PROGRAM INFORMATION

SEIBERT - 8/29/2006 through 5/30/2008

DATA DETAILS

August 29, 2006 through July 2, 2007:

The anemometer tower was installed on August 29, 2006. The site is located 12 miles south-southwest of the town of Seibert and 2 miles west of State Highway 59. The tower is located in a rural area predominately used for agriculture. The region’s land form consists of gently rolling terrain associated with the plains east of the Rocky Mountains. The site should have good exposure to the wind due to its rural location and relatively flat terrain.

All data was collected using an NRG #40 Anemometer and NRG #200P Wind Vane mounted on a tilt-up tower located on the landowner's property at a height of 20m. This equipment fed into an NRG Wind Explorer data logger. Five data plugs were sent into the Governor's Energy Office and then to the University of North Dakota for analysis. The data plug files and text versions of these files 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.

For this data, UND applied an offset of +24° to the wind vane data. This corrected data and wind resource summary report for the period from August 29, 2006 through March 1, 2007 are available here:

• UND_Seibert_2006_0829_to_2007_0702.txt
• Seibert_Wind_Resource_Summary_Report_2006_0829_to_2007_0301.pdf

July 2, 2007 through May 30, 2008:

CSU was chosen as the contractor for the program on September 14, 2007. Data collected since September 14, 2007 is given below:

Again, it is important to note that these are the raw files without any compensation for offset or temperature.

From both the UND and CSU data, an analysis of the wind resource report was developed using Windographer 1.13. For this data, an offset of +24° was applied to the wind vane data. For this report, a data quality analysis similar to the UND analysis was performed for the data from for the period from August 29, 2006 through December 22, 2007. 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 six hours was deleted

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

• Seibert_Wind_Resource_Summary_Report_2006_0829_to_2007_1222.pdf
• Seibert_2006_0829_to_2007_1222_without_data_quality.windog
• Seibert_2006_0829_to_2007_1222_without_data_quality.txt
• Seibert_2006_0829_to_2007_1222_with_data_quality.windog
• Seibert_2006_0829_to_2007_1222_with_data_quality.txt

Based on measurments taken at the site on May 30, 2008, it was determined that the actual offset should be +38°. Another analysis was prefromed as described and included all data during the measurement period from August 29, 2006 through May 30, 2008. A data quality analysis was performed as described above. The final wind resource summary files from this analysis are given below:

• Seibert_0749_2006_0829_to_2008_0530_without_data_quality.windog
• Seibert_0749_2006_0829_to_2008_0530_without_data_quality.txt
• Seibert_0749_2006_0829_to_2008_0530_with_data_quality_offset_38.windog
• Seibert_0749_2006_0829_to_2008_0530_with_data_quality_offset_38.txt

Complete Wind Resource Summary

The anemometer tower was removed from the site on May 30, 2008. Highlights of the wind resource at this site for the entire data collection period using the Windographer for the data adjusted for data quality and offset by +38° 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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