PROGRAM INFORMATION

WAVERLY - 1/7/2012 to 7/20/2013

 CSU ALP Install Team: Jacqueline Hess, Ben Ebersole, Scott Little, Michael Lichtbach, Mark Goudreault, Christian Knapp, and Mike Kostrzewa.

DATA DETAILS

July 21, 2011 to December 19, 2011:

The anemometer tower was originally installed on July 21, 2011. The site is located in a pasture about 0.4 miles WSW of the intersection of West County Road 74 and North County Road 15 in Larimer County, about 3 miles north of the Waverly School. The wind is expected to be significant from the W and NW at the site.

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

This equipment fed into an NRG Wind Explorer data logger. All data plugs are sent to the Colorado ALP at Colorado State University for analysis.

Tower Reinstalled: January 6, 2012 - July 20, 2013:

The tower was lowered on 12/19/2011 to replace sensors (see Analyst's Notes below). The tower was reinstalled on 1/6/2011 and the sensors were wired to the data logger on 1/7/2011. The tower was removed on July 20, 2013. Data was collected using three (3) NRG #40C Calibrated Anemometers and one (1) NRG #200P Wind Vane, and one (1) NRG 110S Temperature sensor as follows:

• Anemometers
  1. 30 m (98 feet) on an NRG 60" standard boom bearing 353°
  2. 30 m (98 feet) on an NRG 60" standard boom bearing 263°
  3. 20 m (66 feet) on an NRG 60" standard boom bearing 316°
• Wind Vane
  1. 30 m (98 feet) on an NRG 60" standard boom bearing 316° with the null point facing away from the tower
• Temperature Sensor
  1. 1.8 m (6 feet) on an NRG 6" boom

All sensors fed into three NRG Wind Explorer data loggers. The certifications for the anemometers are as follows:

The wind vane was wired into Wind Explorer S/N 0662 and the temperature logger is wired into Wind Explorer S/N 1378.

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.

Note also that there is a gap in the temperature data from 1/7/12 through 2/13/12. The sensor was inadvertently attached to the wind vane terminals of the data logger rather than the terminals for the temperature. This was discovered when we pulled the first data plug. The senor was correctly rewired to the logger on 2/15/12 and then the plugs were pulled on 2/17/12 to confirm that the installation was correct.

From the collected data, an analysis of the wind resource report was developed for entire data collection period using Windographer 3.1.3. Since the data set contains data for two or more wind speed sensors at different heights above the ground, Windographer considered the wind shear relationship between different wind speed sensors to extrapolate the data to different heights. A best fit using the power law profile was chosen to extrapolate the data.

Using this data, an analysis of the wind resource report was developed. An offset of +322° was applied to the wind vane data. For this analysis, the data was flagged for icing in two ways:

1. Any wind speed data (from any anemometer) where the wind speed was less than 0.4 m/s at a temperature less than 0°C for 2 hours or more was flagged and ignored when calculating the wind resource statistics.
2. Any wind direction data where the wind direction varied by less than 3 degrees at a temperature less than 0°C for 3 hours or more was flagged and ignored.

In addition, the 30m west anemometer was removed from the wind resource assessment because it contributed to an overestimation of the wind resource (See Analyst's Note's below). The summary report, the combined data files, and the Windographer files (with and without the data quality analysis and with and without the 30m west anemometer data) are given below:

• Waverly_4000_2012_0107_to_2013_0720_Summary_Report_no_30W.pdf
• Waverly_4000_2012_0107_to_2013_0720_without_data_validation.windog
• Waverly_4000_2012_0107_to_2013_0720_without_data_validation.txt
• Waverly_4000_2012_0107_to_2013_0720_with_data_validation_flagged_wo_30mW_offset_322.windog
• Waverly_4000_2012_0107_to_2013_0720_with_data_validation_flagged_wo_30mW_offset_322.txt

Final Wind Resource Summary

Highlights of the final wind resource assessment for the data collected during the entire data collection campaign are shown below:

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