Loading...
The URL can be used to link to this page
Your browser does not support the video tag.
Home
My WebLink
About
KSDP Radio wind project review, V3 Energy LLC, rev. 1
Douglas Vaught, P.E. V3 Energy, LLC 19211 Babrof Drive Eagle River, AK 99577 November 8, 2008 Kells Hetherington 830 AM KSDP Aleutian Peninsula Broadcasting, Inc. P.O. Box 328 Sand Point, AK 99661 Dear Mr Hetherington: I reviewed the NREL wind resource report conducted by NREL for the TDX met tower site in Sand Point and also evaluated the suitability of the met tower data for applicability at your project site. A summary view is that the wind resource measured at the TDX met tower site is outstanding, with an annual average wind speed of 6.7 m/s at 20 meters. This equates to Class 5 to 6 wind resource which is very promising for wind power development. Fortuitously, the TDX met tower site is quite near the proposed wind turbine project site. Given the comparability of terrain at the two sites and lack of significant topographic features between them, it is reasonable to conclude that the NREL data is well suited to predict wind turbine performance at your project site. Review of NREL wind resource report A review of the TDX met tower data indicates that a 20 meter met tower, loaned to TDX from NREL’s Wind Powering America program, was installed on February 14, 2004. Data was collected through July 6, 2005 when presumably the tower was removed and returned to NREL. The NREL data was supplied to me via KSDP Radio in Microsoft Excel spreadsheets, but completion of a new wind resource analysis was not necessary as NREL had completed on in October 2005 using WindPRO software (see attached report). This report indicates an annual average (mean of means) wind speed of 6.7 m/s at a 20 meter measurement height. Apparently only one anemometer was installed on the met tower so shear could not be directly calculated, but because Sand Point is mostly grassland and snow surface with no trees, one could expect low wind shear and hence a relatively low power law exponent for use in predicting turbine performance at hub heights exceeding 20 meters. The wind frequency rose in the NREL report indicates a high percentage of winds from north‐northeast, west, south, and a lesser percentage of winds from southwest, southeast, east and northeast. Winds from west‐northwest to north are infrequent. An overall view of the wind rose indicates that there does not appear to be a single prevailing wind direction in Sand Point. One data area of initial concern in the NREL report is turbulence intensity. A mean turbulence intensity of 0.141 is listed in the NREL report. At first glance, this is somwhat higher than desirable, but the mean turbulence intensity at 15 m/s is 0.134, likely classifying this site as a desirable IEC61400‐1 3rd edition Category C (IEC61400‐1 3rd ed. uses representative turbulence intensity, which wasn’t listed in the NREL report). Turbulence intensity is shown to be highest with easterly to southerly winds, but in reference to the wind frequency rose, one can see that winds from these directions are relatively infrequent and are likely gusting storm winds. The higher frequenc y