The mooring system plays a key role in a floating offshore wind turbine: it connects the floating structure to its anchor on the seabed and it is designed to prevent the platform from drifting under the action of wind, waves and currents. The layout of the mooring system is strictly connected to the installation site: in the first place it depends on the bathymetry and the type of seabed which conditions the type of anchor that can be used; secondly by the wind and waves loads in extreme sea states. To properly design the mooring system, three different configurations are proposed and discussed, respectively adapting catenary, taut leg and semi-taut methodologies for a floating offshore wind turbine located near the island of Pantelleria, in Sicily. For each configuration, the Hexafloat foundation, developed by Saipem, is considered. Important design constraints such as how large the nominal sizes are, how long the mooring lines are, how far the anchor points are located, are demonstrated in detail. The material used will range from steel chains and wires to polyester ropes, to grant economically viable solutions.

Mooring System Design and Analysis for a Floating Offshore Wind Turbine in Pantelleria / Ghigo, Alberto; Niosi, Francesco; Paduano, Bruno; Bracco, Giovanni; Mattiazzo, Giuliana. - Volume 11: Wind Energy:(2022). (Intervento presentato al convegno ASME Turbo Expo 2022 Turbomachinery Technical Conference and Exposition tenutosi a Rotterdam nel 13 - 17 June 2022) [10.1115/GT2022-83219].

Mooring System Design and Analysis for a Floating Offshore Wind Turbine in Pantelleria

Ghigo, Alberto;Niosi, Francesco;Paduano, Bruno;Bracco, Giovanni;Mattiazzo, Giuliana
2022

Abstract

The mooring system plays a key role in a floating offshore wind turbine: it connects the floating structure to its anchor on the seabed and it is designed to prevent the platform from drifting under the action of wind, waves and currents. The layout of the mooring system is strictly connected to the installation site: in the first place it depends on the bathymetry and the type of seabed which conditions the type of anchor that can be used; secondly by the wind and waves loads in extreme sea states. To properly design the mooring system, three different configurations are proposed and discussed, respectively adapting catenary, taut leg and semi-taut methodologies for a floating offshore wind turbine located near the island of Pantelleria, in Sicily. For each configuration, the Hexafloat foundation, developed by Saipem, is considered. Important design constraints such as how large the nominal sizes are, how long the mooring lines are, how far the anchor points are located, are demonstrated in detail. The material used will range from steel chains and wires to polyester ropes, to grant economically viable solutions.
2022
978-0-7918-8613-7
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2972748