Sankey Diagrams

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Sankey diagrams show energy transformations

  • Sankey diagrams show how much energy put in is turned into useful energy and wasted energy
  • The more energy there is, the thicker the arrow
  • The most efficient appliances will have the thickest useful energy arrow(s)
  • With a sketch like this, you don't know the actual amounts
  • But you can tell that most of the energy is wasted as heat 

Power Stations are not very efficient 

  • Power stations generate (make) electricity
  • But lots of energy is wasted as heat and noise during generation


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