PROGRAM INFORMATION

NORWOOD - 10/16/2010 to 5/30/2013

 CSU ALP Install Team (from left): Eric Rasbach, Laura Imbler, Kevin Gosselin, Mike Kostrzewa, Daniel Fink, Jacqueline Hess and Jan Harris (taking picture).

DATA DETAILS

October 16, 2010 to May 30, 2013:

The anemometer tower was installed on October 16, 2010 and removed on May 30, 2013. The site was located near the top of Big Baldy, on the saddle just south of the peak and about 400 feet from the high voltage transmission lines that run through the area. This site was located on a open ridge, with some scrub oak and small pines below.

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 20m. The certification for the anemometer is as follows:

Note: An NRG #110S temperature sensor with a radiation shield was installed at a height of 2 m.

This equipment feeds into an NRG Wind Explorer data logger. All data plugs are 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 that the temperature sensor stopped functioning properly on April 5, 2012 until it was reconnected by a crew from Harness Energy on June 3, 2012. The data from this period was deleted so as to not impact the wind resource calculations. The sensor failed periodically until it was replaced at about 18:10 on 10/12/2012.

Using this data, an analysis of the wind resource report was developed using Windographer 3.1.3. For this data an offset of +326° was applied to the wind vane data. This data was flagged for icing in two ways:

1. Any wind speed data where the wind speed was less than 0.5 m/s at a temperature less than 0°C for 2 hours or more was flagged and not included in the wind resource analysis calculations
2. Any wind direction data where the wind direction varied by less than 3 degrees at a temperature less than 0°C for 2 hours or more was flagged and not included in the wind resource analysis calculations

A summary report, the combined data files (with and without the validation analysis), and the Windographer files (with and without the validation analysis) are given below:

• Norwood_3788_2010_1016_to_2013_0530_Summary_Report
• Norwood_3788_2010_1016_to_2013_0530_without_data_validation.windog
• Norwood_3788_2010_1016_to_2013_0530_without_data_validation.txt
• Norwood_3788_2010_1016_to_2013_0530_with_data_validation_flagged_offset_326.windog
• Norwood_3788_2010_1016_to_2013_0530_with_data_validation_flagged_offset_326.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:

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. 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.

Keep in mind too that listing a particular turbine doesn't imply an endorsement - not does it imply that installing a particular turbine model is feasible or recommended for a particular site. For consistency, the larger turbines are included even at sites that where they may not be practical so that one can compare the relative production of different sites.

IMPORTANT: No turbine losses are included in the power, energy, and capacity factor values in the table. Typically, turbine losses can be 5-20% to account for maintenance downtime, icing/soiling and losses from other turbines in a wind farm. Users wanting to be conservative in the performance projections should multiply the power, energy, and capacity values by (1- % losses) to account for these losses.

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