PROGRAM INFORMATION

DURANGO/HESPERUS

11/19/2007 through 04/17/2008

DATA DETAILS

November 19, 2007 through April 17, 2008:

The anemometer tower was installed on November 19, 2007 in an open pasture on the grounds of Colorado State University Extension Service's San Juan Basin Research Center near Hesperus. However, the lessee was the Coordinator for the Environmental Center at Fort Lewis College in Durango.

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 to the Colorado ALP at Colorado State University for analysis. All of the data plug files and text versions of these files.

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 using Windographer 1.21. An offset of +17 degrees was applied to the wind vane data. A data quality analysis was performed for the data for the period from November 19, 2007 through April 17, 2008. This data was filtered two ways:

1. Any wind speed data where the wind speed was less than 1 mph for 3 hours or more was deleted.
2. Any wind direction data where the wind direction varied by less than 3 degrees over 6 hours was deleted

Windographer was then used to add in synthetic data to these intervals with suspect data. The data files (with and without the data quality analysis), and the Windographer files (with and without the data quality analysis) are given below:

• Durango_3708_2007_1119_to_2008_0417.windog
• Durango_3708_2007_1119_to_2008_0417_raw_data.txt
• Durango_3708_2007_1119_to_2008_0417_data_quality_17_offset.windog
• Durango_3708_2007_1119_to_2008_0417_data_quality_17_offset.txt

Final Wind Resource Summary

The anemometer tower was removed from the site on April 17, 2009. Highlights of the wind resource at this site for the entire monitoring period are shown below:

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.

November 19, 2007 through March 30, 2008

Highlights of the wind resource at this site from Movember 19, 2007 through March 30, 2008 are shown below:

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.

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