How Wind Power Is Generated The terms "wind energy" or "wind power" describe the process by which the wind is used to generate mechanical power or electricity.
One of the most controversial projects right now has been proposed for Nantucket Sound, off the coast of Cape Cod in Massachusetts see www.
If wind generating systems are compared with fossil-fueled systems on a "life-cycle" cost basis counting fuel and operating expenses for the life of the generatorhowever, wind costs are much more competitive with other generating technologies because there is no fuel to purchase and minimal operating expenses.
A modern windmill, like this one in a field in Pennsylvania, has three, streamlined blades for catching the wind and generating electricity.
ON are the leading offshore operators. Wind Turbine Types Modern wind turbines fall into two basic groups; the horizontal-axis variety, like the traditional farm windmills used for pumping water, and the vertical-axis design, like the eggbeater-style Darrieus model, named after its French inventor.
Modern windmills, also called wind turbines, come in a variety of styles and sizes. Fifty or more years ago, farmers used windmills like the one shown in the foreground to pump water.
Right now, the United States gets less than one-tenth of a percent of its electricity from wind energy, Johnson says. One of the biggest problems with wind, they say, is its unreliability. Ugly turbines Another criticism of wind turbines is more personal.
Wind is also an increasingly valuable source of energy—helping to bring electricity into our lives. Wind is the fastest growing source of electricity in the world. And it can sometimes be the cheapest form of any kind of power, some experts say. Most have two or three blades that spin on an axle, which is attached to a gearbox.
Some turbines are more than feet tall. Turbine Components blade or rotor, which converts the energy in the wind to rotational shaft energy; a drive train, usually including a gearbox and a generator; a tower that supports the rotor and drive train; and other equipment, including controls, electrical cables, ground support equipment, and interconnection equipment.
Wind speed is a critical feature of wind resources, because the energy in wind is proportional to the cube of the wind speed. This mechanical power can be used for specific tasks such as grinding grain or pumping water or a generator can convert this mechanical power into electricity to power homes, businesses, schools, and the like.
In particular, induction generators cannot support the system voltage during faults, unlike steam or hydro turbine-driven synchronous generators. A wind farm may also be located offshore. Wind turbines convert the kinetic energy in the wind into mechanical power. These installations can utilize the more frequent and powerful winds that are available in these locations and have less aesthetic impact on the landscape than land based projects.
Finally, wind resource development may compete with other uses for the land, and those alternative uses may be more highly valued than electricity generation. Single small turbines, below 50 kilowatts, are used for homes, telecommunications dishes, or water pumping. Wind turbine diagram - click for enlarged image.
Offshore wind power and List of offshore wind farms Offshore wind power refers to the construction of wind farms in large bodies of water to generate electric power.
He sees great value in the wind-energy business.
A wind farm in Pennsylvania. A large wind farm may consist of several hundred individual wind turbines distributed over an extended area, but the land between the turbines may be used for agricultural or other purposes.
Some of the first windmills were built more than 5, years ago, Johnson says, starting in the Middle East. Instead of using electricity to make wind, like a fan, wind turbines use wind to make electricity. Most of these problems have been resolved or greatly reduced through technological development or by properly siting wind plants.
A windmill does the same thing that a fan does—but in reverse. Emily Sohn Feb 28, — This will include power factorconstancy of frequency and dynamic behaviour of the wind farm turbines during a system fault. Unlike conventional power plants, wind plants emit no air pollutants or greenhouse gases.
Its blades have to catch gusts at the height above the ground at which the wind tends to be strongest.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. The Power of the Wind Training Guide is a series of training activities to be conducted with youth development facilitators to increase their knowledge and skills to effectively lead The Power of the Wind curriculum.
The terms wind energy or wind power describe the process by which the wind is used to generate mechanical power or electricity. Wind turbines convert the kinetic energy in the wind into mechanical power. Sep 10, · News about wind power.
Commentary and archival information about wind power from The New York Times. PowerWind Ltd. installs first wind turbine in Indiana The Shenandoah School Corporation has completed the installation of a wind turbine manufactured by PowerWind Ltd with the support of Energy and the project owner Performance Services.
Beyond environ - mental benefits and the reduction of electricity bills, the wind turbine provides an. The Wind Vision Report takes America’s current installed wind power capacity and assesses the potential benefits of various scenarios.Download