POWER STATIONS THAT USE RENEWABLE ENERGY SOURCES
There are many types of power stations that use renewable sources, such us: wind power, hydroelectric power, solar power, marine power, geothermal power and biomass power.
Some advantages of these types of power stations:
-They are greener than conventional power stations
-They don´t consume limited natural resources
-They reduce our dependence to use fossil fuels

WIND FARMS
They are a totally clean source of electricity. Wind farms use the kinetic energy of the wind to produce energy. The wind turns the blades of a turbine, and the blades are connected to a gearbox.

HYDROELECTRIC POWER STATIONS
They use the energy of falling water to produce energy. There are two types of hydroelectric stations:

-Conventional hydroelectric stations: here, the water flows from the reservoir to the turbines through a high preasure conduit. Then it flows out, usually into a river.

-Pumped-storage hydroelectric stations: here, the water flows from the turbines to a second reservoir. Then it is pumped back up to a higher reservoir and stored for later.

SOLAR POWER STATIONS
They use energy from sunlight to generate electricity. There are two types of solar power stations:

Solar thermal stations
They can use sunlight in two ways:
-With solar collectors that absorb sunlight to produce heat
-With mirrors called heliostats, that reflects and concentrate sunlight in one place.

Photovoltaic stations
Here, solar panels convert sunlight directly into electricity. Each panels contains many photovoltaic cells.

BIOMASS POWER STATIONS
Biomass is any organic material that is produced by natural processes.
In a biomass power station, the fuel used to produce energy comes from biomass. The steam from burning the biomass moves a turbine connected to a gerenator (alternator)

MARINE POWER STATIONS
They use the movement of ocean water te generate electricity. They are very expensive and not vere efficient. There are three types of marine power stations:
-Tidal power stations
-Wave power stations
-Ocean thermal conversion stations

GEOTHERMAL POWER STATIONS
They use heat from the deepest underground layers of our planet. This energy can be used in two ways:
- Directly, to provide hot water for heating and industrial uses.
-Indirectly: to drive generators to produce electricity.