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Energy ans its transformations
 

Energy ans its transformations

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    Energy ans its transformations Energy ans its transformations Presentation Transcript

    • Ene rg y and its transfo rmatio n● ENERGY SOURCES *Household uses :operating household appliances, heating systems, means of transfort, etc. *Industrial uses: the operation of factories and businesses, construction, agricultura, etc. *by avaavailabity in nature : renewable or non -renewale. *By origin: primary or secondary. *By use: Conventional or non-conventional. *By environmental impact: Clean or polluting.
    • 1.1 Electricity.*its capacity to be easily transformed into otherforms of energy*the possibility of transporting it long distances atlow cost
    • Electric power plants● The turbine converts mechanical energy into the rotating movement of a shaft *The alternador is connected to the turbine shaft. As the shaft moves, it produces alternating electrical current
    • 2 electric power plants● 2.1. in thermal power plants water is heated in a boiler by the heat generated from the combustion of a fossil fuel (natural gas,coal or petroleum) *Combined cycle power plants obtain electricy as the result of two combined cycles: a cycle that uses air and gas, and conventional thermal cyle.
    • 2.1 Conventional poewer plamts● Nuclear power plants use nuclear fission reactor that productes heat to generate the pressurised steam needed to move the turbine rotor. *Hydroelectric power plants use the potential energy providedby the height of the water stored in a dam, converting in into kinetic energy.
    • 2.2 Non-conventional 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 referred to as wind turbine
    • 2.2 Non-conventional power plants● Solar power plants use the suns energy .there are two types photo -thermal power plants are thermal power plants in which steam is produced by solar radiation,while photovoltaic power plants transfor solar radiatio directly into electricity uisng panels of photovoltais cells.
    • 2.2.● Biomass consist of all organic compounds that are produced through natural processes.
    • 2.2.● Geothermal power plants use the heat found at deep layers in the Earth, while ocean power plants use the energy from the oceans and seas: tides, waves or thermal gradient.
    • 3 environmental impact● 3.1environmental repercussions *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.
    • 3.1● Large hydroelectric power plants change the natural cycle of rivers, flood large areas and deteriorate the ecosystem. *Conventional thermar power plants producter air pollution, gives off large amounts of CO2 whitch increases the greenhouse and amit gases that cause acid rain.
    • 3.1● Nuclear thermal power plants are companied by the risk of a nuclear accident and the problem of nuclear waste. *The fuel we use in motor vehicles and heating systems gives off gases and pollutants.
    • Waste managementIn order to reduce the waste generated bythermal power plants we can install filters,usecoal with low sulphur cntent and protect largeeforested areas*some solutionsenergy efficiency*reduce the cosumption habits taht are morerespectful*renewable energy sources