Electricity is produced from various energy sources in different types of power plants. Conventional power plants, like thermal and nuclear plants, rely on burning fossil fuels or nuclear fission, which negatively impacts the environment through resource depletion and pollution. Non-conventional renewable power plants, including solar, wind, geothermal and biomass, produce electricity without these environmental issues and are growing in use.
2. Index
● 1 Energy sources.
-1.1 Electricity
● 2 Electric powers plants.
-2.1 Conventional power plants.
-2.2 Non-conventional power plants.
● 3 Environmental impact.
3. 1 Energy sources
● Energy sources are natural resources from
which different forms of energy are obtained.
4. ● We can clasify energy sources in several ways:
-by availity in nature: renewable or non-
renewable.
-by origin:primary or secundari.
-by use: conventional or mom-conventional.
-by enviroment impact: clear or polluting.
5. 1.1 Electricity
Electricity is the most widely used form of
energy in industrialised societies for two
seasons:
● Its capacity to be easily transformed into other
forms of energy.
● The possibility of transporting it long distances
at a low cost.
6. 2 Electricity power plants
● Electrical power plants use an external source of
energy produce electricity. To do this, they rely
on a turbine-alternador system.
● The turbine: converts ● The alternador is
mechanical energy connected to the
into the rotating turbine shaft. As the
movement of a shat. shaft moves, it
produces alternating
electrical current
7. 2.1 Conventional power plants
● The thermal power The stean that is
plants, water is generated moves the
heated in a bolier by turbine connected to
the heat generated the generator.
from the combustion
of a fossil fuel.
8. ● Combined cycle power plants obtain electricity
as the result of two combined cycle: that uses
air and gas, and a conventional thermal cycle.
During the first cycle, a gas turbin is used that
incloudes a compresor.
The combustion
gases from the first
cycle are transporte
to another boiler,
where they transfer
their energy.
9. ● Nuclear power plants used a nuclear fission
reactor that produce heat to generate the
pressurised stean needed to moved the turbine
rotor.
10. ● Hydroelectric power plants use the potential
energy provided by the height of the water
stored in a dam, converting in into kinetic
energy. This energy moves the blades of the
turbin. There are two tipes: gravity and pump.
11. 2.2 Non-conventional power plants
● The enviromental problems caused by
conventional power plants have led to the
creation and development of non-conventional
or alternative energy power plants.
● Wind farms use the
kinetic energy of the
wind to move the
blades of a rotor at
the top of a tower;
this is referred to as a
wind turbine.
12. ● Solar power plants use the
Sun's energy. There are two
types: Photo thermal power
plants and Photovoltaic power
plants.
● Geothermal power plants use
the heat found at deep layers in
the Earth.
● Biomass consists of all organic
compounds that are produced
through natural processes.
13. 3 environmental impact
The exploitation of fossil fuels and nuclear
energy leads to the depletion of resources.
Furthermore, fuel extraction processes are
sometimes harmful to the environment
Petroleum is transported by means of oil
pipelines and oil tankers both can have
accidents which means the risk of a spill.
