Experience and Future Potential of the Oblique Icebreaker
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1 SHIP Design & Engineering CONSULTING & Project Development ICE MODEL & Full Scale Testing OFFSHORE Development Experience and Future Potential of the Oblique Icebreaker Mika Hovilainen Project Manager Aker Arctic Technology Inc 9 March, 2016 Slide 1
2 Content Background of oblique icebreaker development Aker ARC 100 IB Baltika Concept overview Full scale ice trials of IB Baltika First operational experiences of Oblique icebreaker Possibilities of Oblique Icebreaker 9 March, 2016 Slide 2
3 Original Development Project established in 1997 to develop an icebreaker which could provide independent assistance to 40m beam vessels as a innovation campaign in MARC Oil recovery function by using vertical side as a sweep arm was founded Mar-16 Slide 3
4 Oblique Principle Asymmetric hull form 2 Azimuthing thrusters in aft 1 Azimuthing thruster in bow Icebreaking possible also sideways Highly maneuverable Enables breaking of wide channels (wider than the ship itself) Efficient oil spill recovery 9 March, 2016 Slide 4
5 Aker ARC 100 Icebreaker Baltika Main Data Concept Aker ARC 100 Owner Rosmorrechflot Operator FGI Gosmorspassluzhba Port of registry Saint Petersburg, Russia Builder Arctech Helsinki Shipyard, Finland Shipyard Yantar JSC, Kaliningrad, Russia Ordered 2011 Cost 76 MEuro Delivery 2014 Operation area Gulf of Finland Main Tasks - Oil spill response in ice and open water conditions - Icebreaking - Environment monitoring - Salvage operations and emergency towing - Commercial towing and tug operations - Fire fighting of external fires - Education, training 9 March, 2016 Slide 5
6 Aker ARC 100 Icebreaker Baltika Main Particulars Length, overall Breadth, overall Breadth, design waterline Depth to main deck Draught, design waterline Draught, maximum Power plant: Wärtsilä 9L26 Propulsion: Steerprop SP60PULL (1 in bow + 2 in stern) Value 76.4 m 20.5 m 19.2 m 9.0 m 6.3 m 7.0 m 3 x 3000 kw 3 x 2500 kw Main Particulars Icebreaking capability (F.Sc results): 3.8 knots in 1.0 m level ice ahead and 5.3 knots astern 9 knots in 0.6 m level ice ahead and astern 2 knots in 0.6 m level ice creating 63 m wide channel Performance in open water (F.Sc results): Trial speed 15.4 knots Bollard pull 86 tons RS Class notations: KM, Icebreaker6, [1], AUT1-ICS, OMBO, FF3WS, EPP, DYNPOS-1, ECO-S, Oil recovery ship (>60 C), Salvage ship, Tug 9 March, 2016 Slide 6
7 Ice trials of Icebreaker Baltika, March, 2016 Slide 7
8 Performed tests on trial voyage Level ice test; ahead, astern and in oblique mode Performance: in floe ice in channel in ridge field Turning tests in level ice Breaking out of the channel tests Various operability tests 9 March, 2016 Slide 8
9 First tests March, 2016 Slide 9
10 First tests March, 2016 Slide 10
11 First tests March, 2016 Slide 11
12 Level ice tests, Hi~40 cm, March, 2016 Slide 12
13 Level ice tests ahead, Hi~40 cm, March, 2016 Slide 13
14 Level ice tests astern, Hi~40 cm, March, 2016 Slide 14
15 Level ice tests in oblique mode, Hi~40 cm, March, 2016 Slide 15
16 Level ice tests, Hi~90 cm, March, 2016 Slide 16
17 Level ice tests astern, Hi~90 cm, March, 2016 Slide 17
18 Level ice tests, Hi~122 cm, March, 2016 Slide 18
19 Level ice tests ahead, Hi~122 cm, March, 2016 Slide 19
20 Level ice tests astern, Hi~122 cm, March, 2016 Slide 20
21 Test results of level ice, ahead and astern 9 March, 2016 Slide 21
22 Test results of level ice, Oblique mode 9 March, 2016 Slide 22
23 Turning test results Date Test # Direction Turn direction Ice thickness Water Depth Speed Diameter Average ROT [cm] [m] [kn] [m] [deg/min] Ahead to STB Ahead to port Astern to STB Astern to port Astern to port March, 2016 Slide 23
24 First operational experiences 1. Sea keeping behavior Concerns Asymmetric hull form causes rolling also in ahead waves Inclined side acts as a wave power plant Asymmetric rolling behavior High GM-level, low rolling period, high accelerations Slamming in bow Design solutions Extensive model testing done to optimize solutions Special bilge keel construction developed Roll reduction tank implemented Results Sailed around Norway in winter storm, max wind speed 30 m/s, significant wave height up to 9 meter, average speed of 10 knots Barents sea conditions in 3-4 m significant wave height, average speed of knots 9 March, 2016 Slide 24
