Last day to turn in permission slip and $5

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• Welcome!
• Last day to turn in permission slip and 5
• Please get out paper for notes and read the board
  and power up.

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Todays lesson

• Nearpod.com
• Look for join session in upper right corner

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Harnessing the Wind were 1!

• Current largest wind farm Horse Hollow Wind
  Energy Center
• 421 wind turbines
• 735 megawatts.
• 47,000 acres of land in Taylor and Nolan County,
  Texas.

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Texas next cash crop?

• 500,000 Texas homes currently, expanding 10 times
  in next decade
• In 2012, wind generated 10,407 megawatts
• (1 megawatt 500 homes)
• 13 of states electricity

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How does it work?
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How does it work?

• Area swept by blades can be size of 747 plane
• Tips of blades can be going 200mph
• Height 240ft (taller than Statue of Liberty)
• Nacelle size of greyhound bus

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How does it work?

• Worlds largest German turbine (394-feet)
  behemoth capable of generating 5 MW

• Need 8 mi/hr winds to generate electricity max
  electrical production at 15-18 mi/hr winds
  turbines cut off at 55 mi/hr winds
• Yaw motor nacelle moves to face turbine
  directly into wind

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Applications

• Typical wind farm 100Megawatts (MW)
• Coal fired power plant 500-600 MW
• One 1.5MW turbine could power about 350 homes/year

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Best wind is in the morning, but peak demand is
in the afternoon ?
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So what if you currently have wind electricity?
Do your lights go out on still days?
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Our electric grid power plants connected to
consumers
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Our electric grid power plants connected to
consumers
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Advantages

• High efficiency
• Moderate capital cost
• No air pollution
• Can use land for grazing
• Renewable
• Domestic
• Able to use current electric grid

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Disadvantages

• Land use requires space
• Visual pollution some people dont like the
  look
• Noise 275 yards away, it sounds like a
  refrigerator
• Bird and bat deaths
• Winds peak in morning and March-May

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Wind in your home?
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