PROGRAM INFORMATION

DELTA - 06/27/2006 through 11/11/2007

DATA DETAILS

June 27, 2006 through November 11, 2007:

The anemometer tower was installed on June 27, 2006 by utility personnel from Tri-State Generation & Transmission and Delta-Montrose Electric Association. The site was located on top of a mesa northwest of Delta. 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. Six data plugs were sent into the Governor's Energy Office and then to the University of North Dakota for analysis. However, none of the data plugs were processed by UND. The final data plug was collected when the tower was removed on November 11, 2007. The data plug files and text versions of the all data plug 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.

CSU was chosen as the contractor for the program on September 14, 2007. From all data collected during the monitoring period, an analysis of the wind resource report was developed using Windographer 1.13. For this data, an offset of +202 degrees was applied to the wind vane data. The summary report, the combined data file (without any data quality analysis), and the Windographer files are given below:

• Delta_Wind_Resource_Summary_Report_2006_0627_to_2007_1111.pdf
• Delta_2006_0627_to_2007_1111_without_data_quality.txt
• Delta_2006_0627_to_2007_1111_without_data_quality.windog

Wind Resource Summary

Highlights of the wind resource at this site for the preiod from June 27, 2006 through November 11, 2007 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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