HomeMy WebLinkAboutSand Point Wind Monitoring Final Report - Jun 2009Results of Wind Monitoring at Sand Point
24 June, 2009
Report Outline
Project Overview/Summary of Results
Project Location
Project Instrumentation
Discussion of Wind Resource
Appendix
Project Overview/Summary of Results
As part of the NREL Native American Anemometer Loan Program an anemometers was installed near Sand Point,
Alaska to assess the area’s wind energy potential. This report describes the wind resource measured at this location.
The monitoring period ran from 14 February 2004 to 6 July 2005.
The measured average power density and wind speed, measured at 20m (66ft), are 424 W/m2 and 6.7 m/s (14.9
mph) respectively. This is consistent with the resource indicated by publically available wind maps. For example,
the 3Tier wind map (Figure 4) (http://firstlook.3tiergroup.com/) estimates the average wind speed at the site (@ 20m
AGL) at between 5.9 and 10.6 m/s. (13.1 mph – 23.6 mph)
The wind data for this site was processed using three different software packages. The first is a package, referred to
as the NREL Package” that has been developed at NREL for internal use. The advantage of this software package it
that it provides values for the power density. The values provided by this package will be used in the main body of
the report. The next package, WindPro, has been the software used to provide the interim plots during the
monitoring period. Windpro provides the capability to exclude zero’s (for wind speed) when calculating the average
wind speed and the analyzing the wind speed distribution. Finally, Windographer provides nice rose plots of both
frequency versus wind direction and relative energy versus wind direction. The values provided by the NREL
package will be used in the main body of the report, but occasionally, the Windpro and Windographer values will be
provided as well. The Windpro plots are provided in the back of this report.
Project Location
The monitoring site is located just north of Sand Point, AK (N 55.34567 q, W 160.48832 q) at an elevation of 52m
(170 ft). See Figure 1 through Figure 3. Figure 1 and Figure 2 also show the location of the reference site which
provides long term wind data. This can be used to determine how closely the collected data matches the long term
mean wind resource.
Project Instrumentation
The instrumentation consisted of an NRG Wind Explorer system. This included a cup anemometer, wind vane and
data logger. The instruments were mounted at a height of 20m (66ft) on a tilt-up tubular tower. The collected data
consisted of 10-minute average wind speed, including wind speed standard deviation and wind direction.
1
Figure 1: Project Location (Regional)
Figure 2: Project Location (Mid Scale)
2
Figure 3: Project Location (Close Up)
Figure 4: 3Tier Wind Map (Source:http://firstlook.3tiergroup.com/)
3
Discussion of Wind Resource
Figure 5 summarizes the collected wind data.
The values for the 50-meter wind speed and power density are conservative estimates using a wind shear factor of
0.15. The shear could well be higher in which case the average wind speed and power density (@ 50m AGL) will
be higher.
Average Wind
Speed (m/s)
Average Power
Density (W/m^2)
Average Annual Wind Speed & power density 6.7 m/s (14.9 mph) 424 W/m2
Average wind speed & power density for best
month (December) 8.2 m/s (18.2 mph) 694 W/m2
Average wind speed & power density for worst
month (July) 4.2 m/s (9.3 mph) 101 W/m2
Estimated Resource @ 50 meters 7.6 m/s (16.9 mph) 640 W/m2
Figure 5: Wind Data Summary
0.0
1.0
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4.0
5.0
6.0
7.0
8.0
9.0
0
100
200
300
400
500
600
700
800
900
Average Wind Speed (m/s)Average Wind Power Density (Watts/m^2)Month
Sand Point Monthly Wind Resource
(Measured at 20 m (66 ft))
Wind Power Density Site Wind Speed Reference Site Wind Speed
Figure 6: Monthly average and annual average wind power density and wind speed.
4
0.0
1.0
2.0
3.0
4.0
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6.0
7.0
8.0
9.0
10.0
0
50
100
150
200
250
300
350
400
450
500
123456789101112131415161718192021222324 Average Wind Speed (m/s)Average Wind Power Density (Watts/m^2)Hour
Sand Point Diurnal Wind Speed & Power
(Measured at 20 m (66 ft))
Wind Power Density Wind Speed
Figure 7: Average annual daily wind profile.
