PROGRAM INFORMATION

SCHRIEVER AFB

10/18/2007 through 10/21/2008

DATA DETAILS

October 18, 2007 through October 21, 2008:

The anemometer tower was installed on October 18, 2007 in an open pasture within the the grounds Schriever AFB. 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. The data plug files and text versions for all files received during the measuring period are given below.

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.

Using this data, an analysis of the wind resource report was developed using Windographer 1.21. For this data an offset of +8° was applied to the wind vane data. For this report, a data validation analysis was performed on the data. 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 5 hours was deleted

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

• Schriever_AFB_1817_2007_1018_to_2008_1021_without_data_validation.windog
• Schriever_AFB_1817_2007_1018_to_2008_1021_without_data_validation.txt
• Schriever_AFB_1817_2007_1018_to_2008_0627_with_data_validation_offset_8.windog
• Schriever_AFB_1817_2007_1018_to_2008_0627_with_data_validation_offset_8_10_minute.txt
• Schriever_AFB_1817_2007_1018_to_2008_0627_with_data_validation_offset_8_15_minute.txt
• Schriever_AFB_1817_2007_1018_to_2008_0627_with_data_validation_offset_8_60_minute.txt

Note that the txt files with data validation also include the projected output in kW in 10, 15, and 60 minute intervals from a Fuhrlander FL 1500 70m on a 70m tower wind turbine using the wind data from this site.

Final Wind Resource Summary

The anemometer tower was removed from the site on October 21, 2008. 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.

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