Numeric-modeling sensitivity analysis of the performance of wind turbine arrays
An evaluation of the numerical model created by Lissaman for predicting the performance of wind turbine arrays has been made. Model predictions of the wake parameters have been compared with both full-scale and wind tunnel measurements. Only limited, full-scale data were available, while wind tunnel studies showed difficulties in representing real meteorological conditions. Nevertheless, several modifications and additions have been made to the model using both theoretical and empirical techniques and the new model shows good correlation with experiment. The larger wake growth rate and shorter near wake length predicted by the new model lead to reduced interference effects on downstream turbines and hence greater array efficiencies. The array model has also been re-examined and now incorporates the ability to show the effects of real meteorological conditions such as variations in wind speed and unsteady winds. The resulting computer code has been run to show the sensitivity of array performance to meteorological, machine, and array parameters. Ambient turbulence and windwise spacing are shown to dominate, while hub height ratio is seen to be relatively unimportant. Finally, a detailed analysis of the Goodnoe Hills wind farm in Washington has been made to show how power output can be expected to vary with ambient turbulence, wind speed, and wind direction.
- Research Organization:
- Pacific Northwest Lab., Richland, WA (USA); AeroVironment, Inc., Pasadena, CA (USA)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 5281004
- Report Number(s):
- PNL-4183; ON: DE82017570
- Country of Publication:
- United States
- Language:
- English
Similar Records
Calculation of wake power losses in a two-level array: a simple case study
An examination of wake effects and power production for a group of large wind turbines
Detailed analysis of the wake and free-flow characteristics at the Goodnoe Hills MOD-2 site
Technical Report
·
Sat Nov 30 23:00:00 EST 1985
·
OSTI ID:6311639
An examination of wake effects and power production for a group of large wind turbines
Technical Report
·
Thu Mar 31 23:00:00 EST 1988
·
OSTI ID:5158081
Detailed analysis of the wake and free-flow characteristics at the Goodnoe Hills MOD-2 site
Conference
·
Fri Sep 01 00:00:00 EDT 1989
·
OSTI ID:5432280