PROGRAM INFORMATION

BRECKENRIDGE - 1/22/2009 to 2/4/2010

 CSU ALP Install Team (from left): Tyler Mork, Justin Nelson, Daniel Fink, Todd MacDonald, Jake Renquist, Andrew Lyle, Brian Smith, Nikki Dunlap, Doug Hopper, and Mike Kostrzewa.

DATA DETAILS

January 22, 2009 to February 4, 2010:

The anemometer tower was installed on January 22, 2009. The site is located just south of the Colorado Mountain College campus (a portion of the Block 11 parcel), which is within the Town of Breckenridge limits. The site sits in North Barton Gulch, a valley east of Peak. The winds were expected to be strong from the south down valley to Lake Dillon to the north. In addition, winds were expected to be strong from the west as the winter winds come over the Tenmile Range.

All data is collected using an NRG #40 Calibrated Anemometer and NRG #200 Wind Vane mounted on a tilt-up tower located on the landowner's property at a height of 30m. The certification for the anemometer is as follows:

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 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.

Using this data, an analysis of the wind resource report was developed using Windographer 1.45. For this data an offset of +70° was applied to the wind vane data. For this report, a 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 6 hours was deleted

Note: During an inspection of the site on June 8, 2009, it was discovered that the wind vane was wired incorrectly to the data logger. As such, the wind direction data should be disregarded prior to this date.

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

• Breckenridge_3906_2009_0122_to_2010_0204_without_data_validation.windog
• Breckenridge_3906_2009_0122_to_2010_0204_without_data_validation.txt
• Breckenridge_3906_2009_0122_to_2010_0204_with_data_validation_offset_70.windog
• Breckenridge_3906_2009_0122_to_2010_0204_with_data_validation_offset_70.txt

Final Wind Resource Summary

The anemometer tower was removed from the site on February 4, 2010. Highlights of the wind resource at this site for the entire monitoring period are shown below:

	Note: During an inspection of the site on June 8, 2009, it was discovered that the wind vane was wired incorrectly to the data logger. As such, the wind direction data should be disregarded prior to this date. The wind rose above contains only wind direction data since June 8, 2009

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 18%. 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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