25 Barents sea, wind speed of 15 m/s 9 March, 2016 Slide 25
26 First operational experiences 2. Course stability Concerns Special hull form with minor parallel mid body, no skeg, is course unstable Maneuvering characteristics are not symmetric Does it go straight a head with wheel angle 0 Design solutions Maneuverability and course stability studied in model basin Special autopilot developed for open water transit Special DP joystick solution developed for oblique operations, in ice and open water Results Autopilot keeps course very well Manual maneuverings requires concentration DP joystick works extremely well in ice 9 March, 2016 Slide 26
27 Time history of day in storm 9 March, 2016 Slide 27
28 First operational experiences 3. Ice capability and observations in ice operations Performance to astern significantly better than ahead mode Level ice breaking capability in thick level ice Performance in ridge field Performance under heavy compression Maneuverability in ice is exceptional Requires significantly less power to identical performance than typical icebreaker => low fuel consumption, low emissions 4. Concern regarding escort icebreaking in oblique mode 9 March, 2016 Slide 28
29 Escort icebreaking in oblique mode 9 March, 2016 Slide 29
30 Toughest ice condition in the voyage 9 March, 2016 Slide 30
31 Toughest ice condition in the voyage 9 March, 2016 Slide 31
32 Potential for Oblique Icebreaker Benefits of asymmetric hull form and propulsion arrangement Maneuverability of icebreaker to new level Ice resistance lower than traditional icebreaker solution Icebreaking of wide channel is possible Provides possibility to new operational modes Disadvantageous of asymmetric hull form Behavior in heavy waves Course stability in open water Less displacement lower deadweight lower cargo capacity Challenges in dry docking 9 March, 2016 Slide 32
33 Other Oblique Icebreaker concepts available Main Particulars Aker ARC 100 A Value Length, overall 87.5 m Breadth, overall 22.2 m Breadth, design waterline 20.0 m Depth to main deck 10.0 m Draught, design waterline 7.0 m Draught, maximum 7.5 m Power plant (Tier III) kw Propulsion 3 x 3500 kw Deadweight at max draught 2000 tons Bollard pull about 105 tons Ice class Icebreaker7 or Icebreaker PC3 Level icebreaking capability 2 knots in 1.5 m level ice ahead and astern 4 knots in 0.6 m level ice creating 50 m wide channel Main Particulars Aker ARC 100 HD Value Length, overall 98.0 m Breadth, overall 26.0 m Breadth, design waterline 24.4 m Depth to main deck 11.0 m Draught, design waterline 8.0 m Draught, maximum 8.5 m Power plant (Tier III) kw Propulsion 3 x 6500 kw Deadweight at max draught 3200 tons Bollard pull about 200 tons Ice class Icebreaker8 or Icebreaker PC2 Level icebreaking capability 2 knots in 2.1 m level ice ahead and astern 8-9 knots in 0.6 m level ice creating 50 m wide channel 9 March, 2016 Slide 33
34 Summary Oblique icebreaker Baltika proved excellence of the concept Performance in ice exceeds the expectations Oblique icebreaking is possible and feasible alternative to create wide channel or break wide areas efficiently Maneuverability in ice is unique Adequate open water characteristics Seakeeping better than traditional icebreaker Course stability manageable Oblique icebreaker concept ready for real heavy icebreaker applications 9 March, 2016 Slide 34
35 Thank You! 9 March, 2016 Slide 35
36 Copyright Copyright of all published material including photographs, drawings and images in this document remains vested in Aker Arctic Technology Inc and third party contributors as appropriate. Accordingly, neither the whole nor any part of this document shall be reproduced in any form nor used in any manner without express prior written permission and applicable acknowledgements. No trademark, copyright or other notice shall be altered or removed from any reproduction. 9 March, 2016 Slide 36
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