Performance - Wind Energy: Renewable Energy and the Environment - page 163

Light Fair Pump

14 4.0

3.5

12

3.0

10

2.5

8

2.0

6

1.5

4

1.0

2

0.5

0 0.0

0 040 0 80 100 120 140 160 180 200

Depth, m

FIGURE 8.13 Pump diameter to use for depth and amount of water that farm windmill would pump in light
and fair winds.

amount of water from the same depth ( Figure 8.15 ); however, during the low wind month of August,
the farm windmill pumped more water. The other aspect is that larger wind-electric systems can
pump enough water for villages [21] or low-volume irrigation [22].

8.8 WIND-DIESEL AND HYBRID
Around 1.6 * 10 9 people do not have access to electric power because they are too distant from trans-
mission lines of conventional electric power plants. Extension of the grid is too expensive for most

Bergey 1.5 Aeromotor

92
82
72
62
52
42
32
22
12
2

2 4 6 8 10 12 14 16 18

Wind Speed, m/s

FIGURE 8.14 Water flow rates for a mechanical, multibladed windmill (Aeromotor) and a Bergey (1.5 kW)
electric-to-electric water pumping system.