VICTOR/DEADWOOD - 08/15/2007 through 02/27/2008
LOCATION DETAILS |
Latitude: |
N 38° 44.690' |
Longitude: |
W 105° 09.368' |
Township: |
15 S |
Range: |
69 W |
Section: |
18 |
Elevation (ft.): |
10,325 |
Tower Type: |
Weather station |
Tower Height: |
22.9 m (75 ft) |
Vane Offset (deg): |
+278 |
Direction Basis: |
Mag. North |
Mag. Declination: |
9° 14' E, changing by 7' W/yr |
Site Number: |
0001 |
Wind Explorer S/N: |
1479 |
DATA DETAILS
August 15, 2007 through February 27, 2008:
The anemometer tower was installed on August 15, 2007 on the property of the AngloGold Ashanti (Colorado) Corp.'s Cripple Creek & Victor gold mine. The tower is located at a height of about 75 feet on a weather station on a 2:1 slope overlooking the town of Cripple Creek. All data was collected by Anglogold Ashanti personnel using an NRG #40 Anemometer and NRG #200P Wind Vane. This equipment fed into an NRG Wind Explorer data logger. The data plug files were received by CSU for analysis. The data plug files and text versions of these files are given below.
Raw Wind Data Files |
NRG Data Plug Files |
Txt Files |
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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.
From this data, an analysis of the wind resource report was developed for the period from August 15, 2007 through February 27, 2008 using Windographer 1.13. For this data, an offset of +278 degrees was applied to the wind vane data. No data quality analysis was conducted for this data. The combined data file and the Windographer files are given below:
Current Wind Resource Summary
Highlights of the wind resource at this site through the most recent data ending on February 27, 2008 are shown below:
Data Properties |
Variable |
Data Set Starts: |
8/15/2007 9:50 |
Height above ground (m) |
22.9 |
Data Set Ends: |
2/27/2008 8:50 |
Mean wind speed (mph) |
13.19 |
Data Set Duration: |
5.5 months |
Median wind speed (mph) |
12.50 |
Length of Time Step: |
10 minutes |
Min wind speed (mph) |
0.80 |
Elevation (ft.): |
10,325 |
Max wind speed (mph) |
41.6 |
Calm threshold (mph): |
0 |
Mean power density (W/m²) |
173 |
Wind Power Coefficients |
Mean energy content (kWh/m²/yr) |
1,516 |
Power Density at 50m: |
244 W/m² |
Energy pattern factor |
1.886 |
Wind Power Class: |
2 (Marginal) |
Weibull k |
1.985 |
Wind Shear Coefficients |
Weibull c (mph) |
14.84
|
Power Law Exponent: |
0.14 |
1-hr autocorrelation coefficient |
0.818 |
Surface Roughness: |
0.01 m |
Diurnal pattern strength |
0.074 |
Roughness Class: |
0.780 |
Hour of peak wind speed |
14 |
Roughness Description: |
Rough Pasture |
Mean turbulence intensity |
0.208 |
Note: The wind power density and wind power class at 50m are projections of the data from 22.9 m. 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) |
6.85 |
Coefficient of variation (%) |
51.9 |
Frequency of calms (%) |
0 |
Actual observations |
28,212 |
Missing observations |
6 |
Data completeness (%) |
100 |
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 |
20 |
13.01 |
21.4 |
3.1 |
1.43 |
12,510 |
19.0 |
Bergey Excel-S |
6.7 |
10 |
20 |
13.01 |
10.7 |
1.1 |
1.51 |
13,252 |
15.1 |
Bergey XL.1 |
2.5 |
1 |
20 |
13.01 |
4.5 |
4.0 |
0.21 |
1,872 |
21.4 |
Southwest Skystream 3.7 |
3.7 |
1.8 |
20 |
13.01 |
18.1 |
0 |
0.38 |
3,321 |
21.1 |
Southwest Whisper 500 |
4.5 |
3 |
20 |
13.01 |
21.4 |
3.5 |
0.70 |
6,155 |
23.4 |
Northern Power NW 100/20 |
20 |
100 |
25 |
13.43 |
28.4 |
0 |
13.0 |
113,506 |
13.0 |
Vestas V47 - 660 kW |
47 |
660 |
65 |
15.35 |
15.9 |
0.2 |
142 |
1,247,577 |
21.6 |
GE 1.5s |
70.5 |
1,500 |
80.5 |
15.81 |
20.1 |
3.9 |
291 |
2,549,898 |
19.4 |
Vestas V80 - 2.0 MW |
80 |
2,000 |
100 |
16.3 |
19.2 |
1.6 |
482 |
4,222,634 |
24.1 |
GE 2.5xl |
100 |
2,500 |
110 |
16.52 |
14.1 |
5.0 |
680 |
5,961,171 |
27.2 |
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/Other_Victor_Sites/Deadwood/Deadwood_Wind_Shear_Profile_300.png)
/Other_Victor_Sites/Deadwood/Deadwood_Wind_Rose_300.png)
/Other_Victor_Sites/Deadwood/Deadwood_Seasonal_Wind_Speed_Profile_300.png)
/Other_Victor_Sites/Deadwood/Deadwood_Daily_Wind_Speed_Profile_300.png)