2. INDICE
● 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
● Household uses : ● Industrial uses: the
operating household operation of factories and
appliances, heating businesses, construction,
systems etc etc
4. Energy sources are natural resources
from which different forms of energy are
obtained
5. We can classify energy sources in several ways:
● By availability in nature : ● By origin: primary or secondary
renewable or non-renewable
● By use: conventional or non- ● By environmental impact: clean
conventional or polluting
6. 1.1 Electricity
● Electricity is the most widely used form of
energy in industrialised societies for two
reasons
● Its capacity to be easily ● The possibility of
transformed into other transporting it long
forms of energy distances at a low cost
7. Electric power plants
● Electrical power plants use an external source
of energy to producte electricity.To do this, they
rely on a turbine-alternator system.
● The turbine converts ● The alternator is connected to
mechanical energy into the the turbine shaft. As the shaft
rotating movement of a shaft. moves,it produces alternating
electrical current.
8. 2.Conventional power plants
2.1.Conventional power plants
● Intermal power plants, water is ● Combined cycle power plants
heated in a boiler by the heat obtain electricity as the result of
generated from the combustion two combined cycles:a cycle
of a fossil fuel.(natural gas...) that uses air and gas, and a
convetional thermal cycle.
9. ● Nuclear power plants ● Hydroelectris power
use a nuclear fission plants use the potential
reactor that productes energy provieded by the
heat to generate the height of the water
pressurised stem stored in a dam,
needed to nove the converting it into kinetic
turbine rotor energy.
10. 2.2. Non-conventional power plants
● The envioronmental problems caused by convetional power plants
have led to the creation and development of non-conventional or
alternative energy power plants
● Solar power plants use the Sun's
● Wind farms use the kinectic energy energy. There are two types: Photo
of the wind to move the blades of a thermal power plants and
rotor at the top of a tower; this is Photovoltaic power plants.
referred to as a wind turbine
● Geothermal power plants use the
● Biomass consists of all organic heat found at deep layers in the
compounds that are produced Earth.
through natural processes.
11. 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.
● Conventional thermal power plants produce air
pollution which increases greenhouse effec.
● Nuclear power plants are accomponied by the
risk of a nuclear accident and nuclear waste.
