Environmental Engineering Reference
In-Depth Information
Figure 19: Guyed pole tower (credit: Bergey).
Figure 20: Tilt-up tower installation (credit: NRG).
Table 1: Effect of tower height on economics.
Annual energy
value ($)
Payback
(years)
Tower height (m)
Annual kWh
System cost ($)
18
2300
7800
460
17.0
24
2600
8250
520
15.9
30
2800
8600
560
15.4
The present author cannot recommend roof-mounted wind systems in general, and
increasing numbers of people concur [ 4 , 5 ].
2 Future developments
A number of areas are being explored by an ever-increasing number of small wind
turbine companies, with a view toward increasing reliability and reducing cost.
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