Height extrapolation of short- and long-term averaged wind data
Conference
·
OSTI ID:6176146
Various models that are used for height extrapolation of short and long-term averaged wind speeds are discussed. Hourly averaged data from 3 tall meteorological towers (the NOAA Erie Tower in Colorado, the Battelle Goodnoe Hills Tower in Washington, and the WKY-TV Tower in Oklahoma), together with data from 17 candidate sites (selected for possible installation of large WECS) were used to analyze the variability of short-term average wind shear with atmospheric and surface parameters, and the variability of the long-term Weibull distribution parameter with height. The exponents of a power law model, fit to the wind speed profiles at the three meteorological towers, showed the same variability with anemometer level wind speed, stability, and surface roughness as the similarity law model. Of the four models representing short-term wind data extrapolation with height (1/7 power law, logarithmic law, power law, and modified power law), the modified power law gives the minimum rms for all candidate sites for short-term average wind speeds and the mean cube of the speed. The modified power law model was also able to predict the upper-level scale factor for the WKY-TV and Goodnoe Hill Tower data with higher accuracy. All models were not successful in extrapolation of the Weibull shape factors.
- Research Organization:
- Solar Energy Research Inst., Golden, CO (USA)
- DOE Contract Number:
- AC02-77CH00178
- OSTI ID:
- 6176146
- Report Number(s):
- SERI/TP-211-1978; CONF-830622-14; ON: DE83011963
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
17 WIND ENERGY
170604* -- Wind Energy Engineering-- Site Characteristics
ANEMOMETERS
COLORADO
DIMENSIONS
EXTRAPOLATION
FEDERAL REGION VI
FEDERAL REGION VIII
FEDERAL REGION X
HEIGHT
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
NORTH AMERICA
NUMERICAL SOLUTION
OKLAHOMA
ROUGHNESS
SURFACE PROPERTIES
TESTING
USA
VALIDATION
VELOCITY
WASHINGTON
WIND
170604* -- Wind Energy Engineering-- Site Characteristics
ANEMOMETERS
COLORADO
DIMENSIONS
EXTRAPOLATION
FEDERAL REGION VI
FEDERAL REGION VIII
FEDERAL REGION X
HEIGHT
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
NORTH AMERICA
NUMERICAL SOLUTION
OKLAHOMA
ROUGHNESS
SURFACE PROPERTIES
TESTING
USA
VALIDATION
VELOCITY
WASHINGTON
WIND