OFFSHORE CAGE FARMING Experimental Study under influence of waves - PowerPoint PPT Presentation

NEW BIRD NET DESIGN FOR OFFSHORE CAGE FARMING Experimental Study under influence of waves Presented by : ALESSANDRO CIATTAGLIA Sales & Marketing Manager BADINOTTI GROUP Spa

TABLE OF CONTENT Experimental Study Presentation Introduction Experimental Setup Methodology Measurement & Analysis Results

About Us

ABOUT US 04 Serving your Fishery and Fish Farming Businesses since 1910 OFFSHORE MARICULTURE Barcelona CONFERENCE 6-8 April 2016 BADINOTTI GROUP provides: Cage Aquaculture Turnkey Project 01 Feasibility Study for Fish Farming Business 02 Cage Nets, Anti-Predator Nets 03 Cage Mooring Design and Calculation 04 Aquaculture Equipment 05 Net Services, Treatments and Maintenance 06 Nets for Commercial Fishing 07 PVC Floats, Twine and Ropes 08 1910 2000 2009 1950 HDPE Boats 09

P WHERE WE ARE 05 Badinotti Marine Equipment Italy HDPE Boats Worldwide Factories and Branches H Badinotti Group - Italy Head Office Badinotti Slovakia P Fish Farming Nets – Fishing Nets Sport and Safety Nets P Badinotti Peru Fishing Nets P Badinotti Chile Fish Farming Nets Badinotti North America SA Fish Farming Nets – Fishing Nets Badinotti Net Services Chile SV Sport and Safety Nets Fish Farming Net Service SV P = Production Badinotti Net Services Canada SV = Services SV Badinotti Marine Equipment Chile Fish Farming Net Services SA = Sales Office Mooring Design and Installation Cage and Boat Tugging

BADINOTTI GROUP TURNOVER 06 Year 2014 – USD OFFSHORE MARICULTURE Barcelona CONFERENCE 6-8 April 2016 11.000K 8.500K Europe, Africa & North America Middle East 21.500K South America Fishing Aquaculture Services

BADINOTTI GROUP HUMAN RESOURCE 07 Year 2015 OFFSHORE MARICULTURE Barcelona CONFERENCE 6-8 April 2016 80 100 Canada Europe 350 Peru 400 Chile

INTRODUCTION 08 Problem Solving: Bird Net Protection in High Energy Site OFFSHORE MARICULTURE Barcelona CONFERENCE 6-8 April 2016 Solution Focus : Problem Focus : Net has stressing and stretching movements and consequently rips off Netting panels cut and assembled in diamond mesh shape Improving netting strength generates breaks on the handrail pipes More elastic behaviour generates a lighter netting requirement Netting falls into the water and consequently the fouling grows No cross top ropes are needed so less breaks risk on the handrail UV radiation influence A lighter netting requires a simpler support Special Resin Treatment Problem Problem Test Results Clarification Idea Generation Idea Selection

Experimental Setup

EXPERIMENTAL SETUP 10 The Flume Tank OFFSHORE MARICULTURE Barcelona CONFERENCE 6-8 April 2016 Technical information: Dimensions Overall: L:30m x H:6m x W:8m Measuring section: L:21.3m x H:2.7m x W:8m. Volume of water: 1200 m3. Windows: W20m x Η3m Propulsion Four propellers driven by AC motors of 55 KW generate the flow. The maximum speed of water thorough the test section is 1 m/s. The bottom of the test section is covered by a conveyer belt type made of nylon. The speed of the conveyer belt is adjustable and can be locked with speed of the water or can be driven at a set speed.

EXPERIMENTAL SETUP 11 Experiment performed in a model scale 1:25 OFFSHORE MARICULTURE Barcelona CONFERENCE 6-8 April 2016 Wave Generator HD Video Cameras High definition surveillance cameras were The waves used for the experiment had a positioned at different viewpoints significant height of 5.5 m and a period of 7 seconds. Flume Tank Floating Rings A flexible floating ring with a diameter of 2 meters The sketch above shows how the net cage (scale 50mt) was used to support the bird net. The system is set up in the flume tank. The distance buoyancy of the ring was obtained using a cylinder of between the mooring points is 7,5 m waterproof rubber foam tread on a thin steel rod. corresponding to 188 m in full scale this implies The floating ring was moored using a multi legged that only a part of the mooring lines are modelled in the flume tank. It is however connection in each corner of a surrounding square assumed that this will only have minor influence rope frame. This frame was supported by mooring of the performance of the floating rings. lines attached to the walls of the flume tank.

