Difference between revisions of "Hydroelectric power 2014"
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Revision as of 10:07, 30 September 2014
Hydroelectric power must be one of the oldest methods of producing power. No doubt, Jack the Caveman stuck some sturdy leaves on a pole and put it in a moving stream. The water would spin the pole that crushed grain to make their delicious, low-fat prehistoric bran muffins. People have used moving water to help them in their work throughout history, and modern people make great use of moving water to produce electricity.
water to perform work for thousands of years. The Greeks used water wheels for grinding wheat into flour more than 2,000 years ago. Besides grinding flour, the power of the water was used to saw wood and power textile mills and manufacturing plants.
B.C. Hydropower used by the Greeks to turn water wheels for grinding wheat into flour, more than 2,000 years ago. Mid-1770s French hydraulic and military engineer Bernard Forest de Bélidor wrote Architecture Hydraulique, a four-volume work describing vertical- and horizontal-axis machines. 1775 U.S. Army Corps of Engineers founded, with establishment of Chief Engineer for the Continental Army. 1880 Michigan's Grand Rapids Electric Light and Power Company, generating electricity by dynamo belted to a water turbine at the Wolverine Chair Factory, lit up 16 brush-arc lamps. 1881 Niagara Falls city street lamps powered by hydropower. 1882 World's first hydroelectric power plant began operation on the Fox River in Appleton, Wisconsin. 1886 About 45 water-powered electric plants in the U.S. and Canada. 1887 San Bernardino, Ca., opens first hydroelectric plant in the west. 1889 Two hundred electric plants in the U.S. use waterpower for some or all generation. 1901 First Federal Water Power Act. 1902 Bureau of Reclamation established. 1907 Hydropower provided 15% of U.S. electrical generation. 1920 Hydropower provided 25% of U.S. electrical generation. Federal Power Act establishes Federal Power Commission authority to issue licenses for hydro development on public lands. 1933 Tennessee Valley Authority established. 1935 Federal Power Commission authority extended to all hydroelectric projects built by utilities engaged in interstate commerce. 1937 Bonneville Dam, first Federal dam, begins operation on the Columbia River. Bonneville Power Administration established. 1940 Hydropower provided 40% of electrical generation. Conventional capacity tripled in United States since 1920. 1980 Conventional capacity nearly tripled in United States since 1940. Today About 6–8% of U.S. electricity comes from hydropower.
Hydroelectric power is an extremely flexible technology to generate power. The basic principe of hydropower is that if water can be piped from a certain level to a lower level, then the resulting water pressure can be used to do work. If the water pressure is allowed to move a kind of dynamo then that movement makes power out of the energy of the water. It then can be used to drive an electricity generator, a grinding mill or some other useful things.
the energy is mostly waked up by falling water. How does it work?
Typical hydroelectric powerplant water stored in the dam. go´s down . the turbine starts spinning. power . transformer (power – machinical energy). power go´s to power lines.
intoduction: Our group is going to talk about hydroelectic power. Hydroelectricity means getting energy from flowing or falling water. We´re going to give some main information like: - how it works - where you can find ´plants´ (factory´s)? - can it be used in the Netherlands/Spain? - advantages + disadvantages A dam is built to trap water, usually in a valley where there is an existing lake. Water is allowed to flow through tunnels in the dam, to turn turbines(which look a little like an ammonite shell: a wheel with bucket-shaped blades around the rim. Water "blows" them round, and they drive generators in hydro-electric power stations). Notice that the dam is much thicker at the bottom then the top, because the water pressure increases how deeper you go down. Hydroelectric power stations can produce a great deal of power very cheaply.