Combined Spar and Partially Porous Wall Fish Cage for Offshore Site
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Wang, CM
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Brisbane, Australia
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Abstract
Presented herein is a design concept for an offshore fish farm that combines a spar platform and a partially porous wall fish cage, named COSPAR fish cage. The design features a cylindrical cage with an open net for its bottom portion and a partially porous wall (with specially designed internal section to attenuate strong surface waves) for its top portion. A hybrid concrete and steel, deep draft spar platform carries a wind turbine and a control unit for power supply for remotely controlled fish farming operations. The central spar is connected to the top and bottom of the cylindrical fish cage by frame structures. The top frames are also used as walkways to access the central spar and the bottom frames as ballast compartments for adjusting the draft. By combining fish cage and spar, the meta centre height can be adjusted to induce a low frequency motion response. Moreover, an inherently unbalanced mooring tension problem of a mega-scale cage alone can be resolved by a 4 mooring line system attached to the central spar just below the bottom of the cage. This novel concept of a combined spar and fish cage design is able to overcome challenges of a high energy environment, lack of power supply, and stable mooring system for an offshore fish farm.
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EASEC16: Proceedings of The 16th East Asian-Pacific Conference on Structural Engineering and Construction, 2019
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© 2020 Springer. This is the author-manuscript version of this paper. It is reproduced here in accordance with the copyright policy of the publisher. Please refer to the publisher’s website for further information.
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Ship and platform structures (incl. maritime hydrodynamics)
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Chu, YI, Combined Spar and Partially Porous Wall Fish Cage for Offshore Site, EASEC16: Proceedings of The 16th East Asian-Pacific Conference on Structural Engineering and Construction, 2019, 2020