Counter-rotating turbine in unique power unit provided for bidirectional tidal streams

Toshiaki Kanemoto, Nakjoong Lee, Man Woong Heo, Bin Huang, Yuji Nakanishi, Yuki Funami

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The energy from a tidal stream is abundant and renewable resource whose power is predictable and sustainable. To generate power effectively from the stream a unique counter rotating type tidal stream power unit, whose tandem rotors drive inner and outer armatures in a generator, has been provided by the authors. At the tidal power station located in narrow straits, the unit needs to be reoriented so that useful output power can be obtained from both flood and ebbing tides. In this paper, the counter rotating tandem rotor turbine was designed for operation in a bidirectional tidal stream and the performance was analyzed. The maximum output power is somewhat lower than that of the rotors designed exclusively for a unidirectional stream. The relative flow has a positive angle of attack at the leading edge and discharges from the trailing edge along the blade camber. The angular momentum change, namely the rotor work, is seen to always be accompanied with a shock loss at the leading edge.

Original languageEnglish
Title of host publicationProceedings of the 12th ISOPE Pacific-Asia Offshore Mechanics Symposium, PACOMS 2016
EditorsJin S. Chung
PublisherInternational Society of Offshore and Polar Engineers
Pages254-258
Number of pages5
ISBN (Electronic)9781880653982
Publication statusPublished - 2016 Jan 1
Externally publishedYes
Event12th ISOPE Pacific-Asia Offshore Mechanics Symposium, PACOMS 2016 - Gold Coast, Australia
Duration: 2016 Oct 42016 Oct 7

Other

Other12th ISOPE Pacific-Asia Offshore Mechanics Symposium, PACOMS 2016
CountryAustralia
CityGold Coast
Period16/10/416/10/7

Fingerprint

turbine
Turbines
Rotors
Tidal power
Cambers
Angular momentum
Tides
Angle of attack
renewable resource
angular momentum
strait
tide
energy

Keywords

  • Bidirectional
  • Counter-rotating
  • Performance
  • Tandem turbine
  • Tidal stream

ASJC Scopus subject areas

  • Ocean Engineering
  • Geotechnical Engineering and Engineering Geology
  • Mechanical Engineering

Cite this

Kanemoto, T., Lee, N., Heo, M. W., Huang, B., Nakanishi, Y., & Funami, Y. (2016). Counter-rotating turbine in unique power unit provided for bidirectional tidal streams. In J. S. Chung (Ed.), Proceedings of the 12th ISOPE Pacific-Asia Offshore Mechanics Symposium, PACOMS 2016 (pp. 254-258). International Society of Offshore and Polar Engineers.

Counter-rotating turbine in unique power unit provided for bidirectional tidal streams. / Kanemoto, Toshiaki; Lee, Nakjoong; Heo, Man Woong; Huang, Bin; Nakanishi, Yuji; Funami, Yuki.

Proceedings of the 12th ISOPE Pacific-Asia Offshore Mechanics Symposium, PACOMS 2016. ed. / Jin S. Chung. International Society of Offshore and Polar Engineers, 2016. p. 254-258.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kanemoto, T, Lee, N, Heo, MW, Huang, B, Nakanishi, Y & Funami, Y 2016, Counter-rotating turbine in unique power unit provided for bidirectional tidal streams. in JS Chung (ed.), Proceedings of the 12th ISOPE Pacific-Asia Offshore Mechanics Symposium, PACOMS 2016. International Society of Offshore and Polar Engineers, pp. 254-258, 12th ISOPE Pacific-Asia Offshore Mechanics Symposium, PACOMS 2016, Gold Coast, Australia, 16/10/4.
Kanemoto T, Lee N, Heo MW, Huang B, Nakanishi Y, Funami Y. Counter-rotating turbine in unique power unit provided for bidirectional tidal streams. In Chung JS, editor, Proceedings of the 12th ISOPE Pacific-Asia Offshore Mechanics Symposium, PACOMS 2016. International Society of Offshore and Polar Engineers. 2016. p. 254-258
Kanemoto, Toshiaki ; Lee, Nakjoong ; Heo, Man Woong ; Huang, Bin ; Nakanishi, Yuji ; Funami, Yuki. / Counter-rotating turbine in unique power unit provided for bidirectional tidal streams. Proceedings of the 12th ISOPE Pacific-Asia Offshore Mechanics Symposium, PACOMS 2016. editor / Jin S. Chung. International Society of Offshore and Polar Engineers, 2016. pp. 254-258
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