HomeMy WebLinkAboutYukon Region Wind Resource Summary Bethel Conference 2004Yukon-Kuskokwim Region
Wind Resource Summary
James Jensen
Alaska Energy Authority
Regional Wind Development Workshop
Bethel
Outline
•Sources of wind data
•Interpreting the wind data
•Results from 8 villages
•Potential wind power
production
Wind Map of Y-K Region
Class 6 and 7 Wind Regimes
Wind Power Classes
WPD (W/m^2)Speed (m/s)WPD (W/m^2)Speed (m/s)WPD (W/m^2)Speed (m/s)
1 <100 <4.4 <160 <5.1 <200 <5.6 Poor
2 100 - 150 4.4 - 5.1 160 - 240 5.1 - 5.8 200 - 300 5.6 - 6.4 Marginal
3 150 - 200 5.1 - 5.6 240 - 320 5.8 - 6.5 300 - 400 6.4 - 7.0 Fair
4 200 - 250 5.6 - 6.0 320 - 400 6.5 - 7.0 400 - 500 7.0 - 7.5 Good
5 250 - 300 6.0 - 6.4 400 - 480 7.0 - 7.4 500 - 600 7.5 - 8.0 Excellent
6 300 - 400 6.4 - 7.0 480 - 640 7.4 - 8.2 600 - 800 8.0 - 8.8
7 >400 >7.0 >640 >8.2 >800 >8.8 Outstanding
Class
Classes of Wind Power Density
10 m 30m 50m Rating
•Wind Power Density is what matters
•Dependent on Height
•Rating is subjective (large wind farms)
Wind Data Analysis
•Measure one year of data
•Filter out bad data
•Compare with long-term measurements
from nearby airport weather stations
•Make long-term predictions of
typical wind resource
at the site
Bethel Wind Resource
•165-foot tower
•Installed Dec 04 –Feb 06
•Average Speed:
100ft height -6.7 m/s (15 mph)
165ft height -7.3 m/s (16.3 mph)
•Wind Power Density:
100ft height –345 W/m2 (Class 4)
165ft height –440 W/m2 (Class 4)
Bethel Wind Resource
Wind Power Rose
•30m and 50m wind speeds
•Strongest winds in winter
-Coincides with high loads
-More difficult repairs
•Most of the Power in NE Winds
•Impacts turbine site selection
-Positioning of turbines
-Positioning of farm
Bethel Wind Resource
Cut In Cut Out
85% of winds are power producing
Bethel Wind Resource
0
2
4
6
8
10
12
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov DecWind Speed (m/s)0.0
4.5
8.9
13.4
17.9
22.4
26.8
Wind Speed (mph)Measured Met Tower Data (50m height)
Longterm Met Tower Estimate
Measured Airport Data (10m height)
Longterm Airport Data
Bethel Wind Resource
Month Data Recovery Rate Data Loss Due to Icing
January 2005 100%11%
February 2005 100%34%
March 2005 100%8%
April 2005 100%6%
May 2005 100%2%
June 2005 100%0%
July 2005 100%0%
August 2005 100%0%
September 2005 100%0%
October 2005 100%16%
November 2005 100%31%
December 2005 100%54%
Annual Average 100%13%
Iced Met Tower Anemometers
Toksook Bay Wind Resource
100-foot MET Tower
Installed June 04 –Aug 05
Annual average = 6.9 m/s (15.4mph)
Class 6
Photo: Doug Vaught, V3 Energy LLC
N
EW
S
6/17/2004 to 9/1/2005
Wind Rose Ch 1, 8 no TI
SITE 0071
Toksook Bay
Percent of Total Wind Energy
Percent of Total Time
Outer Numbers are Average TIs
Inner Circle = 0%
Outer Circle = 20%
Project:Toksook Bay
Location:
Elevation:65
for speeds greater than 50 m/s
NRG #40 Anem, m/s
Height:30 m
Serial #:S/N
#200P Wind Vane
Height:30 m
Serial #:SN:
Site Information:
Anemometer on channel 1:
Vane on channel 8:
Generated Tuesday, October 04, 2005 NRG Systems SDR Version 5.03Total 10-minute intervals: 63648 Intervals used in calculations: 60750 Percent data used: 95.4
