Gases released from power and manufacturing plants are considered a main contributor to global warming. This petrochemical plant spews flue gas at dawn. Such greenhouse gases are contributing to changes in climate.

The Benefits of Wind Turbine One of the main benefits of wind energy is economic gain, both for individuals and for communities. Individuals can save money on their energy bills, and even make money by generating wind power. Communities can diversify their economies and enjoy greater reliance on local resources when their members invest in wind.

This wind turbine supplements the power supply of a home. Though it may not be able to get all of its energy needs from the wind turbine, this home is taking the right step in helping out the environment

Turbine Comes in All Sizes Wind turbines for electricity generation emerged at the end of nineteenth centry. The technology grew and became mature for industrial applications since the 1980s. The typical size of wind turbines has been growing steadily in terms of rotor diameter and rated power over the past two to three decades.

As of early 2007, some manufacturers have started producing turbines with rated power of several MW and with rotor diameter of around 90 metres (e.g. Vestas V MW machine, Nordex N90 2.5MW machine), or even around 100 metres(e.g GE 3.6MW machine). These are primarily for the European market where good sites are at a premium and there is much pressure to make the most energy out of each available site. Another class of even larger wind turbines are designed or being prototyped primarily for offshore applications, such as the 5MW machine of RE Power with rotor diameter of 126 metres. 1) Power in the wind Energy in the wind is the kinetic energy it contains. For certain mass of air, the kinetic energy can be calculated by the formula below. Energy = 1/2 X Mass X (Velocity)^2 It can be easily shown that the power of the wind flowing through a certain area is given by Power = 1/2 X Air Density X Area X (Velocity)^3 Where power is in watts, air Density is in kg/m3 Area is the cross-sectional area of the flowing air in m2, Velocity is in m/s At sea level and at 15 degrees Celsius, dry air has a density of approximately kg/m3. varying with pressure and temperature. Air density decreases with increasing altitude. It can be seen that the power in the wind is proportional to the cube of the velocity, and is proportional to the swept area of the turbine rotor. However, only a fraction of this power can actually be extracted by the rotor. Power in Wind

The Cost There are several components in the cost of a wind project. They include the cost of the turbine itself, construction costs, interconnection fees, metering equipment, maintenance and repair, and any consulting services you use. How much your wind project costs will depend on your financing arrangements, the size of your project, and taxes.

Economic Analysis

Areas Utilizing Wind Turbine

There Are Some Risks Every financial investment carries with it a certain amount of risk. There are three basic ways of investing in wind energy, each of which entails a different level of risk. * Leasing Your Land: The least risky way to harvest the wind is to let someone else put up the capital and operate the wind project. You receive payments for the use of your property, while another party constructs and maintains the project. * Investing With Others: You can share the risks of a wind energy project by investing with others. The advantage to this approach is that you can share responsibilities and costs. * Investing On Your Own: The most risky method is to install and maintain your own turbine or turbines. You assume all the costs and responsibilities, but you also reap all the profits.

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