1. Azipod® Energy Efficiency In Marine Propulsion
Jukka Varis, Vice President Technology Azipod, Helsinki, August 30, 2011
Azipod® Energy Efficiency In Marine Propulsion

2. Azipod® concept Steering Drives Cooling Air Unit Slipring Unit
Steering Motor
Propulsion Module
Steering Module
© ABB Group
April 8, 2019 | Slide 2

3. Azipod® propulsion module
Shaft seal
Non-drive-end bearing
Electric motor
Drive-end bearing
© ABB Group
April 8, 2019 | Slide 3

4. Azipod vs. shaftline propulsion
Conventional diesel- elctric propulsion
Azipod propulsion
Brief introduction of two identical sister vessels.
Note hull form was not modified to suit Azipod

5. Power plant concept, optimizing fuel consumption
Gen 2
Gen 3
Gen 4
4 Gens are on -
line all the time
The engines run at constant speed and optimum number of engines can be selected to minimize the specific oil consumption
Gen 1
Gen 2
Gen 3
Gen4
© ABB Group
April 8, 2019 | Slide 5

6. Benefits in hydrodynamics
Pushing propeller
Uneven wakefield for the propeller due to disturbances from hull, strut and shaft bracket
Added resistance from appendages such as rudders, shaft brackets and stern thrusters
Optimum wakefield due to
Pulling propeller
Lack of shaft line and shaft brackets etc.
Location of the pod unit
Due to power plant priciple and lack of long shaftlines there is freedom to optimize the hull form
No separate stern thrusters and rudders
© ABB Group
April 8, 2019 | Slide 6

7. Azipod® propulsion saves up to 15% fuel Fuel savings in 2010 over 100’000 tons
Improved efficiency and reduced fuel consumption
Typically improvement in hydrodynamic efficiency about % compared to shaftline systems
Total fuel savings depend on ship type, power plant configuration and operational profile
Total estimated savings of Azipod fleet in 2010 were in the range of 100’000 – 150’000 tons of fuel oil
Better cavitation characteristics
Improved comfort due to reduced propeller vibrations and noise levels
The picture shows clearly that therer is not any obstacles or disturbances for the water flow to the Azipod propellers
© ABB Group
April 8, 2019 | Slide 7

8. Azipod, Designed for improved safety
Comparison between cruise vessel Elation (with Azipod) and her sister Vessel (with shaftline)
The graph shows how the vessel heading is changing from full speed with full power after the steering angle has turned to 35 degrees on Azipod vessel and to 40 degrees on sister vessel with rudders.
Distance between the lines is 100m.
© ABB Group
April 8, 2019 | Slide 8

9. Azipod, Designed for improved safety
Generally crash stop distance is about 60 – 70 % of the distance for equal size shaft line vessels
Azipod vessel has its steerability over the whole crash stop period
For twin Azipod vessels recommended to make the crash stop by turning the pod units degrees outwards until the speed drops to about 15 knots. Then turn the pods outwards around to 180 degrees (propellers rotating continuously to the same direction)
© ABB Group
April 8, 2019 | Slide 9

10. Excellency in manoeuvrability
”The Azipods allow me to direct the power exactly where I want it, giving me the confidence to manoeuvre within a decimeter of where I want” Captain William Wright, Master of Oasis of the Seas Marine Propulsion and Auxiliary Machinery Dec/Jan 2009/10
© ABB Group
April 8, 2019 | Slide 10

11. Superior operation in ice
Motor overtorque to match ice operation needs
Full torque at low RPM
No need for a nozzle propeller
Suitable for bow first and stern first icebreaking (DAS, Double Acting Ship)
Full torque available also in reverse RPMs
© ABB Group
April 8, 2019 | Slide 11

12. Azipod XO next generation - Main new features and improvements
Easier access to Azipod unit
Designed for extended docking intervals (min. 5 years)
Hydrodynamic Efficiency improved 2-3%
Non drive end hybrid bearing
Interspace seal arrangement
© ABB Group
April 8, 2019 | Slide 12