EXPERIMENTAL SETUP 12 Experiment performed in a model scale 1:25 OFFSHORE MARICULTURE Barcelona CONFERENCE 6-8 April 2016 Bird Nets Strain Gauges Two strain gauges were mounted on the bird net, one in Two Nylon nets were tested. A traditional design with the front of the net and one in the back. The strain essential square meshes and a new design with gauge was secured to the handrail of the floating ring diamond meshes all along the floating ring. and the other end to the netting Hamster Wheel Motion Tracking The bird net was equipped with 16 reflectors. A hamster wheel with a diameter of 60 cm (scale 13mt) was used. It was secured in the Eight reflectors on the edge of the bird net towards middle of the floating ring with four lines the floating ring. Five reflectors on the net, positioned over the Hamster Wheel. Three reflectors between the floating ring and the hamster wheel on the bird net closest to the incoming waves.

Methodology

METHODOLOGY 14 OFFSHORE MARICULTURE Barcelona CONFERENCE 6-8 April 2016 Initiate the Wave Wait a minute for the wave to stabilize Log a simultaneous time series of the motion of the 16 reflectors. The length of the time series is 100 seconds (model scale values). This will correspond to a 500 sec. period in full scale. Make a video footage of the behavior of the system consisting of the floating ring and the Bird net.

Analysis

BIRD NETS LAYOUT COMPARISON 16 Video Camera Recording OFFSHORE MARICULTURE Barcelona CONFERENCE 6-8 April 2016 VS Traditional Bird Net Design New Bird Net Design

BIRD NETS LAYOUT COMPARISON 17 Diameter of the Flexible Floating Rings OFFSHORE MARICULTURE Barcelona CONFERENCE 6-8 April 2016 VS Diameter Variation +/- 1 mt +/- 4mt 46,9mt 50,5mt Perpendicular Wave 44,1mt 52,2mt In Wave Direction 47,2mt 50,2mt 46,6mt 54,1mt

BIRD NETS LAYOUT COMPARISON 18 Tension on the Flexible Floating Rings OFFSHORE MARICULTURE Barcelona CONFERENCE 6-8 April 2016 VS Average Tension -706 kg -151kg 85 kg -471kg -2148 kg 1688 kg In Front -921 kg 307 kg In Aft -614 kg 768 kg -614 kg 1075 kg

Results

RESULTS 20 Bird Nets Comparison Test OFFSHORE MARICULTURE Barcelona CONFERENCE 6-8 April 2016 The diameters measured MIN 47m and MAX 56 m. However, the range (min to max) is 3 meters for the traditional design, while the range is about 8 meters for the new design. The deformation of the floating ring can be more than doubled when a bird net of the new design is attached to the ring compared to the bird net of the traditional design; this is mainly due to the difference in the shape of the meshes in the two design. The Tension Forces caused by the front waves is decreased on average by a 1/3 from -707 kg to -471 kg with the new design.

WHAT THE RESULTS MEAN 21 Advantages in the new design OFFSHORE MARICULTURE Barcelona CONFERENCE 6-8 April 2016 Due to the higher capacity to withstand Using a lighter birdnet means saving tension forces (approx 3 times more), it Strength Weight buoyancy on the birdnet support and could be possible to use light netting keeping the netting always above the waterline level easier. Lighter netting in bird net assembling Price means cheaper price. Furthermore the new design uses same work time and material of the traditional design.

THANK YOU VERY MUCH For Your Kind Attention BADINOTTI GROUP spa Viale Ortles, 5 – 20139 MILANO - ITALY +Tel. +39.02.5391070 +Mob. +39.348.3856441 OFFSHORE MARICULTURE Barcelona alessandro.ciattaglia@badinotti.com CONFERENCE 6-8 April 2016