In-Situ Blade Strain Measurements of a Crossflow Turbine Operating in a Tidal Flow
This data was collected between October 25 and December 12 of 2022 at the University of New Hampshire (UNH) and Atlantic Marine Energy Center (AMEC) turbine deployment platform (TDP). The goal was to collect blade strain data from a crossflow turbine operating in a tidal flow. A table in ('Deployment Schedule.PNG') outlines the various dates when each instrument was operational, and more details can be found via literature listed in 'Related Publications'.txt.
This dataset includes zipped folders for each instrument containing data in .csv files for the relevant duration specific to each instrument, along with separate README file for each measurement. Some instrument files are quite large and can pose a challenge for a visual spreadsheet editor to open. A processing software like MATLAB or Python is recommended. All data contained in this submission is unfiltered/unprocessed data unless otherwise noted in the README file.
Blade strain was measured using 8 foil-based strain gauges along the span of a single turbine blade. Water currents were measured using Acoustic Doppler Current Profilers (ADCP's) and Acoustic Doppler Velocimeters (ADV's) both upstream and downstream of the turbine for inflow, wake and turbulence measurements. Electrical power output was measured using the Voltsys rectifier. Shaft speed was calculated based on the Voltsys measurements of the permanent magnet three phase generator AC generation frequency, coupled directly to the cross flow turbine under test (i.e., no gear box). Platform motions were captured using a Yost IMU (inertial measurement unit). Turbine thrust loading was measured using a reaction arm about the turbine deployment platform spanning beam, where two bi-directional load cells were connected to the system via a pinned connection.
The TDP is a floating structure moored on the Portsmouth facing side of Memorial Bridge pier #2, which spans the Piscataqua River between Portsmouth, NH and Kittery, ME. The Piscataqua River connects the Great Bay Estuary to the Gulf of Maine and the river currents are dominated by tidal flow with water velocities exceeding 2.5 m/s during spring ebb tides at this site which were previously characterized by Chancey 2019.
The turbine under test was a modified New Energy Corporation (Calgary, CA) model EVG-025 4-blade H-Darrius type vertical axis cross flow turbine that rotates in the clockwise direction with a rotor diameter of 3.2m and blade length of 1.7m. The hydro-foil profile was a NACA 0021 with a 10 inch chord length and a blade preset pitch angle of +4deg with a positive angle corresponding with the toe in direction. The standard EVG-025 has a rotor diameter of 3.4m and its rated power output is 25kW at 3 m/s. The rotor diameter was reduced to accommodate the size of the existing TDP moon-pool. A single blade of this turbine was further modified to accommodate 8 full-bridge strain gauges (Bharath et al 2023, Bichanich et al 2024). For power performance and other relevant details on the turbine and its characteristics, see O'Byrne 2022.
Citation Formats
TY - DATA
AB - This data was collected between October 25 and December 12 of 2022 at the University of New Hampshire (UNH) and Atlantic Marine Energy Center (AMEC) turbine deployment platform (TDP). The goal was to collect blade strain data from a crossflow turbine operating in a tidal flow. A table in ('Deployment Schedule.PNG') outlines the various dates when each instrument was operational, and more details can be found via literature listed in 'Related Publications'.txt.
This dataset includes zipped folders for each instrument containing data in .csv files for the relevant duration specific to each instrument, along with separate README file for each measurement. Some instrument files are quite large and can pose a challenge for a visual spreadsheet editor to open. A processing software like MATLAB or Python is recommended. All data contained in this submission is unfiltered/unprocessed data unless otherwise noted in the README file.
Blade strain was measured using 8 foil-based strain gauges along the span of a single turbine blade. Water currents were measured using Acoustic Doppler Current Profilers (ADCP's) and Acoustic Doppler Velocimeters (ADV's) both upstream and downstream of the turbine for inflow, wake and turbulence measurements. Electrical power output was measured using the Voltsys rectifier. Shaft speed was calculated based on the Voltsys measurements of the permanent magnet three phase generator AC generation frequency, coupled directly to the cross flow turbine under test (i.e., no gear box). Platform motions were captured using a Yost IMU (inertial measurement unit). Turbine thrust loading was measured using a reaction arm about the turbine deployment platform spanning beam, where two bi-directional load cells were connected to the system via a pinned connection.