north‐northeast and westerly winds have much lower turbulence intensities, what one would expect to see at a coastal, non‐forested site such as in Sand Point. Evaluation of project siting in relation to met tower location As one can see below in the topographic map and Google Earth images of Sand Point, the KSDP broadcasting tower and the TDX met tower site are in close proximity, approximately 1050 meters (3500 ft) apart. The proposed wind turbine site is within 100 meters of the KSDP tower, hence the distance from the wind turbine site to the location of the TDX met tower study remains at about 1000 meters. Given the flat nature of the terrain between the KSDP tower and the TDX met tower site, the lack of signficant topography near or between either site, and the predominately north‐northeast, west and south winds, one can readily see that the wind exposure of the two locations are essentially equivalent. Therefore, it is reasonable to conclude that the NREL wind resource study completed for the TDX met tower can be used to evaluate the wind resource potential of the KSDP wind turbine site. The NREL study indicates a highly robust wind resource (estimated at Class 5 to Class 6). At the short distance between the project site and the met tower site, a minor variation in wind speed, if this were to be the case, would mean little with respect to potential turbine performance at the KSDP wind turbine project site: turbine performance will still be extremely good. Topographic map of KSDP Tower and TDX met tower location Google Earth image of Sand Point and locations of KSDP Tower and TDX met tower location Google Earth close‐up view of the landscape between the KSDP Tower and the TDX met tower location WindPRO version 2.4.0.62 Apr 2004WindPRO 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.dkProject:Sand Point - TDXDescription:Data from file(s)Y:\5000\shared\Anemometer_Loan_Programs\WPA.NA.Loans\Sand Point - AK\wind data\Sand Point 040315.N04Y:\5000\shared\Anemometer_Loan_Programs\WPA.NA.Loans\Sand Point - AK\wind data\Sand Point 040214.N04Y:\5000\shared\Anemometer_Loan_Programs\WPA.NA.Loans\Sand Point - AK\wind data\Sand Point 041015.N04Y:\5000\shared\Anemometer_Loan_Programs\WPA.NA.Loans\Sand Point - AK\wind data\Sand Point 050223.csvPrinted/Page10/7/2005 10:47 AM / 1Licensed user:National Renewable Energy Laboratory1617 Cole Blvd. (MS3811) US-GOLDEN, CO 80401+1 303-384-7027Calculated:10/7/2005 10:47 AM/Meteo data report, height: 66.0 FeetName of meteo object: Sand Point - TDXData from: 2/14/2004 4:10 PM Data to: 7/6/2005 2:30 PM Observations: 73137 Observations per day: 144 Recovery rate: 100%day 02/04 03/04 04/04 05/04 06/04 07/04 08/04 09/04 10/04 11/04 12/04 01/05 02/05 03/05 04/05 05/05 06/05 07/051 (142) 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 1442 (124) 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 1443 144 144 144 144 144 144 144 144 144 144 (125) 144 144 (129) 144 144 1444 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 (123)5 144 144 144 144 144 144 144 144 144 144 144 144 144 144 (133) 144 (95)6 144 144 144 144 144 144 144 144 144 (117) 144 144 144 144 (137) 144 (88)7 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 