What is Wind strength?
You may be surprised by the following fact: wind is a form of solar energy. It is produced by rotation of the earth, the rough heating of the air by the sun, and the irregularities of the earth’s surface.
Wind flow patterns are alternation by vegetation, the earth’s ground, and bodies of water. Human uses this wind flow, or motion energy for many purposes such as flying a kite, sailing and generating electricity.
The words wind energy describes the time of action by which the wind is used to generate mechanical strength or electricity. A turbine converts the kinetic energy in the wind into mechanical strength. This mechanical strength can be used for many specific purposes (such as pumping water or grinding grain) or this mechanical strength can be converted into electricity by a generator.
So how does a wind turbine generate electricity? It is the opposite of a fan. Instead of consuming electricity, it makes electricity. When wind blows the blades of the turbine, it turns the blades and spins a shaft which is connected to a generator consequently making electricity.
Types of Wind Turbines
There are two main types of wind turbines: the vertical-axis turbine, and the horizontal-axis turbine. Horizontal-axis turbine is more functional and popular so we will only talk about it here. Horizontal-axis turbines usually have two or three blades. These three-bladed turbines are operated “upwind,” which method the blades are facing into the wind.
Sizes of Wind Turbines
Utility-extent turbines range in size from 100 kilowatts to as large as several megawatts. Larger turbines are grouped together into wind farms, which provide bulk strength to the electrical grid. Single small turbines that below 100 kilowatts are used for homes, water pumping or telecommunications dishes. Small turbines are sometimes used in connection with diesel generators, batteries, and photovoltaic systems. These systems are called hybrid wind systems and are typically used in far away, off-grid locations, where a connection to the utility grid is not obtainable.
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