Renewable Energy Technology Assessments - Kauai Island Utility ...

Kaua’i Island Utility Cooperative
Renewable Energy Technology Assessments 9.0 Wind
energy yield of 20 GWh. Figure 9-9 shows power consumption for a Thursday in April
1996 with projected power production from a 6.6 MW Kalaheo project. The projected
production from this coastal site has an afternoon peak in all seasons, closely following
the load pattern.
Wind Capacity Factor
80%
70%
60%
50%
40%
30%
20%
10%
0%
Summer
Fall
Winter
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
21 March 2005 9-19 Black & Veatch
Spring
Load: Thurs. April 4,
1996
Figure 9-9. Diurnal and Seasonal Capacity Factor with KIUC Summer Loads and
Project Output, Kalaheo Area.
Hanapepe
Hanapepe site performance estimates were made using the 27 m (90 ft)
anemometer data scaled up to 50 meters using a wind sheer factor of 0.1 (appropriate for
ridgeline terrain). Black & Veatch did not have the precise location of the anemometer at
the time of writing this report and did not assume a location correction factor as with the
other two sites with data. The location of the anemometer appears close enough to a
likely site to use the scaled data directly. The wind speeds were then modeled with the
Vestas V47 power curve, air density information and other factors to estimate capacity
factor and the seasonal and diurnal power variation. Due to the unknown siting of the
anemometer, the production information herein is only an indication of pattern intensity.
Data at or near hub height from the proposed site is necessary to give a firm estimate of
production.
80
70
60
50
40
30
20
10
0
Load (MW)