EXPERIENCE WITH DP-SYSTEMS ON BOARD

Transcription

1 EXPERIENCE WITH DP-SYSTEMS ON BOARD

2 SPEAKERS Head of Fleet, Ulla Bjørndal Møller & Development Manager Jesper Tang Kristensen Master Mariner, MSc in Maritime Technology Naval Architect

3 Who is A2SEA? What do we do? VESSELS ON DP DP EQUIPMENT PRACTICAL USE OF DP Corporate Presentation

4 Who is A2SEA?

5 HISTORY A PIONEERING COMPANY WITH UP-TO-DATE EQUIPMENT SEA POWER Conversion to semi-jack SEA ENERGY Conversion to semi-jack SEA JACK Jack up barge SEA WORKER Jack up barge CREW BOATS DONG Energy Ownership CABLE VESSELS CT Offshore Acquisition 2 nd generation 2012: SEA INSTALLER 2014: SEA CHALLENGER

6 A2SEA OFFICES HQ, FREDERICIA DENMARK A2SEA FACTS & FIGURES Frederikshavn Anholt A2SEA PROJECTS Horns Rev 2 Horns Rev 1 Sprogø Lillgrund Arklow Bank Robin Rigg Walney 1 West of Duddon Sands Gwynt Y Môr Burbo Bank OFFICE, LONDON UNITED KINGDOM Scoby Sands Greater Gabbard Gunfleet Sands Kentish Flats Teesside Sheringham Shoal Prinses Amalia Egmond an Zee London Array Thanet Rødsand 2 Baltic 1 Nysted OFFICE, HAMBURG GERMANY

7 EQUIPMENT LEARNING CURVE HISTORY /2014

8 Onshore Approx. 110 employees Offshore Approx. 270 employees A2SEA FACTS & FIGURES Our team

9 HISTORY OWN CREW OPERATE MAINTAIN

10 What do we do

11 SOLUTIONS: INSTALLATION SERVICE & LOGISTICS CABLES & CONNECTIONS Foundations Foundation and transition piece installation from t Sea fastening Lifting supervision Feeder solutions Strong existing partnerships with foundation manufacturers and installers

12 SOLUTIONS: INSTALLATION SERVICE & LOGISTICS CABLES & CONNECTIONS Turbines Wind Turbine Generators up to 6.15MW Up to 90m lift Single blade or full rotor installation Sea fastening Lifting supervision Feeder solutions Strong existing partnerships with turbine manufacturers

13 SOLUTIONS: INSTALLATION SERVICE & LOGISTICS CABLES & CONNECTIONS 3rd party Vessel Management Installation management Lifting supervision HSEQ management Site management Transport Harbour logistics Barges Tugs

14 SOLUTIONS: INSTALLATION SERVICE & LOGISTICS CABLES & CONNECTIONS Service Heavy lift Change of major component: - Gear boxes - Generators - Transformers - Blades - Platforms - Boat landings - Metmasts Crew Boat Management: - Walney - Anholt - Nysted - Horns Rev 2 - Lincs 4 x 24 pax. SWATH crew vessels

15 INSTALLATION SOLUTIONS: SERVICE & LOGISTICS CABLES & CONNECTIONS Cable Installation A2SEA holds 67% shares of CT Offshore CT Offshore is a specialised company within: Inter Array Cable Installation Post lay burial Survey and monitoring Maintenance Specialised fleet of 5 vessels In-house personnel and equipment Project experience: - Lincs - Greater Gabbard - Thanet - Kentish Flats - Walney - West of Duddon Sands

16 Vessels on DP

17 VESSELS & EQUIPMENT SEA INSTALLER Purpose build for offshore wind 2012 Self propelled, DP2 vessel 83m Legs, water depth: m Gusto GLC 800 ED crane, t 3350 m² deck space Installation of turbines: up to 10 x Vestas 3.0MW up to 8 x Siemens 3.6MW up to 5 x REpower 6.15MW

18 VESSELS & EQUIPMENT SEA CHALLENGER Purpose build for offshore wind 2014 Self propelled, DP2 vessel 83m Legs, water depth: m Gusto GLC 900 ED crane, t 3350 m² deck space Installation of turbines: up to 10 x Vestas 3.0MW up to 8 x Siemens 3.6MW up to 5 x REpower 6.15MW

19 DP EQUIPMENT

20 VESSELS & EQUIPMENT REQUIREMENT in SPECIFICATION 1A1 Self-Elevating Wind Turbine Installation and Crane Unit CLEAN DESIGN, NAUT-OSV(A), OPP-F, DYNPOS-AUTR, DPS2, E0, CRANE

21 VESSELS & EQUIPMENT Notations IMO equipment class 2 notations: DYNPOS AUTR where worst single failure is loss of 3 thrusters and 3 generators. Higher safety requirements = smaller weather window DPS 2 where worst single failure is loss of one thruster and one generator. Suitable safety requirements = bigger weather window A2SEA recommends in general to operate using DPS 2 in wind installation, because of more flexibility, but we can operate using DYNPOS AUTR if the customer or situation requires.

