These comments come from the recent Field Test Instrumentation and Measurement Topical Expert Meeting and were submitted by Sandia National Labs.
On October 7 and 8, the International Energy Agency (IEA) Wind Topical Expert Meeting (TEM) on Field Test Instrumentation and Measurement Best Practices was held at Texas Tech University. The event, hosted by the DOE Wind Power Program, Texas Tech University (TTU) and Sandia National Laboratories, included 18 U.S. and European field test experts from government agencies, national laboratories and academia. The objectives of the TEM were to:
- discuss the strengths and limitations of existing field measurement technology,
- examine state-of-the-art instrumentation,
- establish best practices and lessons learned from previous campaigns to inform future experimental campaigns,
- ascertain best practices for using scaled and controlled testing or both to complement utility-scale testing and
- develop requirements for comprehensive future field campaigns that will improve model prediction accuracy of the fluid physics throughout wind farms.
Sandia researchers, Tommy Herges and Jon White, contributed presentations on an overview of the Wake Imaging System and the capabilities of the SWiFT facility. Additional presentation topics included LIDAR and TTU RADAR flow-field measurements and DLR’s (the German Aerospace Center) development of a new wind farm testing facility in Germany. For measurements on the wind farm scale, long-range pulsed LIDAR and TTU’s RADAR were found to have potentially complementary capabilities. Finer spatial resolution field measurement technologies included continuous-wave LIDAR, met tower sonic anemometers, and the Sandia Wake Imaging System. Continuous-wave LIDAR is an established technology capable of point measurements while the Sandia Wake Imaging System aims to capture instantaneous 2D images needed to measure the coherent turbulent structures in the wake near the rotor.
Alternatively, DLR plans to use a fractal array of sonic anemometers on met towers for their high-resolution velocity measurements of wind turbine wakes. More detail on the meeting can be found through the contact below, and the IEA plans to provide the presentations on its website.
Tommy Herges, (505) 284-9760.
|Attendees at the IEA Wind Topical Experts Meeting at Texas Tech University.|
Sandia National Laboratories