PROGRAM INFORMATION

MT. PRINCETON - 2/22/2007 through 5/19/2008

DATA DETAILS

February 22, 2007 through June 20, 2007:

The anemometer tower was installed on February 22, 2007. 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 20m. This equipment fed into an NRG Wind Explorer data logger. Only one data plug was sent into the Governor's Energy Office and then to the University of North Dakota for analysis. The first data plug file for the period from February 22, 2007 through April 3, 2007 could not be found. The data plug files and text versions of the second 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.

June 20, 2007 through May 19, 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 was developed using Windographer 1.13. For this data, an offset of +110° was applied to the wind vane data. A data validation analysis was performed on the wind speed and direction 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 4 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:

• Mount_Princeton_0665_2007_0403_to_2008_0519_without_data_validation.windog
• Mount_Princeton_0665_2007_0403_to_2008_0519_without_data_validation.txt
• Mount_Princeton_0665_2007_0403_to_2008_0519_with_data_validation_gaps_offset_110.windog
• Mount_Princeton_0665_2007_0403_to_2008_0519_with_data_validation_gaps_offset_110.txt

Complete Wind Resource Summary

The anemometer tower was removed from the site on May 19, 2008. Highlights of the wind resource at this site for the entire data collection period using the Windographer for the data adjusted for data validation and offset by +110° 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.

For more information Contact Us!