Offshore Fish Farming

Wang, Chen; Chu, Y.I.; Baumeister, Joerg; Zhang, Hong; Jeng, Dong‐Sheng; Abdussamie, Nagi

doi:10.1201/9781003184287-4

Cited by 5 publications

(8 citation statements)

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“…For the SeaFisher, the net is attached to the HDPE frame structure. In order to strengthen and stiffen the frame structure and the Kikkonet, a diagrid rod system is installed as shown in Figure 1 (10). The diagrid is made of glass fibre-reinforced polymer (GFRP), which is a durable but lightweight material used for marine structures.…”

Section: Description Of the Seafishermentioning

confidence: 99%

“…Two contrasting design philosophies for offshore fish pens have emerged due to the highly energetic offshore environment and deep water. One design philosophy is to make a fish pen with significant size, rigidity, and strength to withstand the strong waves, currents, and winds [10]. The pens with large net depths allow fish to swim to the pen bottom as the cultured water volume contracts under strong waves passing through the pen.…”

Section: Introductionmentioning

confidence: 99%

“…The pens with large net depths allow fish to swim to the pen bottom as the cultured water volume contracts under strong waves passing through the pen. Examples of such fish pens are Ocean Farm 1 [11,12], Havfarm 1 [13], Shenlan 1 [14], Zhenyu 1 [10], and Dehai 1 [15]. These large offshore fish pens have been built in China with steel as the preferred structural material.…”

Section: Introductionmentioning

confidence: 99%

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SeaFisher—A Submersible High-Density Polyethylene Offshore Fish Pen

Wang,

Chu,

Baumeister

et al. 2023

JMSE

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Moving offshore for fish farming poses challenges due to the more energetic sea environment. In this paper, a novel offshore fish pen design named SeaFisher has been proposed. The SeaFisher comprises modular cubic pens that are assembled to form a large 2 × n array offshore fish pen. Its frame structure is made from HDPE, making it flexible and durable against the harsh sea environment. Specially tailored connection brackets and connector pods are designed to assemble bundles of HDPE pipes forming the SeaFisher structure. The SeaFisher is moored using a single point mooring to minimize environmental and collision loads, and for improved waste dispersal. More importantly, the SeaFisher possesses ballast tubes positioned on the top surface to allow it to submerge to a desired water depth to dodge the strong surface waves during severe weather events. This paper presents the engineering design details and hydroelastic analysis of the SeaFisher. Based on a hydrostatic analysis, suitable materials were chosen for the various components of the SeaFisher, and the components were appropriately sized up. By using the software AquaSim v.2.17.3, the SeaFisher’s hydroelastic responses under different sea-state conditions were investigated. It is found that the designed SeaFisher structure and mooring system are adequate with respect to strength and stiffness for the considered sea-state conditions of up to 8 m significant wave height and 0.8 m/s current speed. It is expected that the SeaFisher will be a game changer for offshore fish farming due to its cost-effectiveness and ability to survive in severe storms.

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Section: Description Of the Seafishermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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SeaFisher—A Submersible High-Density Polyethylene Offshore Fish Pen

Wang,

Chu,

Baumeister

et al. 2023

JMSE

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“…With diminishing appropriate fish farming locations nearshore, due to contested sea space utilizations and stressed ecosystems from massive fish faeces and uneaten feed, fish farm operators have started to install their fish farming infrastructure at more exposed/offshore sites [1][2][3][4]. These offshore sites offer large water columns because of deeper waters that can aid in waste dispersion, provide more pristine water and cooler water temperatures, as well as better return on investment from a larger scale of fish production [5][6][7]. On the other hand, offshore fish farming requires the use of large and complex fish pens in order to withstand the energetic environment.…”

Section: Introductionmentioning

confidence: 99%

“…They range from structurally advanced versions to submerged structures, and some have even integrated offshore fish pens with offshore renewable energy production devices. More information and pictures of the various offshore fish pen designs and recent developments can be found in a review paper written by Chu et al [6], and a book chapter by Wang et al [7]. However, a consensus has not been reached as to which of these new offshore design concepts will become globally accepted and give 2 of 29 confidence in sustainable and profitable offshore fish farming to the aquaculture operators.…”

Section: Introductionmentioning

confidence: 99%

Offshore Fish Farms: A Review of Standards and Guidelines for Design and Analysis

Chu

Wang

Zhang

et al. 2023

JMSE

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While moving fish farms to offshore sites can be a more sustainable way to expand farmed fish production, the fish pens have to contend with a harsher environment. Thus, it is necessary to draw on offshore engineering competences for designing and analysing the offshore fish farming infrastructure. This paper reviews existing design and analysis guidance from maritime classification and national/international authorities that can be applicable for offshore fish farms. Based on the existing design guidelines, a review of design criteria for offshore fish farms under the following subtopics is provided: design life, design environmental loads, combining environmental loads, and miscellaneous load conditions. This review on the global performance analysis procedures and methods is presented based on practices used for neighbouring industries, such as offshore oil and gas and wind energy production, under the following subtopics: hydrostatic analysis, hydrodynamic analysis, and mooring system analysis with introducing theoretical background and modelling techniques. This paper also highlights limitations and cautions when using these design and analysis methods. Providing this comprehensive information, as well as commentary on their applications, will help engineers and designers to develop offshore fish farming infrastructure with confidence.

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Advances in Research and Developments on Offshore Aquaculture and Renewable Energy Production

Wang,

Nguyen

2023

Lecture Notes in Civil Engineering

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Offshore Fish Farming

Cited by 5 publications

References 0 publications

SeaFisher—A Submersible High-Density Polyethylene Offshore Fish Pen

SeaFisher—A Submersible High-Density Polyethylene Offshore Fish Pen

Offshore Fish Farms: A Review of Standards and Guidelines for Design and Analysis

Advances in Research and Developments on Offshore Aquaculture and Renewable Energy Production

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