Resource Summary for Fort Collins Site Final Report Colorado Anemometer Loan Program Monitoring Period: /0/00 11/03/007 Report Date: January 1, 00 Site Description: The site is located adjacent to the Highland Meadows Golf Course about miles south west of the town of sor, Colorado. The tower was placed in a hay field about one and a half miles east of Interstate 5. The tower is located in a sheltered area downhill from a ridge on the east. Note: direction data appears to be suspect since the wind vane indicates that the wind was from the NNW direction during the entire data collection time period. LOCATION DETAILS Latitude: N 7? Longitude: W 57? Township: N Range: W Section: Elevation (ft.): 3, Tower Type: NRG Tilt-Up Tower Height (ft.): Tower Height (m): 0 Vane Offset (deg): 337 Direction Basis: Mag. North Mag. Declination: 9.7 E Report Prepared By: Michael Kostrzewa, P.E. and Amanda Borin Colorado State University Department of Mech. Eng. Campus Delivery 137 Fort Collins, CO 053-137 (970) 91-7709 michael@engr.colostate.edu Tower Site
Resource Summary All analysis performed using ographer 1.13 Data Properties Data Set Starts: //00 13: Data Set Ends: 11/3/007 :00 Data Set Duration: 13.1 months Length of Time Step: minutes Elevation (ft.): 3, Calm threshold (mph): 0 Power Coefficients Power Density at 50m: 9 W/m Power Class: 1 (poor) Power Coefficients Power Law Exponent: 0.1 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 1.09 kg/m 3 throughout the period Height above ground (m) 0 Mean wind speed (mph) 7. Median wind speed (mph).1 Min wind speed (mph) 0 Max wind speed (mph). Mean power density (W/m²) Mean energy content (kwh/m²/yr) 5 Energy pattern factor 3. W eibull k 1.315 Weibull c (mph) 7.9 1-hr autocorrelation coefficient 0.77 Diurnal pattern strength 0.9 Hour of peak wind speed 1 Mean turbulence intensity 0. Standard deviation (mph) 5.3 Coefficient of variation (%) 77.5 Frequency of calms (%) 0.5 Actual observations 57,19 Missing observations 0 Data completeness (%) 0 Annual Resource Statistics Speed and Direction Hour of Day speed mph Power Density W/m² Hour of Day speed mph Power Density W/m² 0.5.35 1. 1.5.5.5 1.5.35 1.7 13.5 9.0 9.5.5 5.9 0.5 1.5 9..5 3.5 5.7 3. 15.5 9.51 9.3.5 5.5 3. 1.5 9.7 115.7 5.5 5.50 35.1 17.5 9...5 5.37 3. 1.5 9.0.1 7.5 5.31.7 19.5.9 3.5.5 5.37 3.5 0.5.35 77.1 9.5 5.7 39.1 1.5 7. 9.3.5.1.5.5 7.9 1. 11.5 7.37 3.1 3.5.77 51. Direction Sector Midpoint degrees Direction Sector Midpoint degrees Frequency percent Frequency percent 0 0.0 10 0 0 1 0 0 0 00 0.00 30 0 0 0 0 0 0 50 0 30 0.01 0 0 0 0 70 0 50 0.11 0 0 0 0 0 70 0. 0 0 0 0 1 0.00.17 10 0 300 0 130 0 3 0 10 0 30 30.95 150 0 330 0 10 0 30 5. 170 0 350 0
Power Density Monthly During Measurement Period 10 Power Density (W/m²) 0 30 0 Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov 00 007 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
Speed Monthly During Measurement Period 9 WS0 (mph) 7 5 Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov 00 007 Daily Speed Profile Total For Measurement Period Daily Speed Profile Speed (mph) 0 0 1 1 Hour of Day
Hourly Speed By Month 1 Jan 1 1 Feb 1 1 Mar 1 0 1 1 0 1 1 0 1 1 1 Apr 1 1 May 1 1 Jun 1 0 1 1 0 1 1 0 1 1 1 Jul 1 1 Aug 1 1 Sep 1 0 1 1 0 1 1 0 1 1 1 Oct 1 1 Nov 1 1 Dec 1 0 1 1 0 1 1 0 1 1
0 0 Shear Profile Log law fit Power law fit Measured data Height Above Ground (m) 0 0 0 0 0 Av erage Speed (mph) Frequency Rose (0m) 3 3 30 % % 1 0 1 % 1 1
Direction By Month (All Years) Jan 3 1 15 1 7 30 33 % 5% % Feb 3 1 15 1 7 30 33 % 5% % Mar 3 1 15 1 7 30 33 % 5% % Apr 3 1 15 1 7 30 33 % 5% % May 3 1 15 1 7 30 33 % 5% % Jun 3 1 15 1 7 30 33 % 5% % Jul 3 1 15 1 7 30 33 % 5% % Aug 3 1 15 1 7 30 33 % 5% % Sep 3 1 15 1 7 30 33 % 5% % Oct 3 1 15 1 7 30 33 3% calm % 5% % Nov 3 1 15 1 7 30 33 % 5% % Dec 3 1 15 1 7 30 33 % 5% %
Box Plot for Speed By Month 50 Monthly Statistics for WS0 max daily high mean daily low min 0 30 Value (mph) 0 0 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann Box Plot for Direction By Month 00 350 Monthly Statistics for WD0 max daily high mean daily low min 300 Value ( ) 50 00 150 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 0m 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 Estimated 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 kwh/yr Net Capacity Factor % Bergey Excel- R/10V $1,50.7 7.5 0 7.7 5.1 1.1 0.51,9. Bergey Excel- S/0 $0,.7 0 7.7 3. 0. 0.57 5,017 5.7 Bergey XL.1 $,50.5 1 0 7.7 0.9 1. 0.0 71.1 Southwest Skystream 3.7 Southwest Whisper 500 $,999 3.7 1. 0 7.7 5.5 0.0 0.1 1,35. $,0.5 3 0 7.7 5.1 1. 0.7,31 9.0 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 315 Canyon Dr. Amarillo, TX 791 1.00.39.33 http://www.earthsolar.com/