Energy and efficiency

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  • Energy and efficiency
    • Most kids hate learning GCSE energy names
      • Magnetic
        • Kinetic
          • Heat
            • Light
              • Gravitational potential
                • Chemical
                  • Sound
                    • Elelctrical
                      • Elastic potentail
    • Energy transfers
      • Sankey diagrams
        • Wasted energy- dissipated
        • All energy transfers
      • Energy transfer diagrams
        • Only shows usefull energy
      • Energy can be transferred usefully, stored or dissipated. It cannot be created or destroyed.
      • Efficiency= useful energy÷total energy x 100
    • Power measured in watts
    • Units of energy are measured in Kilowatt hours
    • E=PxT
      • E is the energy transferred in kilowatt-hours, kWh.
      • P is the power in kilowatts, kW
      • T is the time in hours, h
  • Energy transfers
    • Sankey diagrams
      • Wasted energy- dissipated
      • All energy transfers
    • Energy transfer diagrams
      • Only shows usefull energy
    • Energy can be transferred usefully, stored or dissipated. It cannot be created or destroyed.
    • Efficiency= useful energy÷total energy x 100

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