Page 50 - Fluid Power Engineering
P. 50
28 Chapter Three
1400
1200
1000
Hours in a year 800 k=1
k=1.5
600
k=2
k=2.5
400 k=3
200
0
0 5 10 15 20 25
Wind speed, m/s
FIGURE 3-3 The Weibull probability density function expressed in hours per
year. The shaded area represents the number of hours in a year that wind
speed will be between 5 and 10 m/s for the k = 1 case.
0.18
0.16
0.14
0.12 A=5
Probability 0.08 A=6
0.1
A=7
0.06 A=8
0.04 A=9
0.02 A=10
0
0 5 10 15 20 25
Wind speed, m/s
FIGURE 3-4 Weibull probability density function for k = 2 and different values
of A.
