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Geothermal Energy Essay

1259 words - 5 pages

Throughout the years electricity has become a source of energy that cannot seem to be replaced; however there are many different alternatives to this source of energy. One specific alternative is geothermal energy, which might be just as effective as electricity, but much less harmful to the environment. Electricity, although very helpful, produces fuels that might be harming not only our world, but our human society. To power electricity we must use fossil fuels such as coal, oil, and natural gas. An electrical current is produced because of the attraction between the protons and the electrons. As the electron moves around the atom’s nucleus it forms an electrical current. Electricity is powered by the fossil fuels that are non-renewable, so therefore they are very limited. They also produce carbon dioxide, which is affecting our air pollution, according to BBC news, coal and oil produce sulfur dioxide that might lead to acid rain. Therefore, geothermal energy is a great alternative because it does not produce as much pollution as electricity does; this is according to the article Advantages of Geothermal Energy, from Conserve Energy Future.
According to the Union of Concerned Scientists, the geothermal energy is obtained from the world’s center core. This source has been used throughout the world, and has helped reduce the usage of fossil fuels. Geothermal energy is renewable because the heat in the earth is constantly being produced; however, if the energy is converted into a solid, it can no longer be used. Geothermal energy is captured from the center of the earth. As the heat flows to the surface, it is converted into steam and hot water. There are three types of geothermal power plants: dry steam, flash steam, and binary cycle. In the dry steam, the steam goes through the turbine, and then is passed to a condenser where is steam is converted to water. In the flash steam approach, very hot water is used to power the turbines, it is collected in a tank in which the pressure is lowered enough to cause the liquid to form to steam. The third approach, binary steam, uses very high temperatures to heat another fluid, and then this fluid is transformed into steam, and begins to power the turbines. And the cycle converts the steam back to a fluid starting once again.

In comparison to the usage of electricity, geothermal energy is renewable, does not pollute the air as much as electricity, no additional sources of fuel are needed to keep the power running, and once a power station is created it is very effective and not as expensive. The earth has been producing heat for billions of years and it seems as if it will keep producing many more to come. Some disadvantages are that a power plant can only be placed in a certain place, and in some cases the site where the station was built might run out of heat to convert to steam. Dangerous gases might escape from the earth’s center when making these power stations. In the other hand, electricity is...

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