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How Hydropower Works

Hydropower is using water to power machinery or make electricity. Water constantly moves through a vast global cycle, evaporating from lakes and oceans, forming clouds, precipitating as rain or snow, then flowing back down to the ocean. The energy of this water cycle, which is driven by the sun, can be tapped to produce electricity or for mechanical tasks like grinding grain. Hydropower uses a fuel—water—that is not reduced or used up in the process. Because the water cycle is an endless, constantly recharging system, hydropower is considered a renewable energy.

When flowing water is captured and turned into electricity, it is called hydroelectric power or hydropower. There are several types of hydroelectric facilities; they are all powered by the kinetic energy of flowing water as it moves downstream. Turbines and generators convert the energy into electricity, which is then fed into the electrical grid to be used in homes, businesses, and by industry.

Source : http://www1.eere.energy.gov/windandhydro/hydro_how.html

Hydropower as an Energy Platform

Science article brought to you by Richard Monk

Much like solar and wind power, hydropower has been a constant energy source for man. Following is an overview of hydropower.

Hydropower As An Energy Platform

Hydropower can be defined simply as using the energy of flowing water to generate power. With early man, this power was experienced in the form of propulsion as in moving wheels to grind food materials. With modern man, hydropower is used to turn turbines that produce electricity. In cases such as the Three Gorges Dam in China, this platform can be the basis of providing huge amounts of energy to countries in need.

Let’s take a look at an overview of developments in hydropower:

Over 2,000 years ago, hydropower was used by the Greeks to turn grinding wheels to turn wheat into flour.

In the 1770s, French engineer Bernard Forest de Bélidor wrote Architecture Hydraulique, a four-volume series detailing mechanisms that could be used to convert flowing water into power.

1880 - Michigan's Grand Rapids Electric Light and Power Company showcased the first commercial application for electricity generated from hydropower. The company used a turbine to provide power to a whopping 16 lamps at the Wolverine Chair Factory.

1881 - Niagara Falls votes to convert all lamps on streets to electricity provided by hydropower, which made sense considering their location.

1882 – The first power plant devoted entirely to hydropower electricity production goes online in Wisconsin. The power is produced from water in the Fox River.

1886 – Hydropower plants are so popular that over 40 are functioning in Canada and the U.S.

1889 – Only three years later, the number of hydropower plants in the two countries grows to 200.

1907 – Hydro plants produce 15 percent of the electrical power needs of the United States.

1920 – Hydro plants produce 25 percent of the electrical power needs of the United States.

1933 – Hydropower comes to the forefront with the establishment of the Tennessee Valley Authority.

1940 – Hydro plants provide a whopping forty percent of all electricity produced in the United States.

2003 – At the turn of the century, hydropower has lost much of its allure. Population growth results in power needs so high that hydropower is not viewed as a solution. Environmental issues also cause a slow down. Only ten percent of the electricity in the U.S. is produced by hydropower.

Today, roughly twenty percent of all the electricity in the world is produced through hydroelectric power plants. The largest producer of electricity through hydropower is Canada followed by the United States, Russia, Brazil and China. Egypt is highly dependent on hydropower via the Nasser Dam. Norway produces nearly all of its electricity needs through hydropower. In many other countries, hydropower is being looked to as the solution for growing energy needs.

Hydropower has definite downsides. It can be unreliable in countries that suffer droughts, as many African nations have learned. The environmental impact of large dams, as seen with the three gorges dam in China, is also a concern. Notwithstanding these concerns, hydropower is a proven renewable energy platform that certainly is better than fossil fuel alternatives.

This Science article is provided by Articleteller - The Free Article Directory http://www.articleteller.com

Richard Monk is with FactsMonk.com - a site with facts about everything. Visit us to read more about energy facts.