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June 1, 2009

4.3 – Wind Speed Analysis

Filed under: — admin @ 3:35 pm

4.3 Windspeed

The average windspeed by year is an indicator of wind power potential and the average windspeed by month is a better indicator (Fig 4.11). However the average value does not take into account the cubic relation for wind power. For the data period data, the average windspeed of the monthly values at 40 m are 7.3 to 8.1 m/s for the High Plains, around 6 m/s for the Mid Plains and Rio Grande Valley, and upper 5 m/s for the Coastal region (Table 4.2). The highest average windspeed is 8.6 m/s for Guadalupe Pass and the lowest was 4.3 m/s for Hueco Mountains.

Values of gusts are useful information for wind turbine operation. Typical gusts by month range from 20 to 25 m/s and were seldom over 20 m/s for coastal sites. Peak gusts (1 second duration) ranged from 34 to 61 m/s.

There was a severe wind storm, which damaged several units at the wind farm at the Delaware Mountains during January 1996. Peak windspeed recorded at the Guadalupe Pass was 61.6 m/s.The eye of Hurricane Bret passed about midway between Corpus Christi and Raymondville. The peak windspeeds recorded were 33.6 m/s at Corpus Christi, 34.4 m/s at Raymondville, 24.4 m/s at Rio Grande City, and 29.9 m/s at Mirando City.

Figure 4.11. Average monthly windspeed, 95-99, for Mirando City.

Table 4.2. Month Mean Windspeed, m/s, At 40 m, Peak Gust, And Month Occurred.

Average m/s Peak m/s Month Occured
High Plains:�
Amarillo
7.3 34 5/95, 6/97, 4/99, 7/99
Dalhart�
7.6 50 6/99
Quay Co
7.7 46 8/96
White Deer
8.1 34 2/99
Mid Plains:�
Bluegrove
6.4 37 7/97
Denver City
6.4 44 5/97
Maryneal
6.8 37 5/95
Coastal:�
Alice
5.8 37 9/97
LaPaloma
5.1 45 5/96
Matagorda
5.8 54 3/99
Ryamondville
5.5 41 6/97
Rio Grande Valley:
Carta Valley
6.3 40 4/98
Mirando City
6.4 56 12/97
Rio Grande City
6.4 34 5/99
Trans Pecos:
Guadalupe Pass
8.6 61 1/96
Hueco Mountains
4.3 40 1/96

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