Electricity Generation Essay
2121 Words9 Pages
Electricity is a secondary form of energy, the primary being fossil fuels, which are used to generate it. The world’s production of electricity was twelve trillion kilowatt hours in 1997, and is expected to be close to twenty-one trillion kilowatt hours by 2020. (Fay and Golomb, 2002, 16) This is a cause of concern because based on the United States Department of Energy’s International Energy Outlook 1997 the world’s electricity generation is primarily (63%) from fossil fuels, which release large amounts of carbon dioxide into the atmosphere when burned. The unnatural amount of carbon dioxide in the atmosphere is already beginning to make some changes in our weather patterns, and predictions for the future look grim. Therefore,…show more content…
(Urone, 2001, 479) The generation of an electric current is done using Michael Faraday’s discovery of electromagnetic induction. This method includes magnets, copper wire (conductor), and motion as the key components to electric current generation. Based on Michael Faraday’s discovery, the movement of a magnetic field relative to a conductor, or the movement of a conductor relative to a magnetic field will induce a current in the conductor. Fossil fuels, nuclear, hydro, and wind all serve the same purpose of creating the motion needed in the electricity generation process.
In the case of wind power, the force from the wind spins the arms of a windmill creating the motion needed to generate electricity. This type of energy source is termed renewable because it can furnish energy for all time within our consideration. (Ristinen and Kraushaar, 1999, 90) The wind currents are generated by solar energy from the sun that warms the air. The movement of denser cold air toward the ground, and warmer air upward creates the wind currents needed to drive the windmill, generating electricity. (Ristinen and Kraushaar, 1999, 133) An analysis of windmill performance shows that no more than 59% of the kinetic energy of the wind is recoverable as mechanical energy. Therefore, modern windmills can attain an efficiency of perhaps 50 to 70% of the theoretical maximum. (Ristinen and Kraushaar, 1999, 135)
Electricity is one of the most important blessings that science has given to mankind. It has also become a part of modern life and one cannot think of a world without it. Electricity has many uses in our day to day life. It is used for lighting rooms, working fans and domestic appliances like using electric stoves, A/C and more. All these provide comfort to people. In factories, large machines are worked with the help of electricity. Essential items like food, cloth, paper and many other things are the product of electricity.
Modern means of transportation and communication have been revolutionised by it. Electric trains and battery cars are quick means of travel. Electricity also provides means of amusement, radio, television and cinema, which are the most popular forms of entertainment are the result of electricity. Modern equipment like computers and robots have also been developed because of electricity. Electricity plays a pivotal role in the fields of medicines and surgery too — such as X-ray, ECG. The use of electricity is increasing day by day.
Lekshmi S. is a Std X D student at V.H.H.G.S.S., Pattathanam