1. ELECTRIC POWERPLANTSLaura Aparicio RecioIrene Lopez del Reino 3A 2011-2012

2. INDEXConventional electric power plants-Nuclear power plants-Fossil fuel thermal power plants-Hydroelectric power plantsNon-conventional electic power plants-Wind power plants and wind farms-Solar power plants-Geothermal power plants-Biomass thermal power plants-Ocean power plants 3. NUCLEAR POWER PLANT The nuclear power plants are specials thermoelectric power plant. Althught they are thermoelectric power plants, they dont produce heatby burning fossil fuels, such as coal,or oil,so they produce energy by fission ofUranium or Plutonium atoms .The structure is formed by a contaiment building at the backrground,that is whereThe nuclear fission take place. 4. How does nuclear power station function ? 5. The reactor is where fission take place.The uranium isplaced in very thin rods about 4 m long know as fossil rodsControl rods regulate the power produced by the reactor and can be raised and lower.Water is pumped around the reactor. This water is used to refrigerate the reactor.The primary circuit: water enters a steam generator. Then itflows back to reactor.The water in the secondary circuit is transformed into steam,that moves turbines and collect the energy that it producein the collector connectated to the turbine. 6. Fossil fuel thermal power plantsA fossil-fuel power station is a type of power station that burns fossil fuels such as coal to produce electricity.Fossil fuel power stations have machinery that transforms the heat energyof combustion into mechanical energy, which then operates an electricalgenerator. 7. How does thermal power stations function? 8. Steps to transform certains materials such as coal, in thermal power stations:1st step: Coal is burned in to the boiler to produce heat.2nd step: Thermodinamyc process consist of:-The heat produce by burning fossil fuel materials boilswater and transform it into steam.-The steam is then piped to a turbine.-The impulses of turbine moves the turbine.-Finally, steam is condensed and move into the boiler to repeat the cycle.3rd step: Rotation of the turbine rotates the generator toproduce electricity. 9. Hydroelectric power plantsThe hydroelectric power plants are stations whereenergy is produced by the force of falling water.The water moves a turbine connected to a generator that collect the energy that water creates. 10. Non-conventional electic power plants-Wind power plants and wind farmsWind stations are the ones that transform wind energy into another usefull kind of energy.A wind farm consist of almost a hundred of winds turbinesconnected to electric power transmission network.Parts of turbines;Rotor blades: Captures wind energy.Shaft: Channelizes the energy to a generator.Generator: Collect energy. 11. Solar power plants.That kind of power plants creates energy by transforming theheat and light from the sun.There are two types;-Solar thermal energy: It stores the heat of the sun, whichtransform water into steam, that moves turbines which areconnected to a generator that collect energy.- Photovoltaic energy: Is a method of generating electrical power by converting solar radiation into direct current electricity. 12. Geothermal power plantsThe geothermal power plants are plants where energy is created by theearths interior heat.Geothermal power is cost effective, reliable, sustainable, andenvironmentally friendly, but has historically been limited to areasnear tectonic plate boundaries.Geothermal electric plants were traditionally built exclusively on theedges of tectonic plates where high temperature geothermalresources are available near the surface. 13. Biomass thermal power plantsThe biomass thermal energy consist in burning the natural waste and rubish, such as plants, animals, food...It produces natural gases that provides heatto water, and wich transforms it intosteam, that later will move a turbineconnected toa generator that collectsenergy. 14. Ocean power plantsThe ocean power plants produce energy by ocean waves movements.That movements move a turbine connected with a generator thatstores that energy.The waves are produce by the wind in contact with surface.If the waves move slow, the energy will be lower than if the wavesare faster. 15. Enviromental impactsConventional enery impacts:- Fossil-fuels thermal power plants: Athmosferic pollution fromgas combustion- Nuclear power plants: Danger of radiation and contamination.- Hydroelectric power plants: Produces changes in the enviroment.Non-Conventional enery impacts:-Wind power: Visual and sound impact.-Solar power:Affecfs ecosystems as it covers large areas.-Ocean power: Envirometal changes resulting from requiredconstruction work. 16. Fernandosaxs articleEssay of the wind turbine that creates water from thin airThe company (CNN) aims to start rolling out the giant products in arid countries where water resources are scarce.Thy have thought in a device called air blower. It is a wind turbine that has an electric cooling compressor situated behind the propellers, so it extracts humidity from the air and the water is stored is stored in a tank.There are some countries that have little or no access to safe drinking water. The problem is that these countries cant afford this devices because they are very expensive, but with a lot of production, costs will decrease.Personal opinion: For us, water is an important priority.A lot of people suffer water shortages so these devices can help. But the problem is the costof manufacture, and we think these sites with high temperatures and water shortagescouldnt allow it.It may have a future because it is derived from inexhaustible natural sources.We think that 1000 L of water are not sufficient for a town of 2000 or 3000 inhabitants.