By Frank R Spellman
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Although there has been a 25% increase in wind turbine use in the last 12 years, wind energy still provides only a small percentage of the energy of the world. Wind Power: Where Eagles Don’t Dare 35 A construction permit is needed from the state or local air agency to control or mitigate these emissions; therefore, these emissions would not likely cause an exceedance of air quality standards or have an impact on climate change. Cultural Resources Direct impacts on cultural resources could occur from construction activities, and indirect impacts might be caused by soil erosion and increased accessibility to possible site locations.
2). 2 Horizontal-axis wind turbine components. WIND TURBINE COMPONENTS Anemometer—This device measures the wind speed and transmits wind speed data to the controller. Blades—Wind blowing over the two or three blades causes the blades to lift and rotate; they capture the kinetic energy of the wind and help the turbine rotate. Brake—A disc brake can be applied mechanically, electrically, or hydraulically to stop the rotor in emergencies. Controller—The controller starts up the machine at wind speeds of about 8 to 16 mph and shuts off the machine at about 55 mph.
In simple terms, wind is the response of the atmosphere to uneven heating conditions. The atmosphere of Earth is constantly in motion. Anyone observing the constant cloud movement and weather changes around them is well aware of this phenomenon. R. , Environmental Science and Technology, Government Institutes Press, Lanham, MD, 2006. 11 12 Environmental Impacts of Renewable Energy DID YOU KNOW? Wind speed is generally measured in meters per second (m/s), but Americans usually think in terms of miles per hour (mph).
Environmental Impacts of Renewable Energy by Frank R Spellman
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