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.
1 Energy sources● Household uses : ● Industrial uses: the operating household operation of factories and appliances, heating businesses, construction, systems etc etc
Energy sources are natural resourcesfrom which different forms of energy are obtained
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
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
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.
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.
● 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.
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 Suns● 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.
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.