Coal v gashi 2012


Watch the 3-D animation from First Energy, an electricity generating power company to find out. It will provide you with an overview of the process of converting coal into electricity, the environmental clean up of by-products produced in the combustion of the coal, and how the electricity is transmitted for use. According to the EIA (U.S. electricity production in china Energy Information Administration), coal is the resource that accounts for the largest percentage in electricity generation world-wide.

In 2010 coal was responsible for about 44.9% of the electricity generated in the United States. Natural Gas was a distant second with 23.8% while conventional hydroelectric generation, a primary resource in the Pacific Northwest, came in 4th with a 6.2% share. In 2010 the EIA projected that the role of coal will not diminish significantly through 2035. year 6 electricity However, the EIA data for 2016 shows that electricity generation using natural gas increases to abou 33% and coal dropped to 32% in the U.S.

Although there are a number of different designs for coal-fired powerplants, all use the heat produced in the combustion reaction to heat water to steam. The gaseous flowing steam pushes the blades of a turbine (similar to how wind would move the blades) which turns the shaft of a generator producing the electricity. This simple demonstration shows how steam pushes the blades of a turbine:

This vintage 1920s silent film (originally a 16mm hand-cranked movie) shows a typical day of producing coal in a northeastern Pennsylvania anthracite coal mine. The film begins with the miners arriving at the mine and switching into mining clothes with their street clothes held up by lines near the ceiling. e suvidha electricity bill lucknow Each miner receives a head lamp and is issued a case of dynamite. Before entering the mine the miner updates the peg board taking the token that allows the mine operator to know exactly who is in the mine at any given time. year 6 electricity worksheets In the shaft the miners drill a hole in the face of the coal seam, pack it with the explosives and blast a section of the coal face. The miner and his helper shovel the coal into a cart for movement to the main gangway where the coal is transferred into larger carts which are hauled away by mules. In addition to the mule drivers and "spraggers" the film shows the coal breaker in the tipple where boys and disabled men separate the slate from the coal. The culm (waste rock) is transported and dumped formime giant piles. electricity transmission efficiency Finally the coal is washed and sorted into various sizes: stove, egg, nut and shipped out in railroad cars .

Although coal is still mined in underground mines, surface mining has become an increasingly important method of extracting coal. j gastroenterol hepatol For example, the Powder River Basin of Wyoming contains seams of coal that are not co-mixed with rock debris and can be 100 or more feet thick. The coal from the Powder River Basin has another very desirable feature; it has a very low sulfur content which makes it a cleaner electricity generating energy source than coal from many other areas. When coal is combusted (burned), sulfur contaminants are also oxidized into sulfur dioxide which, if not removed, can combine with water to form the sulfuric acid which can result in increasing the acidity of rain. Exactly how these unusually "pure" coal deposits were formed remains a bit of a geologic mystery.

These coal beds lie very close to the surface and can be accessed by blasting the surface rock (called overburden) and then collected by huge mechanized shovels that deposit the pure coal into huge trucks. These trucks transport the coal from the bed to railroad cars that take it to coal fired powerplants all across the United States. This short video shows how this Powder River Basin coal is mined:

Perhaps the most controversial current method of mining coal is a process referred to as "mountain-top removal". This is a process by which coal seams in the Appalachian Mountains of the eastern United States are accessed by blasting away the the tops of mountains to expose the seams rather than burrowing to the mountain with shafts. A battle is raging between environmentalists, miners, the local population and the mining companies. The following video is an except from the award-winning documentary "The Appalachians" by Mari-Lynn Evans and Phylis Geller which explains the process of mountain-top removal.

It is interesting to see how mountain-top removal has changed the face of the Appalachian landscape. Follow the links to do a virtual fly-over of mountain-top removal sites in Wise County of western Virginia; view the time-lapse evolution of the Hobet Coal Mine in Boone County West Virginia from 1984 to 2009 via images acquired by NASA’s Landsat 5 satellite and compiled by National Geographic.

Coal is king when it comes to electricity production. gas bloating back pain According to the Energy Information Agency (EIA), coal provided 44.9% of the electricity generated in the United States in 2010. Natural Gas was a distant second with 23.8% while conventional hydroelectric generation is a primary resource in the Pacific Northwest, it comes in 4th with a 6.2% share.