.06.06.06
.05
.07
.08
.08
.08.08.13
.11
.09
.08
.09
.09.08N
EW
S
12/9/2004 to 7/20/2005Wind Rose Ch 1, 7 TI>4m/sSITE 5334Bethel
Percent of Total Wind Energy
Percent of Total Time
Outer Numbers are Average TIs
Inner Circle = 0%
Outer Circle = 40%
Project:
Location:
Elevation:128
for speeds greater than 4 m/s
NRG #40 Anem, m/s
Height:50 m
Serial #:SN:
#200P Wind Vane
Height:50 m
Serial #:SN:
Site Information:
Anemometer on channel 1:
Vane on channel 7:
Generated Tuesday, August 30, 2005 NRG Systems SDR Version 5.03Total 10-minute intervals: 32256 Intervals used in calculations: 32094 Percent data used: 99.5
Nightmute Wind Resource
Photos: Doug Vaught, V3 Energy LLC
100-foot tower
Installed June 04 –Sep 05
Annual average = 7.2 m/s (16.1 mph) Class 6
TI= std. dev. wind speed / average speed
Kongiganak Wind Resource
100-foot tower
Installed Oct 04 –Oct 05
Annual average = 7.9 m/s (17.7 mph) Class 6
N
EW
S
8/24/2004 to 10/18/2005
Wind Rose Ch 1, 7 No TI
SITE 5045
Kongiganak
Percent of Total Wind Energy
Percent of Total Time
Outer Numbers are Average TIs
Inner Circle = 0%
Outer Circle = 20%
Project:
Location:
Elevation:60 ft
for speeds greater than 50 m/s
NRG #40 Anem, m/s
Height:30 m
Serial #:SN:
#200P Wind Vane
Height:30 m
Serial #:SN:
Site Information:
Anemometer on channel 1:
Vane on channel 7:
Generated Monday, November 07, 2005 NRG Systems SDR Version 5.03Total 10-minute intervals: 60624 Intervals used in calculations: 52265 Percent data used: 86.2
Chevak Wind Resource
100-foot tower
Installed Dec 04 –Oct 06
Annual average = 7.6 m/s (17 mph) Class 6
Quinhagak Wind Resource
100-foot tower
Installed Oct 05 –Oct 06
Annual average = 6.4 m/s Class 3
Mekoryuk Wind Resource
100-foot tower
Installed Jun 05 –Feb 07
Annual average = 7.6 m/s Class 6
Power law exponent 0.127 (low wind shear)
Atmautluak Wind Resource
100-foot tower
Installed Oct 05 –Dec 06
Annual average = 7.2 m/s Class 5
Typical shear profile fluctuating with atm.
stability
Regional Wind Summary
Wind Map Predictions
Communities
Wind Power
Density (W/m2)
Wind
Class
Avg. Wind
Speed (30m)
Wind
Class Wind Speed
Nightmute 610 6 7.2 6 8.4
Kongiganak 562 6 7.9 4 6.7
Chevak 553 6 7.6 4 7.2
Mekoryuk 543 6 7.6 5 7.5
Toksook Bay 518 6 6.9 5 7.4
Autmautluk 451 5 7.2 4 7.4
Bethel 345 4 6.7 3 6.7
Quinkagak 340 3 6.4 3 6.5
Potential Wind Power Production
Photo: AVECVestas V15: 75 kW output, 15 meter rotor, stall-controlled, 25-meter hub height (power curve provided by Powercorp Alaska LLC)
Wind speed average at 25-m hub
height: 6.42 m/s
Capacity Factor: 21.4%
Annual energy output: 140,800 kW-
hr/yr
Potential Wind Power Production
Assumptions
•15% losses (icing, turbine maintenance, transmission losses, etc.)
•diesel generator efficiency of 15 kWh/gallon
Vestas V27 (225kW)Entegrity 15/50 (65kW)
kWh/yr
Fuel Saved
(gal) kWh/yr
Fuel Saved
(gal)
Bethel 559,423 37,295 119,804 7,987
Kongiganak 671,332 44,755 166,311 11,087
Conclusions
•MET tower installations show a superior
wind resource in Y-K communities
•Coastal communities have best resource
•Not all communities have a good resource
•Visit www.akenergyauthority.org for
complete wind reports