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Energy supply

Energy supply. Energiförsörjning. World energy supply and demand. Energy sources. Almost all the energy we use originates from the sun . The energy reaches us on earth via radiation .

zachery-andrews
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Energy supply

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  1. Energy supply Energiförsörjning

  2. World energysupply and demand

  3. Energy sources • Almost all the energyweuseoriginates from the sun. • The energyreachesus on earth via radiation. • The onlyenergysourcesthatare not connectedto the sunare:- Nuclearpower.- Earth heat.

  4. Bio-fuels • Fuelthatcomes from living organisms. • Firewood, charcoal, peat, halm, energygrass.

  5. Hydropower • To be abletousewater as power source, inland watershaveto be largeenough and landscape haveto be hilly. • Hydropower plants produce about 24 % of the world's electricity.

  6. Oil • Biggestenergy source in the world. • Producesabout 35 % ofenergy in the world. • Raw material for petrol, lighter fluid, kerosene and plastics.

  7. Gas • Usedto make electricity, as fuel for buses, and as industrialenergy source. • Gas reserveswillrunout in 60 years.

  8. Coal • Second biggestenergy source in the world. • Coalreserveswillrunout in a coupleofhundredsofyears.

  9. Nuclearpower • In 2012, therewere439 nuclear power plants in operation in the world. • New power plants built in Asia. • In Europe and Asia opposite trend.

  10. Windpower • In 2010 wind energy production counted for about 2.5% of total worldwide electricity.

  11. Waveenergy • Makinguseof the motion energy from waves. • Wave farms

  12. Geothermalenergy • Not connectedto the sun. • Makinguseof the internal heat of the globe.

  13. Solar energy • A direct form ofenergy.

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