Projects per year
Abstract
Maintaining the engineering health of Marine Renewable Energy Devices (MREDs) is one of the main limits to their economic viability, because of the requirement for costly marine interventions in challenging conditions. Acoustic Emission (AE) condition monitoring is routinely and successfully used for land-based devices, and this paper shows how it can be used underwater. We review the acoustic signatures expected from operation and likely failure modes of MREDs, providing a basis for a generic classification system. This is illustrated with a Wave Energy Converter tested at Falmouth Bay (UK), monitored for 2 years. Underwater noise levels have been measured between 10 Hz and 32 kHz throughout this time, covering operational and inactive periods. Broadband MRED contributions to ambient noise are generally negligible. Time-frequency analyses are used to detect acoustic signatures (60 Hz – 5 kHz) of specific operational activities, such as the active Power Take Off, and relate them to engineering and environmental conditions. These first results demonstrate the feasibility of using underwater Acoustic Emissions to monitor the health and performance of MREDs.
Original language | English |
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Pages (from-to) | 205-213 |
Number of pages | 17 |
Journal | Renewable Energy |
Volume | 102 |
Issue number | Part A |
Early online date | 24 Oct 2016 |
DOIs | |
Publication status | Published - Mar 2017 |
Bibliographical note
First author Jodi Walsh is a joint NERC-GW4 PhD student affiliated to both the University of Exeter and the University of Bath. Dual affiliation is presented on the accepted manuscript.Keywords
- Underwater Acoustics
- Acoustic Emission
- Condition monitoring
- Health Monitoring
- Marine Renewable Energy
- Wave Energy Converter
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Acoustics and Ultrasonics
- Ocean Engineering
Fingerprint
Dive into the research topics of 'Monitoring the condition of Marine Renewable Energy Devices through underwater Acoustic Emissions: Case study of a Wave Energy Converter in Falmouth Bay, UK'. Together they form a unique fingerprint.Projects
- 1 Finished
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AEMORE: Acoustic Emission technology for environmental and engineering health Monitoring of Offshore Renewable Energy
Blondel, P. (PI), Thies, P. R. (PI) & Johanning, L. (CoPI)
1/10/14 → 31/03/18
Project: Research council
Profiles
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Philippe Blondel
- Department of Physics - Senior Lecturer
- Institute for Sustainable Energy and the Environment
- Water Innovation and Research Centre (WIRC)
- EPSRC Centre for Doctoral Training in Statistical Applied Mathematics (SAMBa)
- Institute for Mathematical Innovation (IMI)
- Centre for Mathematical Biology
- Centre for Climate Adaptation & Environment Research (CAER)
- Astrophysics
Person: Research & Teaching, Core staff, Affiliate staff