Micro Hydro Power

In: English and Literature

Submitted By nirajamr
Words 3176
Pages 13
Water power can be harnessed in many ways; tidal flows can be utilised to produce power by building a barrage across an estuary and releasing water in a controlled manner through a turbine; large dams hold water which can be used to provide large quantities of electricity; wave power is also harnessed in various ways. It is a technology that has been utilised throughout the world, by a diverse range of societies and cultures, for many centuries. Water can be harnessed on a large or a small scale - Table 1, below outlines the categories used to define the power output form hydropower. Micro-hydro power is the small-scale harnessing of energy from falling water; for example, harnessing enough water from a local river to power a small factory or village. This fact sheet will concentrate mainly at micro-hydro power. Large- hydro Medium-hydro Small-hydro Mini-hydro Micro-hydro More than 100 MW and usually feeding into a large electricity grid 15 - 100 MW - usually feeding a grid 1 - 15 MW - usually feeding into a grid Above 100 kW, but below 1 MW; either stand alone schemes or more often feeding into the grid From 5kW up to 100 kW; usually provided power for a small community or rural industry in remote areas away from the grid.

Pico-hydro From a few hundred watts up to 5kW Table 1: Classification of hydropower by size. kW (kilowatt) - 1000 Watts; MW (megawatt) - 1 000 000 Watts or 1000 kW In the UK, water mills are known to have been in use 900 years ago. Their numbers grew steadily and by the 19th century, there were over 20,000 in operation in England alone. In Europe, Asia and parts of Africa, water wheels were used to drive a variety of industrial machinery, such as mills and pumps. The first effective water turbines appeared in the mid 19th century and it was not long before they were replacing water wheels in many applications.…...

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