Speed and Power by Month
Figure 6 shows the monthly and annual average wind power density. The measured annual average power density is
424 W/m2. The measured annual average wind speed is 6.7 m/s (14.9 mph). The winter months have the greatest
wind resource while the early summer has the lowest wind resource. The wind resource at this site is extremely
seasonal, with the average wind speed varying by a factor of two between the summer and winter and the average
power density varying by a factor four. Figure 6 also shows the long term monthly average wind speeds for the
reference site. This data usually gives a better indication of how the wind resource varies by season than does the
collected data. In this case the measured data broadly follows the pattern of the reference site data. Compared to
the long term data, the monitoring period data shows a more pronounced difference between the summer and winter
wind speeds. Both the measured data and the reference data show a mid-winter dip in the monthly average wind
speeds. For the measured data this dip occurs in January compared to December for the reference data. Finally, the
lowest wind speed month in the collected data is July, compared to June for the reference site data.
Speed and Power by Hour
Figure 7 shows the annual average diurnal (daily) profile for the site. In general the winds are highest in the mid
afternoon and weakest in the very early morning. (See Appendix B for monthly profiles). Compared to most other
sites examined by this author, the diurnal profile at this site is weak. Be advised it is very possible that the diurnal
profile may shift with increasing height.
5
Wind Frequency Rose
0°
22.5°
45°
67.5°
90°
112.5°
135°
157.5°
180°
202.5°
225°
247.5°
270°
292.5°
315°
337.5°
2% calm
5%
10%
15%
Figure 8A: Frequency by direction.
Total Wind Energy (20 m)
0°
22.5°
45°
67.5°
90°
112.5°
135°
157.5°
180°
202.5°
225°
247.5°
270°
292.5°
315°
337.5°
6.67%
13.3%
20%
Figure 8B: Energy by direction.
6
Figure 8C: Reference Site frequency and mean wind speed by direction
Frequency and Speed by Direction
Both Figure 8A and 8B show the prevailing & energetic winds coming from the NNE and the west. The most
energetic winds come from NNE, with secondary peaks from the west and SSW. However, Figure 8C, which shows
the frequency and mean wind speed rose for the long term reference site data, indicates that a significant portion of
the winds come from the quadrant 270 – 360 degrees, (west – north). The lack of wind from this quadrant in the
measured wind data is noteworthy to the NREL meteorologist who reviewed this report. A possible explanation for
this observation is that the anemometer had poor exposure (for whatever reason) to the winds coming from this
direction.
Frequency of Speed and Percent of Power by Speed
Figure 9 shows the annual frequency distribution of wind speed and power density. The line labeled PCTs shows
the fraction of time that the wind falls within the specified bin. The line labeled PCTp shows the fraction of total
annual energy contributed by winds of the indicated wind speed bin. On an annual basis, while over half of the time
the wind speed is between 2 m/s and 9 m/s (61%), most of the wind energy is from winds with wind speeds from 7
to 15 m/s (64%). (See Appendix B).
The percentage of calms, 4.9%, while low, is a bit high for such a high wind speed site such as this one. This could
be due to the strong seasonal wind profile of this site, with very strong fall, winter, & spring winds and light summer
winds.
The best fit weibull distribution parameters for the measured data are k = 1.8 and c = 7.6. The k value indicates how
widely the winds are distributed. The weibull k value of this site, at less than 2, is more typical of a continental
inland site, than a coastal site such as this one. A possible explanation for the unusually low Weibull is the strong
seasonal wind profile at this site.
7
0.0
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4.0
6.0
8.0
10.0
12.0
012345678910111213141516171819202122232425Percent (%)Wind Speed (m/s)
Sand Point Wind Speed Distribution
(Measured at 20 m (66 ft))
PCTs PCTp
Figure 9: Annual wind and wind energy distribution.