The TDP is a floating structure moored on the Portsmouth facing side of Memorial Bridge pier #2, which spans the Piscataqua River between Portsmouth, NH and Kittery, ME. The Piscataqua River connects the Great Bay Estuary to the Gulf of Maine and the river currents are dominated by tidal flow with water velocities exceeding 2.5 m/s during spring ebb tides at this site which were previously characterized by Chancey 2019.
The turbine under test was a modified New Energy Corporation (Calgary, CA) model EVG-025 4-blade H-Darrius type vertical axis cross flow turbine that rotates in the clockwise direction with a rotor diameter of 3.2m and blade length of 1.7m. The hydro-foil profile was a NACA 0021 with a 10 inch chord length and a blade preset pitch angle of +4deg with a positive angle corresponding with the toe in direction. The standard EVG-025 has a rotor diameter of 3.4m and its rated power output is 25kW at 3 m/s. The rotor diameter was reduced to accommodate the size of the existing TDP moon-pool. A single blade of this turbine was further modified to accommodate 8 full-bridge strain gauges (Bharath et al 2023, Bichanich et al 2024). For power performance and other relevant details on the turbine and its characteristics, see O'Byrne 2022.
AU - Bharath, Aidan
A2 - Bichanich, Mason
A3 - O'Byrne, Patrick
A4 - Monahan, Michael
A5 - Wosnik, Martin
A6 - Nichols, Casey
A7 - Raye, Robert
A8 - Simms, Andrew
A9 - Candon, Charles
A10 - Ross, Hannah
A11 - Hunt, Jon
A12 - Murphy, Mark
DB - Marine and Hydrokinetic Data Repository
DP - Open EI | National Renewable Energy Laboratory
DO - 10.15473/2481243
KW - MHK
KW - Marine
KW - Hydrokinetic
KW - energy
KW - power
KW - Piscataqua River
KW - tidal turbine
KW - crossflow
KW - strain
KW - field data
KW - New Hampshire
KW - raw data
KW - TDP
KW - turbine deployment platform
KW - Portsmouth
KW - power performance
KW - acoustic doppler current profiler
KW - ADCP
KW - acoustic doppler velocimeter
KW - ADV
KW - Excel
KW - MATLAB
KW - Python
KW - tidal flow
KW - crossflow turbine
KW - processed data
KW - blade strain
KW - thrust
KW - power output
LA - English
DA - 2022/12/16
PY - 2022
PB - National Renewable Energy Laboratory
T1 - In-Situ Blade Strain Measurements of a Crossflow Turbine Operating in a Tidal Flow
UR - https://doi.org/10.15473/2481243
ER -
Bharath, Aidan, et al. In-Situ Blade Strain Measurements of a Crossflow Turbine Operating in a Tidal Flow. National Renewable Energy Laboratory, 16 December, 2022, Marine and Hydrokinetic Data Repository. https://doi.org/10.15473/2481243.
Bharath, A., Bichanich, M., O'Byrne, P., Monahan, M., Wosnik, M., Nichols, C., Raye, R., Simms, A., Candon, C., Ross, H., Hunt, J., & Murphy, M. (2022). In-Situ Blade Strain Measurements of a Crossflow Turbine Operating in a Tidal Flow. [Data set]. Marine and Hydrokinetic Data Repository. National Renewable Energy Laboratory. https://doi.org/10.15473/2481243
Bharath, Aidan, Mason Bichanich, Patrick O'Byrne, Michael Monahan, Martin Wosnik, Casey Nichols, Robert Raye, Andrew Simms, Charles Candon, Hannah Ross, Jon Hunt, and Mark Murphy. In-Situ Blade Strain Measurements of a Crossflow Turbine Operating in a Tidal Flow. National Renewable Energy Laboratory, December, 16, 2022. Distributed by Marine and Hydrokinetic Data Repository. https://doi.org/10.15473/2481243
@misc{MHKDR_Dataset_569,
title = {In-Situ Blade Strain Measurements of a Crossflow Turbine Operating in a Tidal Flow},
author = {Bharath, Aidan and Bichanich, Mason and O'Byrne, Patrick and Monahan, Michael and Wosnik, Martin and Nichols, Casey and Raye, Robert and Simms, Andrew and Candon, Charles and Ross, Hannah and Hunt, Jon and Murphy, Mark},
abstractNote = {This data was collected between October 25 and December 12 of 2022 at the University of New Hampshire (UNH) and Atlantic Marine Energy Center (AMEC) turbine deployment platform (TDP). The goal was to collect blade strain data from a crossflow turbine operating in a tidal flow. A table in ('Deployment Schedule.PNG') outlines the various dates when each instrument was operational, and more details can be found via literature listed in 'Related Publications'.txt.