1448 144 144 144 144 144 144 144 144 144 144 144 144 144 (113) 144 (126)9 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 (115)10 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 14411 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 14412 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 14413 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 14414 (45) 144 144 144 144 144 144 144 144 144 144 144 144 144 144 (135) 14415 144 144 144 144 144 144 144 144 (138) 144 144 144 144 144 144 (132) 14416 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 14417 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 (133) 14418 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 14419 144 144 144 144 144 144 144 144 144 144 144 144 144 (136) 144 144 14420 144 144 144 144 144 144 144 144 144 144 144 (103) 144 144 144 144 14421 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 14422 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 (107)23 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 14424 144 144 144 144 144 144 (128) 144 144 144 144 144 144 (136) 144 144 14425 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 14426 144 144 144 144 144 144 144 144 144 144 144 (128) 144 144 144 144 (122)27 144 144 144 144 144 144 144 144 144 144 144 (141) 144 144 144 144 14428 144 144 144 144 144 144 144 144 144 144 144 144 144 144 (110) 144 14429 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 14430 144 144 144 144 144 144 144 144 144 144 144 144 144 144 14431 144 144 (126) 144 144 144 144 144 144% (100) (100) 100 100 100 (100) (100) 100 (100) 100 (99) (98) 100 (100) (98) (99) (98) (91) WindPRO version 2.4.0.62 Apr 2004 WindPRO 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 Project: Sand Point - TDX Description: Data from file(s) Y:\5000\shared\Anemometer_Loan_Programs\WPA.NA.Loans\Sand Point - AK\wind data\Sand Point 040315.N04 Y:\5000\shared\Anemometer_Loan_Programs\WPA.NA.Loans\Sand Point - AK\wind data\Sand Point 040214.N04 Y:\5000\shared\Anemometer_Loan_Programs\WPA.NA.Loans\Sand Point - AK\wind data\Sand Point 041015.N04 Y:\5000\shared\Anemometer_Loan_Programs\WPA.NA.Loans\Sand Point - AK\wind data\Sand Point 050223.csv Printed/Page 10/7/2005 10:47 AM / 2 Licensed user: National Renewable Energy Laboratory 1617 Cole Blvd. (MS3811) US-GOLDEN, CO 80401 +1 303-384-7027 Calculated: 10/7/2005 10:47 AM/ Meteo data report, height: 66.0 Feet Name of meteo object: Sand Point - TDX Monthly mean values of wind speed in m/s Month 2004 2005 mean mean of months Jan 6.5 6.5 6.5 Feb 6.5 8.9 8.0 7.7 Mar 7.8 8.5 8.1 8.1 Apr 7.2 7.0 7.1 7.1 May 5.8 6.7 6.3 6.3 Jun 5.7 5.1 5.4 5.4 Jul 4.3 4.2 4.3 4.2 Aug 5.0 5.0 5.0 Sep 6.3 6.3 6.3 Oct 7.5 7.5 7.5 Nov 8.3 8.3 8.3 Dec 8.3 8.3 8.3 mean, all data 6.6 7.0 6.8 mean of months 6.6 6.7 6.7 Wind speed [m/s]NNNWW N W W W S W SSWSSSEESE E E N ENNE25 20 15 10 5 0 25 20 15 10 5 0 25 20 15 10 5 0 2520151050 Wind speed. Height: 66.0 Feet Wind direction. Height: 66.0 Feet Hour 2423222120191817161514131211109876543210[m/s]7 6 5 4 3 2 1 0 Degrees350 300 250 200 150 100 50 0 Wind speed. Height: 66.0 Feet Wind direction. Height: 66.0 Feet Month 121110987654321[m/s]8 6 4 2 0 Degrees350 