8
Comparison of anemometer data with long term average data
An important consideration is the closeness with which the measured data reflects the long-term (multi-year)
average wind resource. In other words, does the monitoring period data reflect a good year, a bad year or an average
year? To answer this question long term data from a nearby reference site, Sand Point, was examined. For this site
the multi year average wind speed was compared to the wind speed during the monitoring period. The results are
given in the table and graph below.
0
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1
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1.6
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8
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Average RationoflongtemwindspeedormonitoringperiodwindspeedAverageWindSpeed(m/s)SandPoint
MonitoringPeriod&LongTerm WindData
MonitoringPeriod
Average
Ratio
Figure 11: Comparison of long term data with monitoring period data
Figure 11 and Figure 12 show the monitoring period average wind speed compared to the long-term mean wind
speed at the reference site. The data shows that during the monitoring period winds were higher than normal in the
fall and winter and lower than normal in the spring and summer. The ratio of 1.03 indicates that overall, the
monitoring period wind speeds at the reference station were slightly higher than the long-term mean wind speeds,
however the difference is small (< 5%) This gives evidence that in general, the winds during the monitoring period
are representative of the long term mean wind resource.
Lat Long
Monitoring
Period
Long
Term Ratio
Sand Point 55.32 160.53 5.06 4.91 1.03
Monitoring Site 55.35 160.49
Figure 12: Long term versus monitoring period wind data for reference stations.
9
Appendix A: Wind Data in Tabular Form
Table A1: Monthly average and annual average wind power density and wind speed.
Month
Wind Speed
(monitoring
site) (m/s)
Wind Power
(monitoring site)
(W/m^2)
Wind Speed
(Reference Site)
(Long Term)
(m/s)
Jan 6.4 448 5.4
Feb 8.0 681 5.7
Mar 8.1 642 5.1
Apr 7.0 431 4.3
May 6.2 256 3.8
Jun 5.3 170 3.6
Jul 4.2 101 4.1
Aug 5.0 198 4.9
Sep 6.3 316 5.8
Oct 7.5 458 6.4
Nov 8.3 692 5.7
Dec 8.2 694 4.3
Average 6.7 424 4.9
Table A2: Average annual daily wind profile.
Hour Wind Speed
(m/s)
Wind Power
(W/m^2)
16.5
26.5
36.4
46.4
56.4
66.4
76.3
86.4
96.5
10 6.6 418
11 6.7 429
12 6.8 421
13 7.0 440
14 7.2 439
15 7.3 460
16 7.4 482
17 7.3 462
18 7.1 433
19 6.9 419
20 6.8 406
21 6.7 398
22 6.6 410
23 6.5 404
24 6.5 392
393
388
379
382
395
398
387
401
431
10
Table A3: Frequency and Energy by direction.
F% %Pwr
Calm 4.9
22.5 11.3 19.3
45 7.7 9.3
67.5 6.2 4.6
90 5.8 3.4
112.5 5.2 2.2
135 4.6 2.5
157.5 6.9 4.3
180 8.8 9.8
202.5 7.1 10.1
225 5.4 3.5
247.5 7.5 10.6
270 10.2 16.7
292.5 2.3 1.3
315 2.0 0.4
337.5 1.7 0.3
360 2.6 1.6
Table A4: Annual wind and wind energy distribution.
Wind Speed
(m/s)PCTs PCTp
04.9
16.2
27.6
39.1
48.6
510.3
69.6
78.5
87.4
96.1
10 4.9 9.2
11 3.8 8.1
12 3.0 7.6
13 2.4 7.0
14 2.0 7.1
15 1.4 5.2
16 1.5 5.0
17 0.7 4.0
18 0.4 2.8
19 0.3 1.8
20 0.2 1.5
21 0.1 1.0
22 0.1 0.6
23 0.0 0.4
24 0.0 0.3
25 0.0 0.2
0.0
0.0
0.3
0.9
2.0
3.6
5.5
7.1
8.8
9.0
11
Appendix B: Interpretation of the Wind Data Charts
Introduction
This appendix is a guide to interpreting the wind data charts included in the report. Included are background
information and an explanation of the meaning of the data in each chart.
