Wind Energy Feasibility Study - Town Of Orleans

Project:Orleans, MA Wind FSDescription:Town of Orleans Wind Turbine Feasibility StudyWindPRO version 2.6.1.252 Jan 2009Printed/Page02/19/2009 3:15 PM / 3Licensed user:Weston & Sampson Engineers Inc.Five Centennial DriveUS-PEABODY, MA 01960+1 978 532 1900METEO - Power Curve AnalysisCalculation: RERL MET mast - production @ 65mName: Certified Power CurveSource: ManufacturerCalculated:02/19/2009 2:24 PM/2.6.1.252WTG: ELECON - TURBOWINDS T600-48 DS 600-120 48.0 !O! Certified Power Curve, Hub height: 65.0 mSource/Date Created by Created Edited Stop wind speed Power control CT curve type[m/s]10/28/2008 USER 11/03/2008 11/04/2008 25.0 Active stall Standard stallHP curve comparison - Note: For standard air density and weibull k parameter = 2Vmean [m/s] 5 6 7 8 9 10HP value [MWh] 887 1,373 1,854 2,296 2,692 3,046ELECON - TURBOWINDS T600-48 DS 600-120 48.0 !O![MWh] 901 1,402 1,905 2,366 2,762 3,086Check value [%] -2 -2 -3 -3 -3 -1The table shows comparison between annual energy production calculated on basis of simplified "HP-curves" which assume that all WTG's performs quite similar - only specific power loading (kW/m^2) andsingle/dual speed or stall/pitch decides the calculated values. Productions are without wake losses.For further details, ask at the Danish Energy Agency for project report J.nr. 51171/00-0016 or see WindPRO manual chapter 3.5.2.The method is refined in EMD report "20 Detailed Case Studies comparing Project Design Calculations and actual Energy Productions for Wind Energy Projects worldwide", jan 2003.Use the table to evaluate if the given power curve is reasonable - if the check value are lower than -5%, the power curve probably is too optimistic due to uncertainty in power curve measurement.Power curveOriginal data from Windcat, Air density: 1.225 kg/m3Wind speed Power Ce Wind speed Ct curve[m/s] [kW] [m/s]1.1 -1.0 0.00 1.0 0.101.5 -0.7 0.00 2.0 0.102.0 -0.7 0.00 3.0 0.102.6 2.0 0.11 4.0 0.803.1 3.7 0.12 5.0 0.823.6 14.9 0.29 6.0 0.854.0 25.5 0.36 7.0 0.824.6 42.7 0.41 8.0 0.785.0 59.2 0.42 9.0 0.745.5 75.8 0.42 10.0 0.686.0 103.6 0.43 11.0 0.626.4 132.7 0.45 12.0 0.557.0 164.6 0.43 13.0 0.497.5 210.5 0.45 14.0 0.438.0 234.2 0.41 15.0 0.388.5 277.9 0.41 16.0 0.329.1 359.9 0.44 17.0 0.289.5 414.0 0.43 18.0 0.2510.0 469.4 0.42 19.0 0.2110.5 518.3 0.40 20.0 0.2011.0 545.0 0.37 21.0 0.1911.5 572.3 0.34 22.0 0.1712.0 598.9 0.31 23.0 0.1612.5 615.3 0.28 24.0 0.1513.0 625.9 0.25 25.0 0.1413.5 628.5 0.23 26.0 0.1314.0 615.7 0.20 27.0 0.1214.5 623.0 0.18 28.0 0.1115.0 621.2 0.17 29.0 0.1015.5 616.5 0.1516.0 611.7 0.1316.5 602.1 0.1217.1 605.4 0.1117.5 605.6 0.1018.0 603.9 0.0918.5 601.1 0.0819.0 605.4 0.08Power, Efficiency and energy vs. wind speedData used in calculation, Air density: 1.237 kg/m3Wind speed Power Ce Interval Energy Acc.Energy Relative[m/s] [kW] [m/s] [MWh] [MWh] [%]1.0 0.0 0.00 0.50- 1.50 0.0 0.0 0.02.0 0.0 0.00 1.50- 2.50 0.6 0.6 0.03.0 3.5 0.12 2.50- 3.50 6.7 7.2 0.54.0 25.8 0.36 3.50- 4.50 29.1 36.3 2.45.0 59.0 0.42 4.50- 5.50 69.5 105.8 7.16.0 104.1 0.43 5.50- 6.50 126.1 231.9 15.67.0 165.6 0.43 6.50- 7.50 187.5 419.4 28.28.0 237.4 0.41 7.50- 8.50 222.1 641.6 43.19.0 355.4 0.44 8.50- 9.50 233.6 875.2 58.810.0 471.7 0.42 9.50-10.50 217.2 1,092.4 73.411.0 546.8 0.37 10.50-11.50 163.6 1,256.0 84.412.0 598.9 0.31 11.50-12.50 106.2 1,362.2 91.613.0 625.3 0.25 12.50-13.50 62.2 1,424.4 95.814.0 615.7 0.20 13.50-14.50 33.1 1,457.5 98.015.0 621.0 0.16 14.50-15.50 16.4 1,473.8 99.116.0 612.1 0.13 15.50-16.50 7.7 1,481.5 99.617.0 604.9 0.11 16.50-17.50 3.4 1,484.9 99.818.0 603.9 0.09 17.50-18.50 1.5 1,486.4 99.919.0 605.3 0.08 18.50-19.50 0.6 1,487.0 100.020.0 605.4 0.07 19.50-20.50 0.2 1,487.3 100.021.0 605.4 0.06 20.50-21.50 0.1 1,487.4 100.022.0 605.4 0.05 21.50-22.50 0.0 1,487.4 100.023.0 605.4 0.04 22.50-23.50 0.0 1,487.4 100.024.0 605.4 0.04 23.50-24.50 0.0 1,487.4 100.025.0 605.4 0.03 24.50-25.50 0.0 1,487.4 100.0WindPRO is developed by EMD International A/S, Niels Jernesvej 10, DK-9220 Aalborg Ø, Tlf. +45 96 35 44 44, Fax +45 96 35 44 46, e-mail: windpro@emd.dk