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TELLURIDE - 04/19/2006 through 06/13/2007

LOCATION DETAILS
Latitude:
N 38° 01’ 11”
Longitude:
W 107° 59’ 44”
Township:
44 N
Range:
10 W
Section:
32
Elevation (ft.):
8,900
Tower Type:
NRG Tilt-Up
Tower Height:
30 m (98.4 ft)
Vane Offset (deg):
+0°
Direction Basis:
Unknown
Mag. Declination:
10° 47' E, changing by 7' W/yr
Site Number:
0663
Wind Explorer S/N:
0663


DATA DETAILS

April 19, 2006 through June 13, 2006:

The anemometer tower was installed on April 19, 2006. The site was approximately 12 miles northwest of the town of Telluride. The site was situated on Hastings Mesa. The Mesa is bounded by the San Miguel River on its south side. The vegetation around the site is primarily grass and brush.

All data was collected using an NRG #40 Anemometer and NRG #200 Wind Vane mounted on a tilt-up tower located on the landowner's property at a height of 30m. This equipment fed into an NRG Wind Explorer data logger. All data plugs were sent into the Governor's Energy Office and then to the University of North Dakota for analysis. All data plug files and text versions of these files are given below.

Raw Wind Data Files
NRG Data_Plug Files
Txt Files
Telluride_0663_2006_1019_1201.A06 Telluride_0663_2006_1019_1201.txt
Telluride_0663_2006_1201_0117.A06 Telluride_0663_2006_1201_0117.txt
Telluride_0663_2007_0117_0305.A07 Telluride_0663_2007_0117_0305.txt
Telluride_0663_2007_0305_0404.A07 Telluride_0663_2007_0305_0404.txt
Telluride_0663_2007_0404_0513.A07 Telluride_0663_2007_0404_0513.txt
Telluride_0663_2007_0404_0513.A07 Telluride_0663_2007_0404_0513.txt

It is important to note that these are the raw files without any compensation for offset. It is also important to note that the temperature was not recorded during this period.

For this data, UND applied an offset of +0° to the wind vane data. This corrected data and wind resource summary report are available here:

From both the UND data, an analysis of the wind resource report was developed using Windographer 1.13. For this data, an offset of +0° was applied to the wind vane data. You can find the Windographer file below:

Wind Resource Summary

Highlights of the wind resource at this site for the entire data collection period are shown below:

Data Properties
Variable
Data Set Starts:
4/19/2006 0:00
Height above ground (m)
30
Data Set Ends:
6/14/2007 0:00
Mean wind speed (mph)
9.69
Data Set Duration:
13.8 months
Median wind speed (mph)
9.32
Length of Time Step:
10 minutes
Min wind speed (mph)
0
Elevation (ft.):
8,900
Max wind speed (mph)
51.77
Calm threshold (mph):
0
Mean power density (W/m²)
87
Wind Power Coefficients
Mean energy content (kWh/m²/yr)
765
Power Density at 50m:
108 W/m²
Energy pattern factor
2.294
Wind Power Class:
1 (Poor)
Weibull k
1.707
Wind Shear Coefficients
Weibull c (mph)

10.83
Power Law Exponent:
0.14
1-hr autocorrelation coefficient
0.748
Surface Roughness:
0.01 m
Diurnal pattern strength
0.048
Roughness Class:
0.780
Hour of peak wind speed
12
Roughness Description:
Rough Pasture
Mean turbulence intensity
0.226
Note: The wind power density and wind power class at 50m are projections of the data from 30m. A surface roughness of 0.01 meters was assumed for this projection. This is equal to that of a rough pasture. This value was then used this to calculate the roughness class and the power law exponent shown above.
Standard deviation (mph)
5.76
Coefficient of variation (%)
59.4
Frequency of calms (%)
2.44
Actual observations
60,458
Missing observations
166
Data completeness (%)
99.7

 

Windographer was used to match up the wind at this site with the performance curves of some common turbines of various sizes and various heights, allowing for losses of about 13%. The table below shows the results. For the larger turbines, the tower height was increased to account for the larger turbine blades - the wind resource was extrapolated to these higher heights. Keep in mind that the larger and the higher the turbine, the better the wind and the greater the output. But of course, as the tower heights and turbine sizes increase so does the cost.

Turbine
Rotor
Diameter
meters
Rotor
Power
kW
Hub
Height
meters
Hub
Height
Wind
Speed
mph
Time
At
Zero
Output
percent
Time
At
Rated
Output
percent
Average
Net
Power
Output
kW
Average
Net
Energy
Output
kWh/yr
Average
Net
Capacity
Factor
%
Bergey Excel-R
6.7
7.5
30
9.69
34.0
1.4
0.69
6,042
9.2
Bergey Excel-S
6.7
10
30
9.69
19.5
0.7
0.78
6,835
7.8
Bergey XL.1
2.5
1
30
9.69
9.7
1.9
0.11
958
10.9
Southwest Skystream 3.7
3.7
1.8
30
9.69
29.2
0
0.21
1,817
11.5
Southwest Whisper 500
4.5
3
30
9.69
34.0
1.6
0.38
3,308
12.6
Northern Power NW 100/20
20
100
30
9.69
46.4
0
5.55
48,613
5.5
Vestas V47 - 660 kW
47
660
65
10.8
28.2
0.1
60.4
528,901
9.1
GE 1.5s
70.5
1,500
80.5
11.13
34.8
1.4
114
1,002,622
7.6
Vestas V80 - 2.0 MW
80
2,000
100
11.47
33.6
0.6
213
1,870,238
10.7
GE 2.5xl
100
2,500
110
11.63
26.3
1.7
303
2,655,627
12.1

 

 

 

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