DT GCSE 9-1 Topic 2: Energy generation and storage

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  • Energy generation and storage
    • How power is generated
      • Non-renewable
        • Formed in the carboniferous period. Dead organisms and plants sank to the bottom of swamps and decomposed under layers of sand clay and other minerals
          • Coal = trees and plants + heat& pressure
          • Oil= small animals (e.g plankton) + pressure= decomposition
          • Natural gasses= small animals (plankton)+ pressure and heat
      • Nuclear energy
        • Energy stored in the nucleus of an atom
        • Fission
          • The splitting of a nucleus (uranium 235) into two smaller nuclei producing 2-3 neutrons and energy
        • Fusion
          • The joining of two small nuclei to make one big /larger nucleus lots of energy is produces.
          • ATM only happends in the heart of a star (the sun)
    • renewable energy
      • wind
        • airs motion becomes mechanical energy via a turbine connected to an electromagnetic generator
      • solar
        • passive
          • No moving parts capture and use the suns raise e.g green house.
        • active
          • Mechanical components like fans or pumps to circulate heat carrying fluids.
          • residential or commercial heating
          • CSP= mirrors concintrate the suns rays on one point steam produced so turbine is reated generator produces electricity
      • Hydro power
        • Tidal power
          • creates energy from the natural rise and fall of the tides
          • tidal barrages, tidal fences and tidal turbines.
          • Predictable energy source
        • turbine+ generators
        • dams and run of river
    • Energy storage systems including batteries
      • Methods of storing electricity need for energy storage systems= higher need for energy for demand
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