass Air-Valve Control of an OWC Wave Power Plant

[+] Author and Article Information
A. F. de O. Falcão, L. C. Vieira, J. M. C. S. André

Mechanical Engineering Department, Instituto Superior Técnico, 1049-001 Lisbon, Portugal

P. A. P. Justino

Departamento de Energias Renováveis, Instituto Nacional de Engenharia e Tecnologia Industrial, 1600-545 Lisbon, Portugal

J. Offshore Mech. Arct. Eng 125(3), 205-210 (Jul 11, 2003) (6 pages) doi:10.1115/1.1576815 History: Received December 01, 2001; Revised July 01, 2002; Online July 11, 2003
Copyright © 2003 by ASME
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References

Figures

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As in Fig. 3, for M=6,Δt=0.2 s,α1=0.6,α2=0.33.(a): no signal noise in pressure measurements; (b): noise amplitude 4% of relative pressure.
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As in Fig. 3, for M=6,Δt=0.2 s,α1=0.6,α2=0.25
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As in Fig. 3, for M=∞ and Δt=0.1 s. (a): α1=1,α2=1; (b): α1=0.6,α2=0.33.
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Evolution of valve area A(t) and air pressure p(t) for optimal control. Here, and in Figs. 4 to 6, the thick line represents A(t) and the nearly horizontal lines represent pcr(t)
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Dimensionless plot of turbine torque Λ (thicker line) and efficiency η=Λ/(ΦΨ) versus pressure head Ψ
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Longitudinal cross-section of the plant

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