300 250 200 150 100 50 0 Wind speed 7/1/20056/1/20055/1/20054/1/20053/1/20052/1/20051/1/200512/1/200411/1/200410/1/20049/1/20048/1/20047/1/20046/1/20045/1/20044/1/20043/1/2004[m/s]25 20 15 10 5 0 Wind direction 7/1/20056/1/20055/1/20054/1/20053/1/20052/1/20051/1/200512/1/200411/1/200410/1/20049/1/20048/1/20047/1/20046/1/20045/1/20044/1/20043/1/2004[Degrees]350 300 250 200 150 100 50 0 Turbulence intensity V>4.0 m/s 7/1/20056/1/20055/1/20054/1/20053/1/20052/1/20051/1/200512/1/200411/1/200410/1/20049/1/20048/1/20047/1/20046/1/20045/1/20044/1/20043/1/2004[]0.8 0.6 0.4 0.2 0 WindPRO version 2.4.0.62 Apr 2004 WindPRO 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 Project: Sand Point - TDX Description: Data from file(s) Y:\5000\shared\Anemometer_Loan_Programs\WPA.NA.Loans\Sand Point - AK\wind data\Sand Point 040315.N04 Y:\5000\shared\Anemometer_Loan_Programs\WPA.NA.Loans\Sand Point - AK\wind data\Sand Point 040214.N04 Y:\5000\shared\Anemometer_Loan_Programs\WPA.NA.Loans\Sand Point - AK\wind data\Sand Point 041015.N04 Y:\5000\shared\Anemometer_Loan_Programs\WPA.NA.Loans\Sand Point - AK\wind data\Sand Point 050223.csv Printed/Page 10/7/2005 10:47 AM / 3 Licensed user: National Renewable Energy Laboratory 1617 Cole Blvd. (MS3811) US-GOLDEN, CO 80401 +1 303-384-7027 Calculated: 10/7/2005 10:47 AM/ Meteo data report, height: 66.0 Feet Name of meteo object: Sand Point - TDX Frequency Wind speed Sum N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW 0.00 - 0.49 1,433 62 59 69 99 73 135 160 154 132 112 100 42 67 60 40 69 0.50 - 1.49 3,782 115 167 187 246 299 393 392 348 354 258 232 154 135 153 166 183 1.50 - 2.49 4,944 204 301 292 284 397 522 405 377 377 327 293 229 211 192 274 259 2.50 - 3.49 6,117 276 472 284 325 473 550 312 376 504 418 328 388 392 322 348 349 3.50 - 4.49 7,050 252 621 445 429 479 418 269 519 824 416 450 515 712 278 240 183 4.50 - 5.49 7,706 247 756 514 500 475 431 304 595 841 506 502 700 874 192 135 134 5.50 - 6.49 7,556 242 816 577 510 393 320 325 591 693 529 587 650 921 164 116 122 6.50 - 7.49 6,711 198 1,024 562 459 321 251 235 507 482 476 534 609 736 111 109 97 7.50 - 8.49 6,026 144 990 579 402 223 176 183 459 384 500 477 540 725 122 69 53 8.50 - 9.49 4,903 109 872 489 344 195 134 242 293 359 432 293 390 604 69 52 26 9.50 - 10.49 4,167 95 716 441 267 175 133 179 230 330 349 211 412 538 59 24 8 10.50 - 11.49 3,144 68 533 370 137 95 104 85 186 243 275 117 423 452 48 7 1 11.50 - 12.49 2,462 32 416 315 92 79 34 57 155 195 260 92 297 404 24 9 1 12.50 - 13.49 1,916 41 361 218 66 66 24 63 52 175 214 65 181 362 14 14 0 13.50 - 14.49 1,584 18 343 183 43 38 14 49 31 160 158 50 168 318 8 3 0 14.50 - 15.49 1,150 23 223 111 36 40 7 35 18 136 151 17 138 205 10 0 0 15.50 - 16.49 771 15 147 50 24 34 3 22 12 76 102 13 96 166 11 0 0 16.50 - 17.49 512 5 100 20 18 22 4 9 7 62 68 5 56 125 11 0 0 17.50 - 18.49 369 2 74 22 9 24 4 7 11 48 61 0 25 73 9 0 0 18.50 - 19.49 250 1 39 14 6 14 7 7 17 41 53 0 19 31 1 0 0 19.50 - 20.49 156 0 37 523631352201923000 20.50 - 21.49 115 0 33 61121119220920000 21.50 - 22.49 63 0 17 702311815009000 22.50 - 23.49 36 0 11 90021058000000 23.50 - 24.49 17 0 3 50040023000000 24.50 - 25.49 20 0 5 70022103000000 25.50 - 