ML072040340

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Nrel: Classes of Wind Power Density
ML072040340
Person / Time
Site: Oyster Creek
Issue date: 06/29/2007
From:
National Renewable Energy Lab
To:
Office of Nuclear Reactor Regulation
Davis J NRR/DLR/REBB, 415-3835
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Download: ML072040340 (1)


Text

Wind Energy Resource Atlas of the United States Page 1 of I Table 1-1 Classes of wind power density at 10 m and 50 m(a).

Wind Power 10 m (33 ft) 50 m (164 ft)

Class* Wind Power Density (W/n ) Speed(b) r/s (mph)1[Wind Power Density (W/m 2 ) Speed(b) r/s (mph) 2 0 0 0 0 2 100 4.4 (9.8) 200 I 5.6 .5)

.150 5.1 (11.5) 300 6.4 (14.3) 200 5.6(12.5) 400 7.0(15.7) 65 250 300 6.0(13.4) 6.4 (.14.3)

[i 500 600 7.5(16.8) 8.0 (17.9) 400 '7.0(15.7) 800 8.8(19.7) 7 1000 9.4(21.1) 2000 I 11.9(26.6)

(a)'Vertical extrapolation of wind speed based on the 1/7 power law.

(b) Mean wind speed is based on Rayleigh speed distribution of equivalent mean wind power density. Wind speed is for standard sea-level conditions. To maintain the same power density, speed increases 3%/ 1000 m (5%/5000 ft) elevation.

  • WEB NOTE: Each wind power class should span two power densities. For example, Wind Power Class = 3 represents the Wind Power Density range between 150 W/m 2 and 200 W/m 2 . The offset cells in the first column attempt to illustrate this concept.

htlp://rredc.nrel.gov http://rredc.nrel.gov/wind/pubs/atlas/tables/l - I T.html CV%-L 14,Kr,-L '1065 6/29/2007