FIGURE 5-14: Upwind rotor of intermediate solidity with tail fin control.
FIGURE 5-15: Downwind rotor.
FIGURE 5-16: Downwind rotor with fen tail control.

FIGURE 5-17:

Small wind tL^bine generator with two upwind blades.

FIGURE 5-18A: Typical wind power curves.
FIGURE S-18B: Typical wind powsr curves.
Renewable Energy 101

Renewable Energy 101

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable. The usage of renewable energy sources is very important when considering the sustainability of the existing energy usage of the world. While there is currently an abundance of non-renewable energy sources, such as nuclear fuels, these energy sources are depleting. In addition to being a non-renewable supply, the non-renewable energy sources release emissions into the air, which has an adverse effect on the environment.

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