Environmental Engineering Reference
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Power Curve (Variation of θ
L
)
160
140
0°
30°
120
100
80
60
60°
40
90°
20
0
0
200
400
Resistance (kΩ)
600
800
1000
FIGURE 2.37
Power generated by the harvester with angles of
L
.
piezoelectric wind energy harvester. Bernoulli's equation in fluid dynam-
ics states that as the speed of a fluid (air/water) flow increases, its pressure
decreases. Hence, it is clear that the pressure differences around the piezo-
electric wind energy harvester are brought about by the variations in wind
speed (caused by the disruption and turning of the air flowing past the piezo-
electric wind energy harvester) at all points of the piezoelectric wind energy
harvester. From these experimental tests, it can be concluded that to get the
Power Curve (Variation of θ
W
)
160
140
0°
30°
120
100
80
60°
60
90°
40
20
0
0
200
400
Resistance (kΩ)
600
800
1000
FIGURE 2.38
Power generated by the harvester with angles of
W
.
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