Micro-Hydroelectric systems convert the energy embodied in flowing water into electrical energy. Micro-hydroelectric systems are those that generate less than 20 kilowatts of electricity. These are small-scale systems with minimal environmental impact and can be implemented by private individuals and small companies. The amount of power available from a given site is determined using the following rule of thumb: Production (kW)= Head (in feet of drop) * Flow (in gallons per minute)/ 10.
In the right location, micro-hydro turbines can provide the most energy production for the money. Good micro-hydro sites are few and far between, and Old mill dams and steep creeks with waterfalls are ideal locations for micro-hydroelectric energy production. The system starts with a small dammed pool at the top, with a catchment basin directing a portion of the flow into a pipe which brings the water down to a small generator housing.
Micro-Hydroelectric Facilities Photo Alblum coming soon!
History of Hydropower
Humans have been harnessing 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.
For more than a century, the technology for using falling water to create hydroelectricity has existed. The evolution of the modern hydropower turbine began in the mid-1700s when a French hydraulic and military engineer, Bernard Forest de Bélidor wrote Architecture Hydraulique. In this four volume work, he described using a vertical-axis versus a horizontal-axis machine.
During the 1700s and 1800s, water turbine development continued. In 1880, a brush arc light dynamo driven by a water turbine was used to provide theatre and storefront lighting in Grand Rapids, Michigan; and in 1881, a brush dynamo connected to a turbine in a flour mill provided street lighting at Niagara Falls, New York. These two projects used direct-current technology.
Alternating current is used today. That breakthrough came when the electric generator was coupled to the turbine, which resulted in the world’s, and the United States’, first hydroelectric plant located in Appleton, Wisconsin, in 1882. (Read more about the Appleton hydroelectric power plant on the Library of Congress web page.)
|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.|