*

Nowadays, the environment is very

important in every country. Obtaining

energy from flowing water is one of the

renewable energy sources and its impact on

the environment is much smaller than, for

example power plants that burn coal, oil or

gas. A number of so-called emerging

hydroelectric power plants that are located

on the river and use flowing water to

generate electricity is bigger and bigger

The principles of the operation of the

power plants:

Water affects the turbine blades and drives it, that sets in

motion, and drives a generator, producing electricity.

Then the water is discharged back into the river bed and

continues the established electric energy is transferred to

the power network

-Thermal Power Plants - Nuclear Power Plants

-Hydropower Plants -Unconventional Power

The largest hydroelectric plants in the world

The Three Gorges Hydropower ( China ) :

The Itaipu Hydropower ( Brazil , Paraguay )

Dams - required build dams on the rivers

Problems caused by the dam :

When a dam is constructed, the destruction

of the environment is highly visible. The

problems caused by the dam

-Increase flood risk

-Hamper navigation

-Lower groundwater tables

-Cause an accumulation of toxic materials

-Affect entire ecosystems

Pumped-storage - involves draining the second tank located at a high altitude

Cross section of pumped-storage power plant

Run of the river - do not pile up water and do not require the

creation of inundations. Their power is limited by the power

of flowing water

Cross section of Run-of-the-river hydroelectricity

Tidal power plants

How do they work ?

The regularly repeated rise and fall of the water

level in the ocean is called the tidal

phenomenon, which is caused by the

gravitational forces of the Moon and the Sun. It

is the new way of producing energy.

Also called tidal energy, is a form of hydropower

that converts the energy of tides into useful

forms of power, mainly electricity.

Where can we find it ?

France has opened the world's first tidal power in

November in 1966 .

Wave power The first wave power station was established in the United States. But

attached permanently subjected to movements of the waves, so that

placed in the middle of the float rises and falls by moving the piston.

This rotates the generator and so electricity is sent to shore underwater

cable.

FIRST TYPE

SECOND TYPE

GeothermalGeothermal energy uses the heat stored in the Earth to

generate electricity and heat, producing one of the most

reliable and constantly available sources of renewable

power.

Nuclear power plant

Water is needed to cool the reactor

*