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Development

The TidalStream Triton concept has evolved through several stages of development, including testing of:

  • a twin rotor 1/20th scale model in a UK tow test facility
  • a six rotor 1/23rd scale model of the Triton T6 at  Ifremer Deep Water Basin in Brest
  • a 1/10th scale model of the Triton T3, three rotor version in a tidal stretch of the Thames
  • a 1/10th T3 model in the Haslar marine test facility in Gosport.
  • Scale testing of the seabed location and deployment system at Plymouth Ocean Energy basin and in the Fall Estuary

Testing demonstrated:

  • the stability of operation in extreme and fault conditions
  • that that power production is unaffected by the proximity of multiple rotors aligned to the flow
  • the ballast controlled mode changes which are a key feature in practical deployment, maintenance access and end-of-life removal of the Triton platform system.
  • the subsea connection methodology which has  been undertake as part of a TSB supported programme in conjunction with Mojo Maritime

Triton T6 Testing

T6 testing was undertaken in 2009 at a deep water tow tank facility run by Ifremer in Brest, France, with support from the METRI programme. A 1-23rd scale model of the platform with six 0.9m diameter power-generating turbines was towed under a variety of flow, wave and fault cases to thoroughly test and monitor its performance

 

The platform was shown to be stable in both operating and maintenance modes under a range of conditions, and in particular to tolerate fault and extreme wave conditions.  It was shown that Triton could operate stably with one or more rotors ’failed’, using ballast adjustment to maintain a level position.

 

Tidal test results

Testing of the Triton T6 six rotor platform was based on a model of the full scale design which was undertaken by Ramboll UK. 

Ramboll have also conducted work on a gravity base design and deployment system suitable for the conditions expected in typical high flow, scoured bottom, tidal sites.

Tidal current energy testing
Tidal currrent energy testing - maintenance

Triton T3 Testing

T3 testing was undertaken in 2010 and 2011 at a tidal site in the Thames and at the Haslar marine test facility.

 

Three 2m diameter rotors were mounted on the 1/10th scale model of the T3 to demonstrate its performance and provide data for validation of analytical models.

 

On-board control equipment enabled remote ballast changes for the transition between the floating maintenance position and submerged operational position.

Submerged run  capture Run maintenance 1

 Testing in the Haslar facility

T3 deployed

 Operational position

T3 Maintenance

Maintenance position

Tú transition

 Transition to operating position

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TRITON Tidal Energy Platform Technolog y