The annual results given in the charts in this appendix will differ somewhat from the results given in the charts in the
main body of the report. This is due to differences in how the data is processed. This is best described by using an
example. Let us assume that 15 months of data was collected from a site, with the monitoring period running from 1
January 2003 to 31 March 2004. The annual average numbers given in the appendix simply provide the average of
all the data collected. However this double counts the months of January, February & March. If these months tend
to be windier than the rest of the year, then the wind resource will be over estimated.
The proper procedure is to average together the data from the double counted months before averaging the data to
create annual averages. This is what has been done for the charts in the main body of the report.
The reason the software does not do this is that it was really designed to process multiyear data. If 9.5 years of data
are processed, having 10 Januarys and 9 Julys creates negligible error. However, with only a little over a year of
data, the double counted months can cause noticeable error.
Power Density versus Wind Speed
Wind turbines convert the kinetic energy of moving air into useful mechanical or electrical energy. The power of a
column of moving air is given by the equation below.
P = 0.5UAv3 (Equation B - 1)
Where
P = power in a column of air (watts)
U = density of air (kg/m3) (Roughly ~ 1 kg/m3)
A = cross sectional area of the column of air (m2)
v = velocity of the air (m/s)
Thus the power a wind turbine can extract from the wind is proportional to the cross sectional area of the rotor, the
density of the air, and the cube of the wind velocity. At a given location the air density typically doesn’t change by
more than 10%. Therefore the big variable is the wind speed. Annual average wind turbine production is very
sensitive to the annual average wind speed.
A wind turbine cannot extract all the energy from the air stream moving past it. A wind turbine’s extraction
efficiency typically varies with wind speed. In their range of maximum conversion efficiency most of today’s wind
turbines extract about 40% - 50 % of the wind’s energy.
Power density is simply the power divided by the cross sectional area. Power density is given in units of watts
per meter squared. (watts/m2)
Power Density = 0.5Uv3 (Equation B - 2)
The cubic dependence of wind power density upon velocity underscores the importance of accurately
characterizing the wind at a given location. A small uncertainty in wind speed translates to a large uncertainty in
wind turbine power production. For example a 5% uncertainty in wind speed leads to a 15% uncertainty in power
output. The cubic relationship also makes it more difficult to predict the long-term performance of a wind turbine.
More information is needed than simply the average wind speed. For example, imagine a location where the wind
speed is a constant five meters per second. The average power density of a column of air with a 1m^2 cross section
is then 0.5 * 1.0 kg/m3 * 1.0 m2 * 5 (m/s)3 = 62.5 watts. Over a year the total energy of that column would be
547.5 kWh (this is found by multiplying the average power density by the number of hours in a year, then dividing
by 1000 to convert to kilowatts). Now imagine a location where half the time the wind speed is 3 m/s and the other
12
half the time the wind speed is 7 m/s. The average wind speed is still 5 m/s but the average power density is now
0.5*1.0*1.0*(33 + 73)/2 = 92.5 watts. This leads to an annual energy of 810 kWh.
Power density is listed in many of the graphs below because power density gives a better indication of wind turbine
production than does wind speed alone. As can be seen from the graph titled “Speed and Power by Month,” power
density correlates to wind speed, but doesn’t follow wind speed exactly.
Wind Speeds/Wind Directions
These first plots simply show the wind speed and direction for the monitoring period. Good data is shown with a
solid line. Bad data is shown with a dotted line.
Speed and Power by Month
This graph gives the average wind speed and average power density for each month. This shows how the wind
resource is distributed throughout the year.
Observations by Month
This graph shows the number of observations for each month. The greater the number of observations, the greater
the probability the data is close to the long-term average resource.
Speed and Power by Hour
The top graph shows how the wind speeds and power densities are distributed by time of day over the whole year.
