# Wind Power as a Solution of the Energy Crisis

## Objective:

This essay aims to introduce the general aspects of wind energy, key wind effect parameters, and the available intensity based on local characteristics and introduce the idea of useful wind energy power.

Renewable Energy Sources are those energy which are collected from renewable resources, its energy is sustainable that can not end and these sources are not destroyed when their energy is harnessed. Human use of renewable energy requires technologies that control and make use of natural resources especially to produce energy such as water, waves, wind and sunlight. Among the above-mentioned energy sources, the technology of using wind energy has been greatly developed.

Wind is the speed of air mass produced by irregular heat caused by the sun on the surface of the earth. These differences result in the force pushing the air mass around to balance the force,global temperature, or in a smaller range, the temperature between or between land and sea mountain. The atmosphere warms when the sun warms the surface of the Earth, too. All year long, certain areas of the World receive direct rays from the sun and are still hot. Indirect rays are obtained in other areas, because the air is colder. Then cool air moves in and replaces the rising warm air, which weighs less than cold air. This air movement is what causes the wind to blow,

Wind energy is electric energy obtained by using wind through windmills or wind turbines. It continues to evolve and it gives energy out of sudden. 50 percent of the overall energy is emitted within 15 percent of the work time alone.

The wind intensity varies, so it is not possible to guarantee continuous strength. In the following cases , it is best to use a device with a significant amount of spare capacity (for example, hydropower).

The power extracted from the air can be calculated by the following formula:

PW=0.5ρπR3 Vw3 CP(λ,β)

Where;

Pw = extracted power from the wind,

ρ= air density, (approximately 1.2 kg/m3 at 20¤ C at sea level)

Vw = wind velocity (m/s) (velocity can be controlled between 3 to 30 m/s)

Cp = the power coefficient which is a function of both tip speed ratio (λ), and blade pitch angle, (β)(deg.) Power coefficient (Cp) is defined as the ratio between the output power generated and the power available in the wind.

According to a recent report by power-technology.com, China tops the chart with 221 gigawatt (GW) of installed wind capacity followed by the United States and Germany.energy.economictimes.indiatimes.com/news/renewable (accessed on 31/10/2020).

Now, 80% of the global wind energy market is concentrated in only four countries,this subsidiary reflects the failure of most other countries to adopt renewable energy policies. Future market growth will depend on whether other countries give way to the improved renewable energy in the power industry.

## Users of wind energy

Wind energy is a source of renewable energy, and for many reasons, we can use it. If you've ever wondered just what wind energy is for, then it's worth reading. We will tell you various ways of using kinetic energy from the air. Some of them are;

1. Wind power generation. Power generation is one of the most common applications of wind energy. Wind turbines use wind energy in this process. The generator turns on and then produces electricity as the wind starts to drive the blades of the turbine.
2. Production of food. Traditionally, for food processing, wind energy has been used. Windmills were commonly used to grind grains until the industrial revolution, so they could be used in the production of foods such as bread. Our need for such systems has been reduced with the advent of electricity and electric motors in recent years.
3. Used to pump water. You do not realise that you can also use wind energy via a wind pump to pump water. Similar to conventional windmills but now this air pumps are capable of pumping water.
4. helps in transportation. For thousands of years, humanity has used wind energy to sail. People claim that many years ago, there were sailing ships. We have seen small and large ships in recent years that can sail under the wind.
5. For sports and activities that rely on wind, a more friendly use of wind energy is. These are just some games using wind power: surfing, kiteboarding, sailing

So the above mentioned uses of wind energy are the most popular ones.

1. Instead of fossil fuels, using wind energy will reduce carbon emissions,which means that its environmental friendly.
2. The wind is a safe, limitless renewable energy device.
3. When the turbine is up and running,the maintenance expenses are minimal
4. Wind power is cost-effective and costs are still going down.
5. Without impacting the countryside, offshore wind farms may use offshore wind currents.

1. The habitats of birds and marine life may be destroyed by wind turbines which cause noice and aesthetic pollution
2. The visual appearance of the landscape is influenced by wind turbines.
3. Wind energy can be volatile since the amount of produced electricity depends on the speed and direction of the wind.
4. To construct wind farms it may be costy.

## Wind energy and the environment

Wind is a type of energy that is renewable. Overall, using wind to generate electricity has less environmental impacts than many other sources of energy. Wind turbines do not emit pollution that can contaminate the air or water and do not need cooling water. The amount of electricity produced by fossil fuels can also be reduced by wind turbines, resulting in lower overall air pollution and emissions of carbon dioxide.

Wind energy turbines has also some negative impacts to the environment. Modern wind turbines can be really big devices, and they can impact the landscape visually. A small number of wind turbines have also caught fire, and lubricating fluids have been leaked by others, but these events are uncommon. The sound that wind turbine blades make as they spin in the wind is not liked by some people. Bird and bat deaths are caused by certain kinds of wind turbines and wind projects. Such deaths could lead to declines in the population of species threatened by other human-related impacts as well.

29 April 2022

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