Load alleviation technology for extending life in tidal turbines

Anna M. Young, Judith R. Farman, Robert J. Miller

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

2 Citations (Scopus)

Abstract

The two main obstacles to the commercial deployment of tidal turbines are cost and reliability. Behind both of these lies the ability of a turbine to withstand the hostile marine environment for long periods without failure or costly maintenance. Unsteadiness in the incoming flow seen by a tidal turbine causes large fluctuations in thrust and torque, which generate fatigue loads on the blade and drivetrain respectively and thus significantly reduce turbine lifespan. This paper will present the development of flow control devices to keep thrust and torque constant despite changes in flow speed. In particular, it will be shown that torque can be controlled using a small trip near the leading edge of the blade, and that thrust can be controlled viaa flap at the trailing edge. Data from a small-scale turbine will be used to show the effectiveness of both devices, and a reduction in unsteady loading of up to 75% will be demonstrated. This could translate into an order of magnitude increase in fatigue life.

Original languageEnglish
Title of host publicationProgress in Renewable Energies Offshore - Proceedings of 2nd International Conference on Renewable Energies Offshore, RENEW 2016
EditorsC. Guedes Soares
PublisherCRC Press
Pages521-530
Number of pages10
Edition1
ISBN (Print)9781138626270
Publication statusPublished - 13 Oct 2016
Event2nd International Conference on Renewable Energies Offshore, RENEW 2016 - Lisbon, Portugal
Duration: 24 Oct 201626 Oct 2016

Conference

Conference2nd International Conference on Renewable Energies Offshore, RENEW 2016
CountryPortugal
CityLisbon
Period24/10/1626/10/16

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Young, A. M., Farman, J. R., & Miller, R. J. (2016). Load alleviation technology for extending life in tidal turbines. In C. Guedes Soares (Ed.), Progress in Renewable Energies Offshore - Proceedings of 2nd International Conference on Renewable Energies Offshore, RENEW 2016 (1 ed., pp. 521-530). CRC Press. https://www.crcpress.com/Progress-in-Renewable-Energies-Offshore-Proceedings-of-the-2nd-International/Soares/p/book/9781138626270