Wind Maps

[ Home ] [ Up ] [ Contents ] [ Search ] [ Catalog ]

US State Wind Maps	US Territories Wind Maps
USA Wind Map	US DOE Candidate Sites
Wind Atlas Table of Contents	US DOE Wind Classes
List of Maps

 

US DOE Wind Classes

Table 1-1 Classes of wind power density at 10 m and 50 m^(a)

Wind Power Class*	10 m (33 ft)		50 m (164 ft)
	Wind Power Density (W/m2)	Speed(b) m/s (mph)	Wind Power Density (W/m2)	Speed(b) m/s (mph)
1	0	0	0	0
	100	4.4 (9.8)	200	5.6 (12.5)
2
	150	5.1 (11.5)	300	6.4 (14.3)
3
	200	5.6 (12.5)	400	7.0 (15.7)
4
	250	6.0 (13.4)	500	7.5 (16.8)
5
	300	6.4 (14.3)	600	8.0 (17.9)
6
	400	7.0 (15.7)	800	8.8 (19.7)
7
	1000	9.4 (21.1)	2000	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, wind speed must increase 3%/1000 m (5%/5000 ft) elevation.