Resource Summary for Elizabeth Site Final Report Colorado Anemometer Loan Program Monitoring Period: 7/3/06 /26/07 Report Date: January, 0 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.): 6,30 Tower Type: Com tower mounted Tower Height (ft.): 9 Tower Height (m): 30 Vane Offset (deg): 270 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 0523-1374 (970) 491-7709 michael@engr.colostate.edu Tower Site
Resource Summary All analysis performed using ographer 1.13 Data Properties Data Set Starts: 7/3/06 0:00 Data Set Ends: /26/07 11:50 Data Set Duration: months Length of Time Step: minutes Elevation (ft.): 6,30 Calm threshold (mph): 0 Power Coefficients Power Density at 50m: 311 W /m 2 W ind Power Clas s: 3 (Fair) Power Coefficients Power Law Exponent: 0. Surface Roughness: 0.01 m Roughness Class: 0.7 Roughness Description: Rough Pasture Note: Air temperature was not measured during the measuring period so air density taken to be 1.013 kg/m 3 throughout the period Speed Variable at 30m Height above ground (m) 30 Mean wind speed (mph).4 Median wind speed (mph) 13.62 Min wind speed (mph) 0 Max wind speed (mph) 5.67 Mean power density (W/m²) 251 Mean energy content (kwh/m²/yr) 2,2 Energy pattern factor 1.32 W eibull k 2.1 Weibull c (mph).35 1-hr autocorrelation coefficient 0. Diurnal pattern strength 0.4 Hour of peak wind speed 23 Mean turbulence intensity 0.135 Standard deviation (mph) 7.24 Coefficient of variation (%) 50 Frequency of calms (%) 0.13 Actual observations 77,90 Missing observations 0 Data completeness (%) 0 Hour of Day Annual Resource Statistics Speed and Direction speed mph Power Density W/m² Hour of Day speed mph Power Density W/m² 0.5.6 306.2.5.375 1. 1.5 15.931 20.6 13.5 13.055 22.0 2.5 15.451 252..5 13.950 257. 3.5 15.057 233.0 15.5.761 293.9 4.5.09 222.4.5.940 24.4 5.5.321 211.1 17.5 15.470 296.5 6.5 13.664 195.9.5 15.522 276.6 7.5.909 2.6 19.5 15.719 291.1.5.459 17.4.5 15.967 3.7 9.5.0 2. 21.5.351 332.5.5 11.902 3.9 22.5.43 329.1 11.5.035 9.1 23.5.1 307.0 Direction Sector Midpoint degrees Direction Sector Midpoint degrees Frequency percent Frequency percent 0 9.47 0 4.37 0.44 190 0.09 9.79 0 3.34 30 0.46 2 0.09 40 0.39 2 0. 50 9.76 230 3.70 60 0.2 240 0.06 70.24 250 3.77 0 0.29 260 0.06 90 7.66 270 3.66 0 0.25 20 0.07 1 6.01 290 3.64 1 0. 300 0.07 130 0.17 3 0.07 0 5.22 3 4.0 150 0.21 330 0. 0 5.32 340 5.99 170 0. 350 0.26
Power Density Monthly During Measurement Period 400 350 Power Density (W/m²) 300 250 0 150 Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 06 07 For reference, the table below provides a summary of the wind power classifications from the U.S. DOE s Colorado Resource Map available at: http://www.eere.energy.gov/windandhydro/windpoweringamerica/maps_template.asp?stateab=co
22 Speed Monthly During Measurement Period WS30 (mph) 3 4 5 6 7 9 11 13 15 17 19 21 22 23 24 25 26 27 2 29 30 31 1 July 06 Daily Speed Profile Total For Measurement Period Daily Speed Profile Speed (mph) 15 5 0 0 6 24 Hour of Day
22 Jan Hourly Speed By Month 22 Feb 22 Mar 0 6 24 0 6 24 0 6 24 22 Apr 22 May 22 Jun 0 6 24 0 6 24 0 6 24 22 Jul 22 Aug 22 Sep 0 6 24 0 6 24 0 6 24 22 Oct 22 Nov 22 Dec 0 6 24 0 6 24 0 6 24
0 0 Shear Profile Log law fit Power law fit Measured data Height Above Ground (m) 60 40 0 0 5 15 Av erage Speed (mph) Frequency Rose (30m) 34 3 4 30 6 2 26 4% 24 % 1 2 %
Direction By Month (All Years) Dec 3 6 9 1 15 2 24 27 30 33 % % Nov 3 6 9 1 15 2 24 27 30 33 % % Oct 3 6 9 1 15 2 24 27 30 33 % % Sep 3 6 9 1 15 2 24 27 30 33 % % Aug 3 6 9 1 15 2 24 27 30 33 % % Jul 3 6 9 1 15 2 24 27 30 33 % % Jun 3 6 9 1 15 2 24 27 30 33 % % May 3 6 9 1 15 2 24 27 30 33 % % Apr 3 6 9 1 15 2 24 27 30 33 % % Mar 3 6 9 1 15 2 24 27 30 33 % % Feb 3 6 9 1 15 2 24 27 30 33 % % Jan 3 6 9 1 15 2 24 27 30 33 % %
Box Plot for Speed By Month 60 50 Monthly Statistics for WS30 max daily high mean daily low min 40 Value (mph) 30 0 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann Box Plot for Direction By Month 360 330 300 Monthly Statistics for WD30 max daily high mean daily low min 270 240 2 Value ( ) 0 150 1 90 60 30 0 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Estimated Turbine Performance The wind resource data from this site was compared against typical small wind turbines at 30m 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 Speed mph Time At Zero Output percent Time At Rated Output percent Net Power Output kw Net Energy Output kw Net Capacity Factor kw Bergey Excel- R/1V $,560 6.7 7.5 30.4.0 5.2 1.95 17,053 26.0 Bergey Excel- S/60 $,6 6.7 30.4 6.7 2.5 2.09,294.9 Bergey XL.1 $2,650 2.5 1 30.4 1. 7.2 0.29 2,545 29.1 Southwest Skystream 3.7 Southwest Whisper 500 $,999 3.7 1. 30.4 13. 0.0 0.52 4,5 2.6 $6,062 4.5 3 30.4.0 6.1 0.93,3 30. 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 1.00.329.323 http://www.earthsolar.com/