bringing sailing back to shipping - norsepowernorsepower rotor sail solution is particularly suited...
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Bringing sailing back to shippingMore information at norsepower.com
Rotor Sail technologyOverview
Configuration
Magnus effect principle
Operation
Installation
Norsepower’s Rotor Sail Solution harnesses wind to maximise ship fuel efficiency. When wind conditions are favourable, the Rotor Sails allow the main propulsion to be throttled back, saving fuel and reducing emis-sions by providing the required thrust to maintain ship speed and voyage time. Rotor Sails can be installed on newbuildings or retrofitted to existing ships. The Norsepower Rotor Sail Solution is particularly suited to vessel types such as tankers, LNG carriers, Ro-Ros, RoPaxes, general cargo ships, bulk carriers, as well as cruise ships and ferries.
Norsepower Rotor Sails are available in five models with heights of 18, 24, 28, 30 or 35 meters.
The essential parts of the Rotor Sail Solution are:
The recommended number and size of Rotor Sails depends on the size, speed, and operating profile of the vessel.
The Rotor Sail technology is based on the Magnus effect. When wind meets the spinning Rotor Sail, the air flow accelerates on one side of the Rotor Sail and decelerates on the opposite side of the Rotor Sail. The change in the speed of air flow results in a pressure difference, which creates a lift force that is perpendicular to the wind flow direction. The lift force pushes the ship forward. The same Magnus effect principle applies to all rotating spheres and cylinders and can also be observed in golf, tennis or football.
The Norsepower Rotor Sail Solution is best suited to vessels where:
An integral part of Norsepower’s Rotor Sail Solution is the NorseControl automation system. The crew has control of the Rotor Sails from the Control Panel on the bridge and can choose the operating mode as desired. In automatic mode the system monitors the wind speed and direction, and automatically selects the correct rotational direction and optimal RPM of the rotors to maximize the fuel savings for the vessel.
The Rotor Sails are mounted on vessel-tailored foundations, which are installed during a yard stay. When the installation of the foundations has been completed, the Rotor Sails can be lifted on the vessel and attached to the foundations during a regular port call.
Lower windspeed = Higher pressure
Higher windspeed = Lower pressure
T H R U S TT H R U S T
L O W E RS U P P O R T
U P P E RS U P P O R T
D R I V E
• The required installation space is available on deck
• The operating profile has a high time-at-sea ratio
• The prevailing wind conditions are favourable
• Norsepower Rotor Sails, which deliver the thrust force
• A control panel, which gives the bridge crew control of the operation and performance of the Norsepower Rotor Sail Solution
• A fully automatic control system, which optimises the forward thrust and fuel saving performance of the Rotor Sails
• A low-voltage electrical power supply to each Rotor Sail
Magnus effect
Typical scope of supply
References
Rotor Sail delivery includes:
• Rotor Sail units assembled, tested and ready for installation
• NorseControl automation system
• Installation supervision and commissioning
• Project management
Norsepower supports the customer with information related to foundation design and manufacturing, cabling, mechanical and electrical installations as well as with selecting the most cost-efficient transportation method.
A tilting foundation is available as an option to allow the Rotor Sail to be lowered to a horizontal position when reduced air draft is required.
Norsepower’s Remote Support Service Agreement includes:
• Spare parts
• Remote monitoring with monthly reports
• Remote expert support for possible troubleshooting and corrective maintenance work
• Training for ship’s crew and technical superintendents during the Rotor Sail installation and commissioning phase.
Until June 2021, thirteen Rotor Sails have been installed on six ships including tanker, bulker, RoRo and passenger vessels. More information at norsepower.com
Five tilting 24 x 4 Rotor Sails, May 2021
One 30 x 5 Rotor Sail, June 2020
Two 30 x 5 Rotor Sails, Aug 2018
Two tilting 35 x 5 Rotor Sails, January 2021
VLOC Sea Zhoushan, Pan Ocean
Hybrid Ferry M/V Copenhagen, Scandlines
LR2 Maersk Pelican,Maersk Tankers
RoRo SC Connector, Sea-CargoVerified savings
The fuel saving performance of the Rotor Sails has been verified during extensive measurement and analysis campaigns by third-party companies. Rotor Sails are proven to perform according to expectations in varying operating conditions.
At Norsepower we work continuously to develop and further improve our system, so we reserve the right to make changes to the information presented in this brochure without notice.
Technical Specifications
Rotor
Ambient conditions
Support structure
Drive
Polar Diagram: 1 x 35x5 Rotor SailRotor Propulsion Power [kW] & True Wind [m/s]STW = 15kn, EFF = 0.7
The polar diagram displays the forward thrust produced by the Rotor Sail in propulsion power equivalent kW’s for different true wind angles and true wind speeds for a ship sailing at 15 knots. In this example, propulsion power equivalent of approximately 3000 kW or more of forward thrust is produced when the true wind speed is more than 22 m/s and the true wind angle is 105-135 or 225-255 degrees from the bow. Correspondingly, more than 1000 kW of propulsion power is produced with 10 m/s and 60-130 or 230-300 degrees from the bow.
Maximum continuous thrust force, [kN] 100 175 205 300 350
Rotor speed [rpm]
Maximum operational wind speed, [m/s]
Survival wind speed, [m/s]
Foundation height (indicative), [m]
Variable speed drive voltage and input frequency, [V/Hz]
Hydraulic tilting mechanism
Weight of typical foundation [tons]
Regenerative braking/Brake resistor
ATEX compliant design
Rotor Sail assembly weight without foundation [tons]
Control system software
Ice prevention
Material
Operational temperature, [C°]
Material
Electric motor nominal power, [kW]
Remote control and monitoring System
0–180
35
70
3
Optional
20
Standard / Optional
Standard / Optional
Standard / Optional
Standard / Optional
Standard / Optional
Optional
59
NorseControl
Optional
0–180
35
70
3
Optional
17
Optional
42
NorseControl
Optional
0–225
35
70
2.5
Optional
15
Optional
38
NorseControl
Optional
0–225
35
70
2.5
Optional
13
Optional
27
NorseControl
Optional
0–250
35
70
Composite
- 30…+50 - 30…+50 - 30…+50 - 30…+50 - 30…+50
Welded steel structure
Welded steel structure
Welded steel structure
Welded steel structure
Welded steel structure
30
Standard
Composite
80
Standard
Composite
100
Standard
Composite
115
Standard
Composite
143
Standard
2
380-690V,50/60 Hz
380-690V,50/60 Hz
380-690V,50/60 Hz
380-690V,50/60 Hz
380-690V,50/60 Hz
Optional
9
Optional
20
NorseControl
Optional
M O D E L 1 8 X 3 2 4 X 4 2 8 X 4 3 0 X 5 3 5 X 5
Contact us: [email protected] 2A, FI-00180, HELSINKI, FINLAND