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Saturday, 25 June 2011

Modern usage

Modern usage

There are several forms of water power currently in use or development. Some are purely mechanical but many primarily generate electricity. Broad categories include:

Hydroelectricity

A conventional dammed-hydro facility (hydroelectric dam) is the most common type of hydroelectric power generation.
  • Conventional hydroelectric, referring to hydroelectric dams.
  • Run-of-the-river hydroelectricity, which captures the kinetic energy in rivers or streams, without the use of dams.
  • Pumped-storage hydroelectricity, to pump up water, and use its head to generate in times of demand.
  • Tidal power, which captures energy from the tides in horizontal direction.
    • Tidal stream power, usage of stream generators, somewhat similar to that of a wind turbine.
    • Tidal barrage power, usage of a tidal dam.
    • Dynamic tidal power, utilizing large areas to generate head.

Marine energy

A Pelamis wave device under test at the European Marine Energy Centre (EMEC), Orkney, Scotland.
  • Marine current power, which captures the kinetic energy from marine currents.
  • Osmotic power, which channels river water into a container separated from sea water by a semi-permeable membrane.
  • Ocean thermal energy, which exploits the temperature difference between deep and shallow waters.
  • Tidal power, which captures energy from the tides in horizontal direction. Also a popular form of hydroelectric power generation.
    • Tidal stream power, usage of stream generators, somewhat similar to that of a wind turbine.
    • Tidal barrage power, usage of a tidal dam.
    • Dynamic tidal power, utilizing large areas to generate head.
  • Wave power, the use ocean surface waves to generate power.

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