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solar energy 
Wed Dec 28, 2011 at 08:05:42 AM MST
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Past wind farm deployments and advances in the wind energy sector have worked to open up new areas primed for future deployment. As tower heights rise from 50 meters to 80 meters above the ground, turbine can capture more wind captured at one time (higher wind speeds are usually present away from the ground) as well as during more parts of the day.
The result is that instead of 7.4-8.4 m/s wind speeds, new turbines can capture 8.5-10 m/s winds (see map below (gif source & pdf). This translates to a 1.2 cent reduction per kilowatt-hour of wind energy: 10.8 cents, down from 12.0 cents. My utility currently charges 4.6 cents per kilowatt-hour of energy. The utility's energy mix as of 2010 was: 61.31% coal, 26.88% natural gas, 10.26% wind, ~1% rest). They are also filing for a 5.99% increase in electricity charges.
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