The other 12 graphs show the same thing for each month. On top of each graph is an average wind speed and power
density for the period in question.
Frequency and Speed by Direction
These graphs show how the winds are distributed by direction. The solid line shows the fraction of time that the
wind comes from a particular direction. The dotted line shows the average wind speed of the winds coming from a
particular direction. Above each graph the fraction of time that the wind is calm (below 1.0 m/s) is given. These
graphs indicate the directions from which the strongest winds come. Special care should be taken to ensure the wind
turbines have good exposure to winds from these directions.
Frequency of Speed and Percent of Power by Speed
These graphs show the distribution of wind speeds and power densities. The solid line indicates the fraction of time
that the wind has a particular velocity. The solid line indicates the fraction of the total wind power contributed by
winds at each wind speed.
13
Appendix C: Wind Data Graphs
NREL Software Package
14
0
5
10
15
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25
30
35
40
0 50 100 150 200 250 300 350
Julian Days
Station 000291 Sand Point 20m - Wind Speeds - 2004
Fri Apr 17 10:55:23 2009WS1
0
5
10
15
20
25
30
35
40
0 50 100 150 200 250 300 350
Julian Days
Station 000291 Sand Point 20m - Wind Speeds - 2005
Fri Apr 17 10:55:23 2009WS1
0
50
100
150
200
250
300
350
0 50 100 150 200 250 300 350
Julian Days
Station 000291 Sand Point 20m - Wind Directions - 2004
Fri Apr 17 10:55:33 2009WS1
0
50
100
150
200
250
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0 50 100 150 200 250 300 350
Julian Days
Station 000291 Sand Point 20m - Wind Directions - 2005
Fri Apr 17 10:55:33 2009WS1
15
Appendix D: Wind Data Graphs
WindPro
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 / 1
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
Data 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 07/05
1 (142) 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144
2 (124) 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144
3 144 144 144 144 144 144 144 144 144 144 (125) 144 144 (129) 144 144 144
4 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 (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)
7 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144
8 144 144 144 144 144 144 144 144 144 144 144 144 144 (113) 144 (126)
9 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 (115)
10 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144
11 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144
12 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144
13 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144
14 (45) 144 144 144 144 144 144 144 144 144 144 144 144 144 144 (135) 144
15 144 144 144 144 144 144 144 144 (138) 144 144 144 144 144 144 (132) 144
16 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144
17 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 (133) 144
18 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144
19 144 144 144 144 144 144 144 144 144 144 144 144 144 (136) 144 144 144
20 144 144 144 144 144 144 144 144 144 144 144 (103) 144 144 144 144 144
21 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144
22 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 (107)
23 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144
24 144 144 144 144 144 144 (128) 144 144 144 144 144 144 (136) 144 144 144
25 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144
26 144 144 144 144 144 144 144 144 144 144 144 (128) 144 144 144 144 (122)
27 144 144 144 144 144 144 144 144 144 144 144 (141) 144 144 144 144 144
28 144 144 144 144 144 144 144 144 144 144 144 144 144 144 (110) 144 144
29 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144
30 144 144 144 144 144 144 144 144 144 144 144 144 144 144 144
31 144 144 (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 5 2 3 6 3 1 35 22 0 19 23 0 0 0
20.50 - 21.49 115 0 33 6 1 1 2 1 1 19 22 0 9 20 0 0 0
21.50 - 22.49 63 0 17 7 0 2 3 1 1 8 15 0 0 9 0 0 0
22.50 - 23.49 36 0 11 9 0 0 2 1 0 5 8 0 0 0 0 0 0
23.50 - 24.49 17 0 3 5 0 0 4 0 0 2 3 0 0 0 0 0 0
24.50 - 25.49 20 0 5 7 0 0 2 2 1 0 3 0 0 0 0 0 0
25.50 - 26.49 9 0 5 1 0 0 0 0 1 0 2 0 0 0 0 0 0
26.50 - 27.49 3 0 0 0 0 0 0 0 0 3 0 0 0 0 0 0 0
27.50 - 28.49 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0
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