Triton Field Trials (TFiT) underwater noise - University of New Hampshire Living Bridge turbine Processed Data

Description

In July 2021, a commercial-off-the-shelf hydrophone was deployed in a free-drifting configuration to measure underwater acoustic emissions and characterize a 25 kW-rated tidal turbine at the University of New Hampshire's Living Bridge Project in Portsmouth, New Hampshire. Sampling methods and analysis were performed in alignment with the recently published IEC 62600-40 Technical Specification for acoustic characterization of marine energy converters. Results from this study indicate acoustic emissions from the turbine were below ambient sound levels and therefore did not have a significant impact on the underwater noise levels of the project site. As a component of Pacific Northwest National Laboratory's Triton Field Trials (TFiT) described in a paper published in a Special Issue of Journal of Marine Energy Science and Engineering, this study provides a valuable use case for the IEC 62600-40 Technical Specification framework and further recommendations for cost-effective technologies and methods for measuring underwater noise at future current energy converter project sites. The paper can be accessed in the link bellow.

Resources

Name Format Description Link
21 Journal article detailing the methods used for collection, processing, and analysis of the acoustic emissions data included in this submission. https://www.mdpi.com/2077-1312/10/5/632
57 Raw underwater acoustic emissions data collected on 7/21/2021 via drifting hydrophone. The file names include the hydrophone serial number (1796), the date (yyyymmdd), and time (hhmmss). Hydrophone lab calibration files are included for reference. https://mhkdr.openei.org/files/473/raw_data_072121.zip
57 Raw underwater acoustic emissions data collected on 7/23/2021 via drifting hydrophone https://mhkdr.openei.org/files/473/raw_data_072321.zip
57 Raw underwater acoustic emissions data collected on 7/22/2021 via drifting hydrophone https://mhkdr.openei.org/files/473/raw_data_072221.zip
57 Processed data underwater acoustic emissions data collected via hydrophone. Data are in .mat format. Processed data includes LPF: the mean-squared sound pressure spectral density level in Eq. (2) in the paper, MSPL: the marine energy converter sound pressure levels in the 10Hz to 100 kHz band, and DSPL: decidecade sound pressure level for the different drifts. To process the data, Global Navigation Satellite System (GNSS) position data for the drifting hydrophone buoy were post process kinematic corrected using base station data from the National Oceanic and Atmospheric Administration Continuously Operating Reference Stations Network station ID NHUN on the nearby UNH campus in Durham, New Hampshire. Emlid Studio (Version 1) GNSS data processing software was used to PPK correct the Emlid Reach M2 derived GNSS drifter positions, and flag data quality. More information on data processing is available in the journal article linked below. https://mhkdr.openei.org/files/473/first_order_processed_data.zip
22 Sound pressure levels along 14 drifting tracks. Note the three 25 m x 25 m zones centered roughly 100 m upstream and downstream of the turbine, and the zone centered 25 m to port where the sound metrics were calculated. https://mhkdr.openei.org/files/473/jmse-10-00632-g009-550.jpg

Tags

  • underwater-noise
  • cec
  • drifting-hydrophone
  • processed-data
  • hydrokinetic
  • cross-flow-turbine
  • acoustic-emissions
  • mhk
  • living-bridge-project
  • environmental
  • tfit
  • marine
  • tidal-turbine
  • power
  • marine-energy
  • environmental-monitoring
  • acoustic
  • hydrophone
  • current-energy-converter
  • raw-data
  • energy

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