Wind Resource Summary for Elizabeth Site Final Report Colorado Anemometer Loan Program Monitoring Period: 7/3/6 /15/7 Report Date: December 22, 7 Site Description: The site is.6 miles northeast of the town of Elizabeth, Colorado. The tower is located on elevated ground; however, the terrain in the area is fairly flat. The tower is situated in a pasture where the primary vegetation is grass. The site has good exposure to the wind in all directions. LOCATION DETAILS Latitude: N 39 2' 9" Longitude: W 4 31' " Township: 7 S Range: 64 W Section: 2 Elevation (ft.): 6,3 Tower Type: Com tower mounted Tower Height (ft.): 9 Tower Height (m): 3 Vane Offset (deg): 27 Direction Basis: Mag. North Mag. Declination: 9.133 E Report Prepared By: Michael Kostrzewa, P.E. and Amanda Borin Colorado State University Department of Mech. Eng. Campus Delivery 1374 Fort Collins, CO 523-1374 (97) 491-779 michael@engr.colostate.edu Tower Site Report Date: /22/7
Wind Resource Summary All analysis performed using Windographer 1.13 Data Properties Data Set Starts: 7/3/6 : Data Set Ends: /15/7 15:3 Data Set Duration: 15.4 months Length of Time Step: minutes Elevation (ft.): 6,3 Calm threshold (mph): Wind Power Coefficients Power Density at 5m: 313 W/m 2 Wind Power Class: 3 (Fair) Wind Power Coefficients Power Law Exponent:. Surface Roughness:.1 m Roughness Class:.7 Roughness Description: Rough Pasture Note: Air temperature was not factored into wind calculations Wind Resource Statistics Wind Speed Variable at 3m Height above ground (m) 3 Mean wind speed (mph).5 Median wind speed (mph) 13.7 Min wind speed (mph) Max wind speed (mph) 56.3 Mean power density (W/m²) 253 Mean energy content (kwh/m²/yr) 2,2 Energy pattern factor 1.34 W eibull k 2.94 W eibull c (mph).37 1-hr autocorrelation coefficient.799 Diurnal pattern strength.9 Hour of peak wind speed 23 Mean turbulence intensity.136 Standard deviation (mph) 7.27 Coefficient of variation (%) 5.1 Frequency of calms (%).21 Actual observations 67,543 Missing observations 6 Data completeness (%) 99.9 Hour of Day Average Wind speed mph.5.271 1.5.35 2.5 15.519 3.5 15.136 4.5.96 5.5.52 6.5 13.977 7.5 13.117.5.35 9.5 11.99.5 11.45 11.5.21.5.26 13.5.6.5 13.59 15.5.42.5 15. 17.5 15.45.5 15.74 19.5 15.4.5 15.9 21.5.319 22.5.399 23.5.5 Direction Sector Midpoint degrees Frequency percent.7665 9.72 3 4 5 9.294 6 7.46 9 7.6499 1 5.7 1 13 5.2544 15 5.79 17 5.2263 19 3.2365 2 2 23 3.9 24 25 4.766 26 27 4.11 2 29 4.7 3 3 3 4.23 33 34 5.422 35
4 Wind Power Density 35 Wind Power Density (W/m²) 3 25 15 Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct 6 7 Seasonal Wind Speed Profile Average Wind Speed (mph) 15 5 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
For reference, the table below provides a summary of the wind power classifications from the U.S. DOE s Colorado Wind Resource Map available at: http://www.eere.energy.gov/windandhydro/windpoweringamerica/maps_template.asp?stateab=co Wind Shear Profile Log law fit Power law fit Measured data Height Above Ground (m) 6 4 5 15 Av erage Wind Speed (mph)
Daily Wind Speed Profile Total For Measurement Period Daily Wind Speed Profile Average Wind Speed (mph) 15 5 6 24 Hour of Day Wind Direction For Total Measurement Period Wind Frequency Rose (3m) 34 % calm 3 4 3 6 2 26 4% 24 % 1 2 %
22 Jan Hourly Wind Speed By Month 22 Feb 22 Mar 6 24 6 24 6 24 22 Apr 22 May 22 Jun 6 24 6 24 6 24 22 Jul 22 Aug 22 Sep 6 24 6 24 6 24 22 Oct 22 Nov 22 Dec 6 24 6 24 6 24
33 Wind Direction By Month (All Years) Note: Monthly wind rose graphs do not have the same scale. Jan 1% calm 3 33 Feb 1% calm 3 33 Mar % calm 3 3 6 3 6 3 6 27 9 27 9 27 9 4% 24 % 1 24 % 1 24 % 1 2 33 Apr 1 15 % calm 3 2 33 1 15 May % calm 3 2 33 Jun % 15 % calm 3 3 6 3 6 3 6 27 9 27 9 27 9 4% 6.67% 24 % 1 24 % 1 24 13.3% 1 2 33 Jul 1 15 % calm 3 2 33 Aug % 15 % calm 3 2 33 Sep % 15 % calm 3 3 6 3 6 3 6 27 9 27 9 27 9 24 % 1 24 % 1 24 % 1 2 33 Oct 1 15 % calm 3 2 33 Nov 1 15 % calm 3 2 33 Dec 1 15 % calm 3 3 6 3 6 3 6 27 9 27 9 27 9 24 % 1 24 % 1 24 % 1 2 1 15 2 1 15 2 1 15
Box Plot for Wind Speed By Month 6 5 Monthly Statistics for WS3 max daily high mean daily low min 4 Value (mph) 3 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann Box Plot for Wind Direction By Month 36 33 3 Monthly Statistics for WD3 max daily high mean daily low min 27 24 2 Value ( ) 15 1 9 6 3 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Estimated Wind Turbine Performance The wind resource data from this site was compared against typical small wind turbines at 3m tower height to project the total energy production potential. The table below lists the turbines considered, the estimated turbine costs and the expected turbine performance: Turbine Es timated Turbine Cost (w/o tower) Rotor Diameter meters Rotor Power kw Hub Height meters Hub Height Wind Speed mph Time At Zero Output percent Time At Rated Output percent Average Net Power Output kw Average Net Energy Output kw Average Net Capacity Factor kw Bergey Excel- R/1V $,56 6.7 7.5 3.5 15.91 5.26 1.96 17,13 26.1 Bergey Excel- S/6 $,6 6.7 3.5 6.7 2.4 2.1,392 21 Bergey XL.1 $2,65 2.5 1 3.5 1. 7.29.292 2,55 29.2 Southwest Skystream 3.7 Southwest Whisper 5 $,999 3.7 1. 3.5 13.6.517 4,531 2.7 $6,62 4.5 3 3.5 15. 6.22.929,136 31 Note that the costs do not include the costs for the tower or labor for installation. These turbines are not recommended or endorsed. Landowners interested in installing a turbine are encouraged to contact a wind equipment dealer or a wind developer for design assistance and equipment recommendations. The costs shown above were obtained from publicly available costs on the Internet. For reference, the costs for these turbines were obtained from the following vendor: Earth Solar Group 6315 Canyon Dr. Amarillo, TX 791 1..329.323 http://www.earthsolar.com/