hydroelectric Power

P from a dam is given by P ghQ Where. The United Kingdom and South Africa. Impulse turbines which are only partially submerged are more commonly employed in fast flowing run-of-river installations while In deeper, slower flowing rivers with a greater head of water, fully submerged Kaplan reaction turbines may be used to extract the energy from the water flow. As such, their energy output may be inconsistent depending on the water flow rate of any river at any given time. There are no inefficient intermediate thermodynamic or chemical processes and no heat losses. For water flowing at one cubic metre per second from a head of one metre, the power generated is equivalent to 10 kW assuming an energy conversion efficiency of 100 or just over 9 kW with a turbine efficiency of between 90 and. As such, it is much more useful to separate solutions by type and geographic location than to suggest an all-around solution to fit some global mold. Decc, there is no national strategy for nationwide development of hydroelectric power, but the government is committed to do everything in its power to support developers, community initiatives and small scale developers being able to invest and build hydro projects.

Hydroelectric power, definition Facts
Hydroelectricity and, hydroelectric, power, generation
Hydroelectric, power : How it works, usgs Water-Science School
Largest hydroelectric power stations - New World Encyclopedia
Hydroelectric, power - TheGreenAge

The diagram opposite shows a typical turbine and generator configuration as used in a dam. In the last decade, 20 of the worlds electricity came from hydroelectric plants (88 of the renewable energy supply). Tidal plants require differences of at least 7m between high and low tide for any practical use and underground power stations are only feasible where there are two bodies of water of different elevations with enough stable rock to be drilled into for the installation. Alternatively high-pressure water can be pumped ashore to power shore based generators. Advancements in turbine and damming technology have also attempted to lower their overall effect on local wildlife, making both more environmentally-conscious than the conventional reservoir-type dams. Housing and mooring the equipment Substantial housings must be provided to protect the Venus of Willendorf the generating equipment from the harsh environment. Water flow is also allowed to continue downstream as normal upon exiting the penstock pipes instead of being collected in reservoirs, further reducing the effects of run-of-river turbines on downstream aquatic life and ecosystems. Newer, more efficient turbines also increase both the overall energy production of existing dams at a fraction of the cost of new dam construction and allow for higher wildlife survival rates through the turbines more eco-friendly turbines such as Voith Hydros Alden Turbines have purportedly.

Hydroelectric power : Hydroelectric power, electricity produced from generators driven by turbines that convert the potential energy of moving water into mechanical energy.
Hydroelectricity and Hydroelectric Power.
Hydroelectricity is the generalised term used to describe electricity that has been generated using water, hence the term hydro.
Take a look at this diagram (courtesy of the Tennessee Valley Authority) of a hydroelectric power plant to see the details.
Hydroelectric Power: An Overview.