Wind is the movement of air from an area of high pressure to an area of low pressure. In fact, wind exists because the sun unevenly heats the surface of the Earth. As hot air rises, cooler air moves in to fill the void. As long as the sun shines, the wind will blow. And as long as the wind blows, people will harness it to power their lives.
Ancient mariners used…learn more>>
HOW WIND TURBINES WORK
An Animated Guide to the Science of Wind Turbines
… While we’ll leave the specifics up to the engineers, have you ever wondered what keeps these massive propellers in motion? We’ve wondered the same, so we put together a simple guide on how wind turbines work, which you can see below. engage with animated graphic>>
HOW MUCH ENERGY IS AVAILABLE FROM THE WIND
People think that as long as they can feel the wind, ample electricity should be generated from the wind turbine. They have often dreamed of a small wind turbine that can be installed on the roof of a house can provide all the energy they need. However, this is not the case. We should learn more on the limits of wind. Like anything in nature, there are limits to what is possible….The power available at a given wind speed passing through an area (e.g. a window) can be calculated by using the following formula: P = ½·ρ· A·v³, …Learn more>>
HOW MUCH POWER CAN WE EXTRACT?
In 1919, a German physicist Albert Betz, based on conservation of momentum and energy, he proved that the maximum possible energy that can be derived from a wind turbine cannot be more than 59.3 percent, or 16/27 of the potential energy in the wind.
In practice, no wind turbine has ever achieved the Betz limit….Learn more>>
THE BEAUFORT SCALE
Admiral Sir Francis Beaufort of the British navy developed a system in 1805 to estimate the wind strengths without the use of instruments. It is still in use today….see the chart>>
INSTALLED WIND CAPACITY
Click on the map below to see the animation which shows the progress of installed wind capacity between 1999 and 2015.
WIND RESOURCE ASSESSMENT AND CHARACTERIZATION
A crucial factor in the development, siting, and operation of a wind farm is the ability to assess and characterize available wind resources. The Wind Program supports efforts to accurately define, measure, and forecast the nation’s land-based and offshore wind resources. More accurate prediction and measurement of wind speed and direction allow wind farms to…continue reading>>
WIND TURBINES TYPES
Four Main Types of Wind Turbines
– Horizontal Axis Wind Turbine (HAWT) – UpWind
– Horizontal Axis Wind Turbine (HAWT) – DownWind
– Vertical Axis Wind Turbine (VAWT) – Drag based
– Vertical Axis Wind Turbine (VAWT) – Lift based
For more detail on these turbine types- jointiff.com
Wind energy costs are now lower than the costs of most new conventional sources and are close to cost-competitive with new natural gas generation due to continuing technological innovation. In fact, the price… Learn more>>.
– Incentives; The availability of incentives may greatly affect the economics of a wind project, large or small. The Database for State Incentives for Renewables and Efficiency (DSIRE) is the most current and comprehensive source of state incentives, policies, regulations and contacts pertaining to the purchase and installation of small wind systems and other technologies….Learn more>>
NOISES AND VIBRATIONS
TWELVE STATES PRODUCED 80% OF U.S. WIND POWER IN 2013
April 15, 2014 Principal contributor: Allen McFarland
In 2013, 12 states accounted for 80% of U.S. wind-generated electricity, according to preliminary generation data released in EIA’s March Electric Power Monthly report. Texas was again the top wind power state with nearly 36 million megawatthours (MWh) of electricity. Iowa was second, with more than 15 million MWh, followed by…Go to the map>>
TOP 10 THINGS YOU DIDN’T KNOW ABOUT WIND POWER
Liz Hartman August 18, 2014, Communications Team Lead, Wind and Water Power
U.S. WIND INDUSTRY FAST FACTS
The U.S. wind industry represents not only a large market for wind power capacity installations but also a growing market for American manufacturing. The following statistics provide a snapshot of the U.S. wind industry: