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imagen (Electricity (Transport of electrical energy (Increasing the…

- - - - In factories
    - - hot water systems
  - - - Primary
        
        Obtained directly from nature
        
        crude oil or natural gas
      - Secondary
        
        transformation of primary sources
        
        electricity or petroleum denvatives
    - - Conventional
        
        industrialised countries
        
        fossils fuels
      - Non-conventional
        
        Alternative energy sources
        
        Solar and wind power
    - - Renewable
        
        Abundant and inexhaustible
      - Non-renewable
        
        Depleted when we use them up
        
        Cannot be renewed in a short penod of time
        
        May or may not be abundant
    - - Clean
        
        Low environmental impact
        
        Don degenarate in pollutional products
      - Pollutants
        
        Cause negative effects on the environment
- - - - Converts mechanical energy into the rotating movement
        of a shaft
    - - has a fixed part, called a stator, and a moving part,
        called a rotor, connected to the turbine shaft
- - - - Electricity is generated as a result of 2 combined cycles, use air and gas. During the first cycle a gas turbine is used that includes a compressor.
      - Air is mixed with the gas and is burnt, which generates electricity in the system. The combustion gases are transported to a boiler where they transfer their energy to the water during the second cycle
  - - - Gravity-driven hydraulic power plants
        
        Water used follows the course of a river and will not be reused
      - Pump-diven hydraulic power plants
        
        water descends into a reservoir located at a lower height, then pumped to a higher reservoir to reuse it
- - - - Photo-thermal power plant
        
        In this type of power plant, the heat generated by radiation produces steam that is used to move the rotor in the generator. To do this, they use special mirrors, called heliostats, that reflect sunlight and concentrate it at one point, where it reaches a high temperature
      - Photovoltaic power plant
        
        Solar radiation is transformed directly into electricity by panels of photovoltaic cells
    - - Geothermal energy may be used directly (for hot heating, industrial use and so on) and indirectly (the heat generates steam, which produces electricity)
    - - This power plants use the cinetic energy of the wind to move the blades of a rotor at the top of a tower; this id refered to as the wind turbine
    - - Forestry and agricultutural waste
      - Specific crops, such as sunflowers and sugar beet
      - Waste from agri-food industries
    - - The mechanical energy from the waves
      - The mechanical energy from the tides
      - The energy from the ocean's thermal gradient
- - - - The explotation of fossil fuels and nuclear power means the depletion of resources, which makes it necessary to find new ones
    - - Oil is transported by meas of oil pipelines and oil tankers
        
        Oil pipelaines can suffer accidents caused by nature or human error, which result in uncontrolled spills
        
        Oil can have accidents at sea, with the risk of oil spills. Some spills have caused oil slicks that have taken years to clean up and dissipate and have affected the lives of many plant and animal spieces
    - - Hydroelectric power plants
      - Conventional thermal power plants
      - Nuclear thermal power plants
  - - - Install special filters
        
        Use coal with a low sulphur content
        
        Maintain and increase the size of large
        forested areas, since they absorb carbon dioxide