Renewable Energy Technology Assessments - Kauai Island Utility ...
Renewable Energy Technology Assessments - Kauai Island Utility ... Renewable Energy Technology Assessments - Kauai Island Utility ...
Kaua’i Island Utility Cooperative Renewable Energy Technology Assessments 9.0 Wind Wind farms near Omao, Hanapepe, or Maha’ulepu would be similar to the Anahola installation involving road construction, ridgeline turbine placement, and short transmission extensions. A wind plant near Poipu would be similar to the Kalaheo project in that it would involve installation of turbines along flat terrain near the coast. It seems the best wind site is further from main transmission lines than at Kalaheo, so either a transmission extension or an upgrade of distribution lines leading to the wind site is needed. A distributed wind development would likely involve single turbines and/or small groups of turbines at several of the following locations: along the ridge in the Kokee area (investigated here), south of the Port Allen airport, the point north of Kilauea, the ridgeline north of Hanamaulu, individual locations scattered in the Poipu and Kalaheo areas, and potentially smaller developments on the six sites described above. Turbines or groups of turbines would be connected to distribution lines via individual transformers. Land ownership would be mixed. 9.5 Power and Energy Production The available wind data is not sufficient for a decisive assessment of energy production. Collection of wind data at 50 meters at prospective sites should be the first step in further pursuing wind power on Kauai. The available data along with the wind maps does give some indication of potential energy production, and Black & Veatch has made an analysis appropriate to the quality of data to give an indication of energy production potential. Use of 10 (or 3 in the case of Kokee) Vestas V47s with a 50 meter hub height has been assumed in all the analyses. 9.5.1 Plant Performance Average wind speeds at the three sites where data is available varied in both pattern and intensity, as summarized in Figure 9-7. This data needed to be assessed for application at the actual project areas. Because the Kalaheo and Anahola potential wind energy development sites are significantly far from their respective wind data towers, Black & Veatch utilized the wind map to approximate the ratio of wind speeds between the data location and the proposed turbine location. Furthermore, as the wind data collected at all three sites were lower than the proposed wind turbine’s hub height, wind speeds were adjusted upward to 50 meters using a wind sheer factor of 0.1 for the two ridgeline sites (Anahola and Hanapepe) and 0.18 for the relatively flat costal site (Kalaheo). It can be seen in Figure 9-8 that the intensity is similar for these three wind sites but the distribution differences remain. 21 March 2005 9-16 Black & Veatch
Kaua’i Island Utility Cooperative Renewable Energy Technology Assessments 9.0 Wind Wind Speed m/s Wind Speed m/s 12 10 8 6 4 2 0 12 10 8 6 4 2 0 Anahola Hanapepe Port Allen 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Figure 9-7. Measured Anemometer Site Hourly Average Wind Speeds. Kalaheo Hanapepe Anahola 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Figure 9-8. Estimated Turbine Site Hourly Average Wind Speeds. 21 March 2005 9-17 Black & Veatch
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Kaua’i <strong>Island</strong> <strong>Utility</strong> Cooperative<br />
<strong>Renewable</strong> <strong>Energy</strong> <strong>Technology</strong> <strong>Assessments</strong> 9.0 Wind<br />
Wind Speed m/s<br />
Wind Speed m/s<br />
12<br />
10<br />
8<br />
6<br />
4<br />
2<br />
0<br />
12<br />
10<br />
8<br />
6<br />
4<br />
2<br />
0<br />
Anahola<br />
Hanapepe<br />
Port Allen<br />
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24<br />
Figure 9-7. Measured Anemometer Site Hourly Average Wind Speeds.<br />
Kalaheo<br />
Hanapepe<br />
Anahola<br />
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24<br />
Figure 9-8. Estimated Turbine Site Hourly Average Wind Speeds.<br />
21 March 2005 9-17 Black & Veatch