This dataset includes zipped folders for each instrument containing data in .csv files for the relevant duration specific to each instrument, along with separate README file for each measurement. Some instrument files are quite large and can pose a challenge for a visual spreadsheet editor to open. A processing software like MATLAB or Python is recommended. All data contained in this submission is unfiltered/unprocessed data unless otherwise noted in the README file.
Blade strain was measured using 8 foil-based strain gauges along the span of a single turbine blade. Water currents were measured using Acoustic Doppler Current Profilers (ADCP's) and Acoustic Doppler Velocimeters (ADV's) both upstream and downstream of the turbine for inflow, wake and turbulence measurements. Electrical power output was measured using the Voltsys rectifier. Shaft speed was calculated based on the Voltsys measurements of the permanent magnet three phase generator AC generation frequency, coupled directly to the cross flow turbine under test (i.e., no gear box). Platform motions were captured using a Yost IMU (inertial measurement unit). Turbine thrust loading was measured using a reaction arm about the turbine deployment platform spanning beam, where two bi-directional load cells were connected to the system via a pinned connection.
The TDP is a floating structure moored on the Portsmouth facing side of Memorial Bridge pier #2, which spans the Piscataqua River between Portsmouth, NH and Kittery, ME. The Piscataqua River connects the Great Bay Estuary to the Gulf of Maine and the river currents are dominated by tidal flow with water velocities exceeding 2.5 m/s during spring ebb tides at this site which were previously characterized by Chancey 2019.
The turbine under test was a modified New Energy Corporation (Calgary, CA) model EVG-025 4-blade H-Darrius type vertical axis cross flow turbine that rotates in the clockwise direction with a rotor diameter of 3.2m and blade length of 1.7m. The hydro-foil profile was a NACA 0021 with a 10 inch chord length and a blade preset pitch angle of +4deg with a positive angle corresponding with the toe in direction. The standard EVG-025 has a rotor diameter of 3.4m and its rated power output is 25kW at 3 m/s. The rotor diameter was reduced to accommodate the size of the existing TDP moon-pool. A single blade of this turbine was further modified to accommodate 8 full-bridge strain gauges (Bharath et al 2023, Bichanich et al 2024). For power performance and other relevant details on the turbine and its characteristics, see O'Byrne 2022.},
url = {https://mhkdr.openei.org/submissions/569},
year = {2022},
howpublished = {Marine and Hydrokinetic Data Repository, National Renewable Energy Laboratory, https://doi.org/10.15473/2481243},
note = {Accessed: 2025-04-24},
doi = {10.15473/2481243}
}
https://dx.doi.org/10.15473/2481243
Details
Data from Dec 16, 2022
Last updated Jan 1, 2025
Submitted Oct 2, 2024
Organization
National Renewable Energy Laboratory
Contact
Aidan Bharath
303.384.6907
Authors
Keywords
MHK, Marine, Hydrokinetic, energy, power, Piscataqua River, tidal turbine, crossflow, strain, field data, New Hampshire, raw data, TDP, turbine deployment platform, Portsmouth, power performance, acoustic doppler current profiler, ADCP, acoustic doppler velocimeter, ADV, Excel, MATLAB, Python, tidal flow, crossflow turbine, processed data, blade strain, thrust, power outputDOE Project Details
Project Name Lab and University Collaboration for MHK Instrumentation and Data Processing Tools
Project Lead Lauren Ruedy
Project Number FY23 AOP 2.2.3.404