22 VESSELS & EQUIPMENT CONTROL OF VESSEL KONGSBERG Manual K-POS DP cjoy Auto Pilot K-Thrust Thruster 1 Thruster 2 Thruster 3 Thruster 4 Thruster 5 Thruster 6

23 VESSELS & EQUIPMENT KONGSBERG K-POS DP 1 pc DGPS (DPS132) 1 pc DGPS (DPS122) 1 pc CyScan (laser Mk4)

24 Electronic Propulsion System VESSELS & EQUIPMENT

25 VESSELS & EQUIPMENT Main propulsion system 6 x 3000 kw MAK engines, diesel electric power plant 3 x 3.8 MW Voith Schneider thrusters

26 VESSELS & EQUIPMENT Forward thrusters 1 x 1500 kw inline thruster, Voith Schnider 1 x 1700 kw tunnel thruster, Wärtsillä 1 x 2200 kw tunnel / retractable thruster, Wärtsilla

27 VESSELS & EQUIPMENT Aft. Bridge layout DP and ICSS, Kongsberg Jacking, MSC Gusto Engine controls, Siemens Vessel displacement, EIVA

28 PRACTICAL USE OF DP

29 VESSELS & EQUIPMENT SEA INSTALLER DP Modes When you re in DP autopos the system controls for-aft, sideways and heading (auto-surge/auto-sway/auto-head) movements according to the commands (input) given by the operator. If either of these movements is excluded from the system control, then you re not in DP anymore. With one or two of above option in use you re in DP Man. Joystick. If none selected you re in manual mode.

30 Color code VESSELS & EQUIPMENT

31 VESSELS & EQUIPMENT Use of DP on Approach We have been using DP autopos for approaching/ positioning the installations. We remain in DP autopos until we are sure that we good penetration/ weight on all the legs before we change to DP joystick and after checking that no force is needed to keep position we go to manual and then stop of the thrusters.

32 VESSELS & EQUIPMENT Use of DP on Departure We have been using DP.joystick for leaving the installations, where the system is controlling the heading and depending on the position of the installation (aft or port) either sway or surge. We control the movement in a straight line away from the installation.

33 VESSELS & EQUIPMENT Use of DP in the wind industry When we are clear of the installation we shift to the next position in joystick or autopos mode and before making the final approach we stop for at least 20 min on the desired heading in DP autopos to build up the model. (the latter part is what takes the time) You can argue that DP makes operation more safe, and for an inexperienced officer or during bad weather it will most likely be just as quick or even quicker than if in manual mode. A person very experienced in handling a vessel with several thrusters, as we have, might be able to do it quickly too but this is very individual. It all comes down to experience.

34 VESSELS & EQUIPMENT Clients and DP Our clients think DP is a wonderfull tool, but unfortunately, they do not understand the implications. Redundancy Build up of DP model In the wind industry the Marine Warranty Surveyor is the people with influence on our operation. We have a nice tool and we know how to use it and that s also fine with us (makes it a lot easier for us ).

35 VESSELS & EQUIPMENT Use of Thrusters and DP On the first installation we used all thrusters but that was way overkill in normal weather conditions so, we haven t used all of the fwd thrusters in the subsequent installations. Final approach/ positioning and leaving again is going very smooth in DP, but I think that shifting between sites is taking a bit more time than it would do if the manoeuvres were done in manual, especially because the DP system needs time to build a model.

36 VESSELS & EQUIPMENT DP works In wind/current close to our operational max the DP worked very well able to keep position within ½ mtr and in less aggressive environment (current and wind) the vessel keeps position within 0,1-0,2 mtr. The downside is, when working in DP, it is bit difficult to get to learn how the vessels handles in full manual handling, and we do have limited time in our operational timetable to train, as we do arrival and departure in port on joystick mode.

37 Thank you!