Integrated EU-MOP System Design

1. Integrated EU-MOP System Design Yiannis VentikosDept. of Engineering ScienceUniversity of Oxford Madrid, Spain 24 January 2008

2. “A scalable number of autonomous vessels, operating in a coordinated manner, capable to combat a variety of oil-spills in a multitude of marine environments” Specification of the EU-MOP system

3. System vs. Unit Design The EU-MOP design process has been an unusualengineering task: We have put together a system aimed at fulfillinga pre-specified task; The unitscomprising the system are complex devices with specificationsthat are part of the design effort. System Level (strategic/operational) Unit Level (technical)

4. Strategic System Unit EU-MOP design levels

5. Conceptual design approach Nantes Meeting, June 2005 Input information • Oil spill characteristics • Oil types • Age • Spill dimensions • quantity/volume • surface area, shape • Spill distribution • Environmental conditions Determine • Preliminary design • Unit volume, weight • Main characteristics • Manufacture materials • Power consumption Action Time Decide Most probable operating policy Number of Drones

6. Catamaran integrated design

7. Strategic level

8. Strategic level Units allocation for confronting spillsin the south of Spain (Mediterranean) Type 4: 2 units Type 2: 14 units

9. EU-MOP Artificial Intelligence needs to perform systems operations: search-and-follow the slick decide on optimal collection strategy loading and unloading sequences, etc… System/swarm level

10. Unit level Two design classes: Catamaran & Monocat Three sizes: Large – Medium – Small Large catamaran Large monocat Small EU-MOP

11. Design of catamaran EU-MOP Large EU-MOP model Length 3.20 m Breadth 2.30 m Fore hull clearance 0.95 m Draught 0.93 m Displacement (full-load) 3563 kg Medium EU-MOP model Length 3.00 m Breadth 1.88 m Fore hullclearance 0.68 m Draught 0.80 m Displacement (full-load) 2582 kg Main features: Autonomy 24h Energy production Diesel Generator Oil recovery Folding belt skimmer + oil storage tank Propulsion 2 x Azimuthing thrusters Trim adjustment No ballasts

12. Design of monocat EU-MOP MONOCAT - Large Principle characteristics LOA 3.5 m LWL 3.5 m BOA 2.3 m Depth 1.3 m Fore hullclearance 1 m Air draft 3.45 m Other features: Autonomy 24h Energy production Diesel Generator Oil recovery Folding belt skimmer + 2m3 oil tank Propulsion 2 x Azimuthing thrusters Trim adjustment 2x 125l water ballasts Anti capzising volume (mast)

13. Design of monocat EU-MOP MONOCAT - Large Hull Design features: - Allows for skimmer fitting and good oil canalization. - Provides enough volume for oil storage and equipment fitting. - Minimize drag. - Minimised change in draft with increasing loading. - Centre of volume located slightly aft for minimizing trim with increasing loading. Hydrostatics & stability (preliminary) Displ (kg) Wetted Draft (m) surf (m²) Lightship 1735 13.2 0.45 50% Load 2730 15.6 0.60 100% Load 3335 17.5 0.72

14. Design of monocat EU-MOP MONOCAT - Medium Principle characteristics LOA 2.4 m LWL 2.4 m BOA 1.9 m Depth 1.10 m Fore hull clearance 0.7 m Air draft 2.13 m Other features: Autonomy 24h Energy production Diesel Generator Oil recovery Folding belt skimmer + 1.4 m3 oil tank Propulsion 2 x Azimuthing thrusters Trim adjustment 2x 90l water ballasts Anti capzising volume (mast)

15. Design of monocat EU-MOP MONOCAT - Medium Hull Design features: Parametric scaling from Large unit’s Hull with specific targets: -Length constrained by 40’ container size -Increased freeboard / Length ratio -Increased Breadth / Length ratio Hydrostatics & stability Displ (kg) Wetted Draft (m) surf (m²) Lightship 1180 8.4 0.48 50% Load 1750 9.8 0.65 100% Load 2280 12.4 0.80

16. Design of small EU-MOP Small Unit - presentation Dimensions LOA: 1.20 m - BOA: 1.10 m - Depth: 0.7 m Max speed: 3 kts - recovery speed: 0.7 kts Oil tank capacity: 0.19 m3 Skimmer type Ro Clean – DBD 5 Single bank of 10 discs – 295 mm Diameter Recovery capacity (max): 5-7 tonnes / hr Energy system Battery pack type: LiFePO Propulsion system 2 x fthrusters To be determined

17. Unit design: propulsion resistance EU-MOP Novel Designs • No documented resistance correlations • Accurate estimation  Towing tank model tests • Study of oil/emulsion effects  CFD simulations

18. 900% 5 cm Viscosity increase Resistance increase 21.5% Fouling and oil-layer simulations • Estimate the resistance increase when: • Navigating through floating oil film of 5 cm

19. Unit design: energy source

20. Unit design: propulsion & steering Connection to Propulsion Motor Steering Drive Shaft Locking Screw Sealed Thrust Race Teflon Face Grub Screw Bearing Retention Ring Needle Bearing

21. Unit design: large catamaran manoeuvring Effect of Speed Effect of Loading Condition Effect of Nozzle Deflection Angle NDA: Nozzle Deflection Angle (°)

22. Unit design: Artificial Intelligence Controls and sensors • DGPS • Obstacle detection / collision avoidance system • Depth sensor • Compass • Oil-in water sensor • Level indicators for fuel & storage tanks • Radio-based communication system • Embedded control processor/computer

23. EU-MOP storage/logistics

24. Outlook and Future Challenges The EU-MOP system presents us with a series ofunique features in terms of versatility, scalability,efficiency and user-friendliness. The EU-MOP project has produced a preliminarydesign that spans the system-to-unit range andsets the ground for further development of theconcept. The ground is ripe for moving to the next stage:finalising a prototype design and runningtesting to demonstrate the advanced featuresof the EU-MOP concept.