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Capitol Hill in Washington, District of Columbia — The American Northeast (Mid-Atlantic)
 

Power from the Wind

Sustainable Solutions: Residential Wind Turbines

 
 
Power from the Wind Marker image. Click for full size.
By Bill Coughlin, November 11, 2011
1. Power from the Wind Marker
Inscription.
You are looking at a Windspire, a vertical-axis wind turbine that generates electricity from wind power. This model produces about 2,000 kWh of electricity a year in an area with average wind speeds of 12 mph (about the needs of the average house). It can be used on-grid to power homes, businesses, even large commercial buildings, and off-grid, etc. The model you are viewing is a “giromill” style, which used vertical airfoils that, just like the airplane wings, use the concept of “lift”. Lift enables the rotor to spin around a little faster than the speed of the wind.

Since it spins around a vertical axis, Windspire can catch the wind from any direction to turn the rotor without re-orienting itself. The airfoils also spin more slowly than the tips of propeller-style blades, rendering it virtually silent. Windspire was specifically designed with aesthetics and minimal cost in mind.

How can a wind turbine convert wind power into electricity?
In areas of sufficient sustained wind, the rotor is turned in the same manner as a windmill. The rotating center pole (as seen here, can be either on vertical or horizontal axis) is attached to a generator containing strong magnets and coils inside. As the magnets rotate around the coils of copper wire, a magnetic field is created, which induces
Marker at the Botanic Garden image. Click for full size.
By Bill Coughlin, November 11, 2011
2. Marker at the Botanic Garden
an electric current. The current is converted to useful AC current or DC current for battery-charging.

How much electricity does a residential-scale wind turbine produce?
A wind turbine produces different amounts of electricity at different wind speeds. At higher sustained wind speeds, more energy is produced (for reasons of safety, residential turbines are limited to a maximum velocity). The energy generated from a wind turbine depends on the “windiness” of your site as measured by both the sustained wind speed and annual seasonal variability of the wind. With this information, it is possible to calculate an estimate of the amount of energy you will generate over a year.


 
Erected by Department of Energy.
 
Location. 38° 53.314′ N, 77° 0.756′ W. Marker is in Capitol Hill, District of Columbia, in Washington. Marker is at the intersection of Maryland Avenue SW and 1st Street SW, on the right when traveling east on Maryland Avenue SW. Touch for map. Marker is located on the north side of the United States Botanic Garden. Marker is in this post office area: Washington DC 20560, United States of America.
 
Other nearby markers. At least 8 other markers are within walking distance of this marker. James A. Garfield (within shouting distance of this marker); a different marker also named Power from the Wind
Marker and Windspire image. Click for full size.
By Bill Coughlin, November 11, 2011
3. Marker and Windspire
The vertical-axis Windspire can be seen here behind the marker.
(within shouting distance of this marker); Ulysses S. Grant Memorial (about 400 feet away, measured in a direct line); Bartholdi Fountain (about 500 feet away); a different marker also named Ulysses S. Grant Memorial (about 500 feet away but has been reported missing); Naval Monument (about 800 feet away); Cardinal Direction Marker: North (approx. 0.2 miles away); Witchhazel Suhwe?t (suh-whet) (approx. 0.2 miles away). Touch for a list and map of all markers in Capitol Hill.
 
Categories. Man-Made Features
 
 
Credits. This page was last revised on June 16, 2016. This page originally submitted on November 19, 2011, by Bill Coughlin of North Arlington, New Jersey. This page has been viewed 428 times since then and 23 times this year. Photos:   1, 2, 3. submitted on November 19, 2011, by Bill Coughlin of North Arlington, New Jersey.
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