Noise emissions from two tidal turbines; an experimental field campaign

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

Abstract

The first tidal turbine arrays have now been
installed as the world strives to reach net zero carbon targets
by 2050. Underwater noise emissions from single tidal
turbine devices have caused some environmental concern in
the past and therefore determining levels of noise emitted
from these structures has become a crucial component of the
consenting process. Ecological concerns include auditory
masking for local fauna, presenting potential migration
barriers and affecting predation. While some progress has
been made in characterising noise emissions from
individual tidal turbines in realistic field conditions, little
is known about the noise field created by multiple turbines.
This paper presents a first analysis of the variation of noise
emissions of an array of two test turbines, deployed from a
moored floating platform in the Strangford Narrows,
Northern Ireland. Data was acquired using a drifting
hydrophone for zero, one and two turbines operating under
different control settings. Data analyses were complicated
by the limited amount of data. Stopping the turbines
completely does not necessarily result in minimum noise
emissions, potentially due to flow separation from the
stationary blades, turbulence and induced structural
vibrations.
Original languageEnglish
Title of host publicationThe European Wave and Tidal Energy Conference 2021 (EWTEC 2021): Proceedings
Number of pages4
Publication statusAccepted - 15 Jun 2021
EventEuropean Wave and Tidal Energy Conference: European Wave and Tidal Energy Conference - University of Plymouth, Drake Circus, Plymouth, Devon, United Kingdom, PL4 8AA, Plymouth, United Kingdom
Duration: 05 Sep 202109 Sep 2021
Conference number: 14
https://ewtec.org/ewtec-2021/

Publication series

NameThe European Wave and Tidal Energy Conference (EWTEC): Proceedings
ISSN (Print)2706-6940
ISSN (Electronic)2706-6932

Conference

ConferenceEuropean Wave and Tidal Energy Conference
Abbreviated titleEWTEC2021
CountryUnited Kingdom
CityPlymouth
Period05/09/202109/09/2021
Internet address

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