In-Situ Blade Strain Measurements of a Crossflow Turbine Operating in a Tidal Flow

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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 -
Export Citation to RIS
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

Aidan Bharath

National Renewable Energy Laboratory

Mason Bichanich

University of New Hampshire Atlantic Marine Energy Center AMEC

Patrick O'Byrne

University of New Hampshire Atlantic Marine Energy Center AMEC

Michael Monahan

University of New Hampshire Atlantic Marine Energy Center AMEC

Martin Wosnik

University of New Hampshire Atlantic Marine Energy Center AMEC

Casey Nichols

National Renewable Energy Laboratory

Robert Raye

National Renewable Energy Laboratory

Andrew Simms

National Renewable Energy Laboratory

Charles Candon

National Renewable Energy Laboratory

Hannah Ross

National Renewable Energy Laboratory

Jon Hunt

University of New Hampshire Atlantic Marine Energy Center AMEC

Mark Murphy

National Renewable Energy Laboratory

DOE 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

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