26.49 9 0 5 10000102000000 26.50 - 27.49 3 0 0 00000030000000 27.50 - 28.49 1 0 0 00000010000000 Sum 72,973 2,149 9,141 5,782 4,299 3,921 3,683 3,348 4,943 6,489 5,740 4,366 6,060 8,103 1,858 1,606 1,485 Turbulence Wind speed Sum N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW 0.00 - 0.49 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.50 - 1.49 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.50 - 2.49 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 2.50 - 3.49 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 3.50 - 4.49 0.152 0.154 0.141 0.143 0.140 0.145 0.169 0.176 0.191 0.167 0.140 0.136 0.132 0.145 0.153 0.149 0.149 4.50 - 5.49 0.146 0.147 0.139 0.131 0.129 0.134 0.160 0.183 0.180 0.165 0.139 0.129 0.138 0.139 0.150 0.143 0.146 5.50 - 6.49 0.148 0.147 0.137 0.136 0.130 0.135 0.157 0.178 0.182 0.168 0.135 0.143 0.142 0.140 0.148 0.140 0.167 6.50 - 7.49 0.141 0.143 0.126 0.125 0.123 0.146 0.161 0.178 0.177 0.163 0.134 0.129 0.140 0.135 0.154 0.146 0.159 7.50 - 8.49 0.138 0.137 0.124 0.124 0.119 0.131 0.159 0.182 0.177 0.165 0.127 0.128 0.135 0.136 0.148 0.145 0.153 8.50 - 9.49 0.141 0.148 0.125 0.127 0.122 0.130 0.167 0.181 0.184 0.164 0.133 0.139 0.137 0.141 0.165 0.141 0.152 9.50 - 10.49 0.136 0.128 0.121 0.123 0.117 0.134 0.157 0.173 0.174 0.162 0.125 0.126 0.132 0.136 0.155 0.129 0.144 10.50 - 11.49 0.137 0.122 0.120 0.124 0.126 0.139 0.153 0.183 0.179 0.164 0.122 0.124 0.138 0.139 0.151 0.140 0.179 11.50 - 12.49 0.134 0.117 0.121 0.117 0.122 0.132 0.148 0.181 0.172 0.156 0.120 0.128 0.136 0.141 0.146 0.137 0.108 12.50 - 13.49 0.137 0.129 0.123 0.122 0.126 0.134 0.155 0.171 0.176 0.159 0.123 0.130 0.136 0.151 0.154 0.144 13.50 - 14.49 0.136 0.116 0.122 0.118 0.134 0.131 0.164 0.176 0.180 0.150 0.119 0.134 0.141 0.148 0.163 0.136 14.50 - 15.49 0.134 0.120 0.118 0.116 0.147 0.148 0.152 0.180 0.176 0.150 0.124 0.131 0.131 0.143 0.211 15.50 - 16.49 0.132 0.119 0.114 0.115 0.143 0.142 0.157 0.172 0.177 0.144 0.118 0.119 0.134 0.141 0.164 16.50 - 17.49 0.137 0.119 0.126 0.121 0.142 0.150 0.186 0.166 0.183 0.146 0.124 0.136 0.132 0.144 0.155 17.50 - 18.49 0.135 0.133 0.122 0.108 0.121 0.151 0.151 0.173 0.177 0.147 0.118 0.128 0.147 0.157 18.50 - 19.49 0.134 0.103 0.119 0.108 0.124 0.138 0.136 0.185 0.170 0.141 0.122 0.132 0.145 0.124 19.50 - 20.49 0.132 0.123 0.107 0.124 0.125 0.165 0.177 0.181 0.135 0.118 0.128 0.150 20.50 - 21.49 0.130 0.119 0.116 0.117 0.193 0.150 0.171 0.155 0.139 0.125 0.124 0.146 21.50 - 22.49 0.126 0.122 0.110 0.102 0.156 0.159 0.145 0.134 0.118 0.144 22.50 - 23.49 0.122 0.115 0.112 0.153 0.147 0.125 0.128 23.50 - 24.49 0.136 0.110 0.139 0.155 0.131 0.137 24.50 - 25.49 0.122 0.109 0.112 0.140 0.142 0.131 0.139 25.50 - 26.49 0.114 0.105 0.117 0.116 0.135 26.50 - 27.49 0.125 0.125 27.50 - 28.49 0.106 0.106 Sum 0.141 0.141 0.127 0.126 0.126 0.137 0.160 0.179 0.180 0.162 0.129 0.132 0.137 0.141 0.153 0.143 0.155 WindPRO version 2.4.0.62 Apr 2004 WindPRO 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 Project: Sand Point - TDX Description: Data from file(s) Y:\5000\shared\Anemometer_Loan_Programs\WPA.NA.Loans\Sand Point - AK\wind data\Sand Point 040315.N04 Y:\5000\shared\Anemometer_Loan_Programs\WPA.NA.Loans\Sand