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Wind Power by Mind Map: Wind Power

1. Renewable

1.1. Clean

1.2. Nonpolluting

2. Kinetic

2.1. movement

2.2. 11 Quadrillion kw-hrs./yr.

2.2.1. kw-hr.

2.2.1.1. work by 1k watts/hr.

2.2.2. 10% of wind energy/yr. > earth's needs/yr.

3. Devices

3.1. Wind-Powered Sailing Ships

3.1.1. Egypt

3.1.2. 2800 B.C.

3.2. Windmills

3.2.1. Persia(Iran)

3.2.2. A.D. 600

3.2.3. convert a portion of kinetic energy into rotational energy

3.2.3.1. turns a shaft

3.2.3.1.1. operates machinery

3.3. wind turbines

3.3.1. modern

3.3.2. drive electric power generators

3.3.2.1. generate electric power

3.3.2.1.1. Denmark

3.3.2.1.2. U.S.

3.3.3. 25,000 by the 1990's

3.3.3.1. 0.1% world's power

3.4. wind farms

3.4.1. 2005

3.4.2. U.S.

3.4.2.1. < 1% power/yr.

4. Challenges

4.1. Kinetic Energy

4.1.1. only 59% transferred to blades

4.1.2. only 40% converted to useful rotational energy

4.2. Factors

4.2.1. practical

4.2.1.1. size

4.2.1.2. land

4.2.2. environmental

4.2.2.1. kills birds

4.2.2.2. noisy

4.2.3. speed of wind

4.2.3.1. varies over the earth

4.2.3.2. at times, dies down completely

4.2.3.3. counteract

4.2.3.3.1. storage systems

4.2.3.3.2. back-up generators