13. Interspace - Revolutionary Shaft Seal Arrangement
(* ) depending on frame size
Simple, robust and proven technology
Seal change possible inside the Azipod unit *)
Patent pending
Possible leak can be monitored
Bearing seals fully separated from sea water seals
© ABB Group
April 8, 2019 | Slide 13

14. Hybrid Bearing, innovation which combines the advantages of two different types of bearings
Thrust pad change inside Azipod unit without drydocking
Well known and proven
technologies
Designed to be robust with minimum maintenance costs
Non-drive-end radial
roller bearing
Slide thrust bearing
Redundant lubrication
Patent pending
© ABB Group
April 8, 2019 | Slide 14

15. Efficiency development history
New developments
With yearly propulsion fuel oil consumption of tons,
10% equals 1.25 MUSD/year
(assuming bunker cost 500 USD/ton)
Azipod XO development
New profile and geometry
optimisation for Solstice
and Genesis Class
New profile on strut
and fin on last vessels of
Voyager Class
>9%
Added fin
Radiance Class
First cruise liners
Elation, Paradise
First generation Azipod propulsion
7.5% - 9%
Fantasy Class Diesel electric conventional shaftline propulsion system
*) Compared to reference diesel – electric shaft line cruise liner
1997
1999
2001
2003
2005
2007
2009
2011
Designed for fuel saving up to 20%! *)
© ABB Group
April 8, 2019 | Slide 15

16. Azipod® Propulsion System benefits
Improved fuel efficiency and reduced life cycle cost
Reduced emissions
Excellent manoeuvrability
Operational safety
Space savings, more cabin or cargo space
No need for separate rudders, long shaftlines and stern thrusters
Remarkably improved comfort onboard
Possibility to utilize smaller and optimized power plant
© ABB Group
April 8, 2019 | Slide 16

17. Summary of Azipod references, May 2011
Vessel type
Number
Cruise vessels 48
Ice going vessels
Ice breakers, Arctic cargo vessels 27
Ferries 8
Yachts 7
Recearch vessels 5
Offshore support vessels
Other special vessels
Pipe layer, Crane vessel, Heavy lift, Patrol vessel, WTI 6
Drilling rigs 2
Azipod XO
Azipod XC (CRP)
Azipod CO
Total delivered or on order:
233 Azipod® units
108 vessels
Total Propulsion Power: MW
Installation at more than 30 different shipyards
About operating hours
© ABB Group
April 8, 2019 | Slide 17

18. World First Double Acting Tankers Azipod enables to operate without ice-breaker assistance
Double Acting Tankers Mastera and Tempera
Owner: Neste Oil Finland
Yard: Sumitomo Heavy Industries, Japan
Single 16 MW Azipod propulsion
Ice Class 1A Super
Azipod allows for independent operation in heavy ice conditions
© ABB Group
April 8, 2019 | Slide 18

19. World’s First Vessels with counter-rotating Azipod
Two fast ferries Akashia and Hamanasu
Two Newbuildings
Owner: Shin Nihonkai Ferry Company
Shipyard: Mitsubishi Heavy Industries, Japan
ABB deliveries: /
Azipod allows for tons of fuel savings per year
Azipod allows for speed of up to knots
© ABB Group
April 8, 2019 | Slide 19

20. World’s Biggest Cruise Vessels rely on Azipod
Picture from STX Europe
Cruise Vessels Oasis of the Seas and Allure of the Seas
Owner: Royal Caribbean International
Yard: STX Europe, Finland
Each vessel has three 20 MW Azipod units, generators, switchboards and propulsion drives
Azipod allows for tons of fuel savings per year
Azipod allows to build such big cruise vessels
© ABB Group
April 8, 2019 | Slide 20

21. New concept: Rudderpod™ CRP
Main engine (ME)
Rudderpod strut fixed to ship hull M
Electric motor
Rudder
Potential for higher hydrodynamic efficiency
Continuous propeller hubs
Fixed position of both propellers
Ordinary rudder steering gear
© ABB Group
April 8, 2019 | Slide 21

22. © ABB Group
April 8, 2019 | Slide 22