Point - AK\wind data\Sand Point 040214.N04 Y:\5000\shared\Anemometer_Loan_Programs\WPA.NA.Loans\Sand Point - AK\wind data\Sand Point 041015.N04 Y:\5000\shared\Anemometer_Loan_Programs\WPA.NA.Loans\Sand Point - AK\wind data\Sand Point 050223.csv Printed/Page 10/7/2005 10:47 AM / 4 Licensed user: National Renewable Energy Laboratory 1617 Cole Blvd. (MS3811) US-GOLDEN, CO 80401 +1 303-384-7027 Calculated: 10/7/2005 10:47 AM/ Meteo data report, height: 66.0 Feet Name of meteo object: Sand Point - TDX Frequency Series 0 Weibull A: 7.6 m/s k: 1.75 Vm: 6.8 m/s Wind speed 35302520151050[%]10 9 8 7 6 5 4 3 2 1 0 Frequency NNWW SWSSEENE12 % 11 % 10 % 9 % 8 % 7 % 6 % 5 % 4 % 3 % 2 % 1 % 12 %10 %8 %6 %4 %2 % Turbulence V>4.0 m/s Series 0 Wind speed 2520151050 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Turbulence V>4.0 m/s NNWW SWSSEENE0.160 0.140 0.120 0.100 0.080 0.060 0.040 0.020 0.1500.1000.050 WindPRO version 2.4.0.62 Apr 2004 WindPRO 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 Project: Sand Point - TDX Description: Data from file(s) Y:\5000\shared\Anemometer_Loan_Programs\WPA.NA.Loans\Sand Point - AK\wind data\Sand Point 040315.N04 Y:\5000\shared\Anemometer_Loan_Programs\WPA.NA.Loans\Sand Point - AK\wind data\Sand Point 040214.N04 Y:\5000\shared\Anemometer_Loan_Programs\WPA.NA.Loans\Sand Point - AK\wind data\Sand Point 041015.N04 Y:\5000\shared\Anemometer_Loan_Programs\WPA.NA.Loans\Sand Point - AK\wind data\Sand Point 050223.csv Printed/Page 10/7/2005 10:47 AM / 5 Licensed user: National Renewable Energy Laboratory 1617 Cole Blvd. (MS3811) US-GOLDEN, CO 80401 +1 303-384-7027 Calculated: 10/7/2005 10:47 AM/ Meteo data report, height: 66.0 Feet Name of meteo object: Sand Point - TDX Weibull Data k-parameter correction: 0.0080/m Sector A- parameter Mean wind speed k- parameter Frequency Frequency Wind shear [m/s] [m/s] [%] 0-N 6.44 5.73 1.754 2.94 2.9 0.00 1-NNE 9.29 8.23 2.082 12.53 12.5 0.00 2-NE 8.82 7.81 2.154 7.92 7.9 0.00 3-ENE 7.23 6.41 2.033 5.89 5.9 0.00 4-E 6.36 5.72 1.542 5.37 5.4 0.00 5-ESE 5.40 4.89 1.474 5.05 5.0 0.00 6-SE 6.43 5.76 1.607 4.59 4.6 0.00 7-SSE 6.88 6.10 1.944 6.77 6.8 0.00 8-S 7.36 6.64 1.510 8.89 8.9 0.00 9-SSW 8.79 7.81 1.823 7.87 7.9 0.00 10-SW 7.04 6.23 2.250 5.98 6.0 0.00 11-WSW 8.52 7.55 1.982 8.30 8.3 0.00 12-W 9.05 8.02 1.988 11.10 11.1 0.00 13-WNW 5.51 4.99 1.469 2.55 2.5 0.00 14-NW 4.42 3.98 1.531 2.20 2.2 0.00 15-NNW 3.96 3.54 1.649 2.03 2.0 0.00 mean 7.65 6.81 1.747 100.00 100.0 0.00 Frequency Total A: 7.6 m/s k: 1.75 Vm: 6.8 m/s N A: 6.4 m/s k: 1.75 Vm: 5.7 m/s NNE A: 9.3 m/s k: 2.08 Vm: 8.2 m/s NE A: 8.8 m/s k: 2.15 Vm: 7.8 m/s ENE A: 7.2 m/s k: 2.03 Vm: 6.4 m/s E A: 6.4 m/s k: 1.54 Vm: 5.7 m/s ESE A: 5.4 m/s k: 1.47 Vm: 4.9 m/s SE A: 6.4 m/s k: 1.61 Vm: 5.8 m/s SSE A: 6.9 m/s k: 1.94 Vm: 6.1 m/s S A: 7.4 m/s k: 1.51 Vm: 6.6 m/s SSW A: 8.8 m/s k: 1.82 Vm: 7.8 m/s SW A: 7.0 m/s k: 2.25 Vm: 6.2 m/s WSW A: 8.5 m/s k: 1.98 Vm: 7.6 m/s W A: 9.0 m/s k: 1.99 Vm: 8.0 m/s WNW A: 5.5 m/s k: 1.47 Vm: 5.0 m/s NW A: 4.4 m/s k: 1.53 Vm: 4.0 m/s NNW A: 4.0 m/s k: 1.65 Vm: 3.5 m/s Wind speed 23222120191817161514131211109876543210[%]19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0