Hydro Power

Although waste from an operating hydroelectric power system is minimal it does exist. The water flowing to the turbines often has a screen upstream of the turbines to remove debris from the water that could damage the turbine blades. Collected debris must be removes and disposed of in a proper fashion.

Hydroelectric power plants generate electricity by the action of the "falling" water spinning a turbine which rotates a wire inside a big magnet.

It is the transfer of mechanical/physical energy to electrical energy. The flowing water rotates a turbine which is attached to a generator and in turn creates an AC field.

Dams store water for agriculture, as well as generating electricity through hydro power. This is renewable energy with no carbon dioxide emissions to cause global warming. Recent studies show, however, that some dams release methane from the depths behind the dam. Methane is a much more dangerous greenhouse gas, so this is not good news!

Chimneys in power stations use electrostatic precipitator to attract soot particles. Electrostatic precipitator are filtration devices that use electromagnetic charges to remove particles from gases.

In 2006, it was 59% of the total generated. It is likely still above 50%. This is the highest percentage among developed countries, and the second highest amount of hydro power (after China).

It depends. A hydroelectric power installation at a pre-existing dam (it's called retrofitting) generally has a relatively small effect on the surroundings, and very little effect on the river or stream that supplies it with water. However, a hydropower project that includes a new dam and reservoir will have a considerable impact on the stream, as well as on the surrounding area.

It is slang for marijuana which the seller claims to be a cross breed of cannabis sativa and cannabis indica grown in an artificial hydroponic environment.

Pro:

Makes barely any pollution compare to other ways of creating electricity

Hydroelectric power is one of the most responsive (easy to start and stop) of any electric power generating source.

The conversion of the forces of water to electric energy can be up to 90 percent efficient.

Hydroelectric power produces no chemical or waste heat pollution.

Hydroelectric power plants require little maintenance.

Reservoir lakes can be used for recreation, and can provide considerable flood protection to downstream areas.

Groundwater reserves are increased by recharging from reservoirs.

Plants usually have an expected life span two to three times longer than conventional thermal power plants.

Hydroelectric installations can be used to breed fish and other acquatic products.

Con:

Construction costs of large-scale hydroelectric projects are high.

Damming rivers causes changes in ecological cycles and surrounding landscapes; self-regulating ecosystems are changed into ones that must be managed.

Sedimentation can progressively curtail a dam's ability to store water and generate energy.

There are a limited number of feasible sites for large dams.

Damming can cause loss of land suitable for agriculture and recreation.

Drought can affect power production.

Dams are vulnerable to natural forces. There is a high direct death rate from the failure of dams.

River channels downstream from dams are more susceptible to erosion.

Paigara

Hydropower is the cheapest way to generate electricity today. No other energy source, renewable or nonrenewable, can match it. Producing electricity from hydropower is cheap because, once a dam has been built and the equipment installed, the energy source-flowing water-is free.

Although Hydropower does present a few environmental problems the inherent technical, economic and environmental benefits of hydroelectric power make it an important contributor to the future world energy mix,

• wind power
• solar power

how do you havest hydro?

Hydro power depends on suitable water sources and terrain where you can build a dam to obtain the necessary head of water, so it can't be built anywhere, whereas a nuclear plant can be sited in most areas apart from earthquake zones, provided there is a supply of cooling water. So hydro is more limited in application, but I guess if there are the right conditions for building it, this will be the most economical in the long run, and there are no pollution worries. Nuclear plants should be compared with fossil fuel plants rather than hydro, as the choice is then more valid.

Hydro power is expensive up front in a large scale but eventually pays for itself. This is particularly true with hydroelectric dams which power large areas.

The water builds up behind the dam. This may destroy animal habitats and even people's homes, farms and livelihoods.

to run one hydroelectric power plant it needs about 1000000000000000000000000000000000000000000000000000000000212212200

people to run it.

A biofuel is any explosive liquid used to power vehicles that is produced from plant matter. This plant matter is usually referred to as Biomass, and biofuels are often looked to as a future replacement for petroleum fuels.

Although 1st generation biofuels could only process corn starch to make ethanol, it has received quite a bad reputation, especially considering it takes more energy and carbon to produce the ethanol than the ethanol itself is worth.

New, advanced biofuels can be produced using the entire plant, of any type or source, to make fuel identical to gasoline today.

Other liquid biofuels can be produced to make biodiesel, a renewable fuel for diesel engines. It is normally made from soybean oil, but can be made from any oil-producing crop.

The word "biofuels" in its literal sense can also include the use of biomass to be directly burned for its heat content. Some US power plants are using pelleted switchgrass, for example, to replace up to 20% of the coal they normally burn for power generation. The use of biogases is also on the rise, with some US dairies using manure digesters to produce methane for power generation.

Turbines don't produce energy. They convert combustion from burning gas or water flow. A turbine is just a device with a lot of blades that convert water flow or gas flow to rotation. This rotation then turns an electrical generator, interfaces with a power take off unit, or provides jet thrust.

it is 4000000000000 years

i am not absolutly positive

yes

False, in fact hydroelectric is one of the cheapest form of energy available.

the only possible expensive part if it is building the dam or whatever else the build

http://wiki.answers.com/Q/What_are_the_requirements_to_build_a_hydroelectric_power_plant" http://wiki.answers.com/Q/What_are_the_requirements_to_build_a_hydroelectric_power_plant"