Analysis of a single point tensioned mooring system for station keeping of a contra-rotating marine current turbine

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Abstract

The Energy Systems Research Unit within the Department of Mechanical Engineering at the University of Strathclyde has developed a novel contra-rotating tidal turbine (CoRMaT). Novel aspects of this turbine include two contra-rotating sets of rotor blades directly driving an open-to-sea permanent magnet generator. The balancing of reactive forces by the use of contra-rotation enables the use of a single point compliant mooring system for station keeping. A series of tank and sea tests have led to the deployment and demonstration of a small stand-alone next generation tidal turbine.

The stability of a single-point mooring system is examined and power quality from the direct drive generator is evaluated. It is noted that good stability from a single point mooring can be achieved within a real tidal stream; however from sea testing of the turbine off the west coast of Scotland in the Sound of Islay, it is shown that some instabilities in device station keeping may have an effect on the output electrical power quality. Finally, the scaling up of the power take-off and delivery options for a 250kW production prototype are described and assessed. It was concluded that the most promising option was an enlarged version of the system already tested, namely a direct-drive contra-rotating permanent magnet generator.
LanguageEnglish
Pages473-487
Number of pages15
JournalIET Renewable Power Generation
Volume4
Issue number6
DOIs
Publication statusPublished - Nov 2010

Fingerprint

Single point mooring
Ocean currents
Turbines
Power quality
Permanent magnets
Mooring
Takeoff
Mechanical engineering
Turbomachine blades
Coastal zones
Demonstrations
Rotors
Acoustic waves
Testing

Keywords

  • contra-rotating
  • stability
  • tidal
  • turbine

Cite this

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title = "Analysis of a single point tensioned mooring system for station keeping of a contra-rotating marine current turbine",
abstract = "The Energy Systems Research Unit within the Department of Mechanical Engineering at the University of Strathclyde has developed a novel contra-rotating tidal turbine (CoRMaT). Novel aspects of this turbine include two contra-rotating sets of rotor blades directly driving an open-to-sea permanent magnet generator. The balancing of reactive forces by the use of contra-rotation enables the use of a single point compliant mooring system for station keeping. A series of tank and sea tests have led to the deployment and demonstration of a small stand-alone next generation tidal turbine. The stability of a single-point mooring system is examined and power quality from the direct drive generator is evaluated. It is noted that good stability from a single point mooring can be achieved within a real tidal stream; however from sea testing of the turbine off the west coast of Scotland in the Sound of Islay, it is shown that some instabilities in device station keeping may have an effect on the output electrical power quality. Finally, the scaling up of the power take-off and delivery options for a 250kW production prototype are described and assessed. It was concluded that the most promising option was an enlarged version of the system already tested, namely a direct-drive contra-rotating permanent magnet generator.",
keywords = "contra-rotating , stability , tidal , turbine",
author = "Joseph Clarke and Gary Connor and Andrew Grant and Cameron Johnstone and {Ordonez Sanchez}, {Stephanie Eugenia}",
year = "2010",
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language = "English",
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pages = "473--487",
journal = "IET Renewable Power Generation",
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T1 - Analysis of a single point tensioned mooring system for station keeping of a contra-rotating marine current turbine

AU - Clarke, Joseph

AU - Connor, Gary

AU - Grant, Andrew

AU - Johnstone, Cameron

AU - Ordonez Sanchez, Stephanie Eugenia

PY - 2010/11

Y1 - 2010/11

N2 - The Energy Systems Research Unit within the Department of Mechanical Engineering at the University of Strathclyde has developed a novel contra-rotating tidal turbine (CoRMaT). Novel aspects of this turbine include two contra-rotating sets of rotor blades directly driving an open-to-sea permanent magnet generator. The balancing of reactive forces by the use of contra-rotation enables the use of a single point compliant mooring system for station keeping. A series of tank and sea tests have led to the deployment and demonstration of a small stand-alone next generation tidal turbine. The stability of a single-point mooring system is examined and power quality from the direct drive generator is evaluated. It is noted that good stability from a single point mooring can be achieved within a real tidal stream; however from sea testing of the turbine off the west coast of Scotland in the Sound of Islay, it is shown that some instabilities in device station keeping may have an effect on the output electrical power quality. Finally, the scaling up of the power take-off and delivery options for a 250kW production prototype are described and assessed. It was concluded that the most promising option was an enlarged version of the system already tested, namely a direct-drive contra-rotating permanent magnet generator.

AB - The Energy Systems Research Unit within the Department of Mechanical Engineering at the University of Strathclyde has developed a novel contra-rotating tidal turbine (CoRMaT). Novel aspects of this turbine include two contra-rotating sets of rotor blades directly driving an open-to-sea permanent magnet generator. The balancing of reactive forces by the use of contra-rotation enables the use of a single point compliant mooring system for station keeping. A series of tank and sea tests have led to the deployment and demonstration of a small stand-alone next generation tidal turbine. The stability of a single-point mooring system is examined and power quality from the direct drive generator is evaluated. It is noted that good stability from a single point mooring can be achieved within a real tidal stream; however from sea testing of the turbine off the west coast of Scotland in the Sound of Islay, it is shown that some instabilities in device station keeping may have an effect on the output electrical power quality. Finally, the scaling up of the power take-off and delivery options for a 250kW production prototype are described and assessed. It was concluded that the most promising option was an enlarged version of the system already tested, namely a direct-drive contra-rotating permanent magnet generator.

KW - contra-rotating

KW - stability

KW - tidal

KW - turbine

U2 - 10.1049/iet-rpg.2009.0209

DO - 10.1049/iet-rpg.2009.0209

M3 - Article

VL - 4

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EP - 487

JO - IET Renewable Power Generation

T2 - IET Renewable Power Generation

JF - IET Renewable Power Generation

SN - 1752-1416

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ER -