Publicações

Zaroudi, H.G., Rezanejad, K. e Guedes Soares, C. (2015), “Assessment of mooring configurations on the performance of a floating oscillating water column energy convertor”, Renewable Energies Offshore, Guedes Soares, C. (Ed.), Taylor & Francis Group, London, UK, pp. 921-928

In this paper, the motion performance of a moored backward bent duct buoy floating oscillating water column is analyzed in finite water depth based on the linearized water wave theory in two dimensional Cartesian coordinate system. A quasi-static analysis of catenary mooring system has been applied and coupled with the hydrodynamic model of the floating OWC in frequency domain. In this regard, an iterative approach based on the method proposed by Loukogeorgaki and Angelides (2005) has been developed for imposing the stiffness of mooring lines in three directions (heave, surge and pitch); this feature enables the coupled model to correctly taking into account the non-linear behavior of mooring lines in terms of convergence of the displacements of fairlead in each frequency range. The numerical code implements an algorithm which has the ability to derive the response of floating body with respect to force-excursion of fairlead point. Eventually, the minimum length of the line overlying on the seabed is estimated and considered as a criterion in order to avoid tension forces in drag embedded anchors. Two sets of different mooring configurations are compared with each other in terms of their influence on the motion responses of coupled system and the power extraction efficiency of the floating OWC has been evaluated and discussed.

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