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Viryd Technologies' CS8 Turbine Testing and Results

Viryd Technologies CS8 wind turbine. Text Version

As part of the National Renewable Energy Laboratory and U.S. Department of Energy (NREL/DOE) Independent Testing project, NREL is testing Viryd Technologies' CS8 small wind turbine at the National Wind Technology Center (NWTC). The CS8 is an upwind, horizontal-axis, three-bladed, stall controlled turbine rated at 8 kilowatts (kW). It has an 8.5-meter rotor diameter and is mounted on a guyed tilt-up lattice tower with a hub height of 24.9 meters. The CS8 uses a single-phase, grid-connected, induction generator that operates at 240 volts AC.

Testing Summary

Supporting data and explanations for data provided in this table will be provided in the final reports once testing is complete. Data presented are preliminary and subject to revision.



Cumulative Energy Production

10/21/2011: 75; 11/15/2011: 197; 11/18/2011: 258; 12/5/2011: 525; 12/19/2011: 632; 1/3/2012: 752; 2/6/2012: 868; 2/24/2012: 956; 2/27/2012: 988; 3/2/2012: 1083; 3/21/2012: 1572; 4/2/2012: 1676; 4/16/2012: 1795; 5/4/2012: 2092; 8/1/2012: 2944; 8/13/2012: 3073; 11/5/2012: 3625; 11/8/2012: 3690; 12/3/2012: 3833;
Activity Status
Award of Grant December 1, 2009
Preparation for Installation Foundation installed: August 17, 2010
Components received: September 7, 2011
Documentation received: August 26, 2011
Turbine Installation September 22, 2011
Turbine Commissioning Viryd commissioning: October 6, 2011
Readiness verification: November 22, 2011
Data Acquisition System check: October 12, 2011
Turbine O&M and Testing  
Safety and Function Test In progress
Power Performance Test Data collection complete; Report in progress
Hrs of valid data (60 required)
 740
Bins completed (3.5-14 m/s required)
 0.5-19
Acoustic Noise Test In progress
Power Quality Test Not Applicable
Duration Test In progress
Months of operation (6 required)
 12; Testing ongoing
Hours of power production (2,500 required)
 1,629.1; Testing ongoing
Hours of power production in winds greater than 10.2 m/s (250 required)
 371.4; Testing ongoing
Hours of power production in winds greater than 15.3 m/s (25 required)
 72; Testing ongoing
kWh of production, cumulative
 1,795
Turbine Removed Not applicable
Post-test Inspection Not started
Final Documentation Not started
Project Review Meeting Not started