Renewable sources of energy.

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Renewable sources of energy.

  1. 1. Renewable Energy By Mateusz Foligowski László Molnár and Sergejus Ivanovas
  2. 2. Agenda <ul><li>What is renewable energy? </li></ul><ul><li>Why do we need these? </li></ul><ul><li>Types of renewable sources </li></ul><ul><li>Conclusion </li></ul>
  3. 3. What is renewable energy? <ul><li>Generated from: </li></ul><ul><li>Sunlight </li></ul><ul><li>Water </li></ul><ul><li>Wind </li></ul><ul><li>Rain </li></ul><ul><li>Tides </li></ul><ul><li>Geothermal sources </li></ul><ul><li>Biomass sources </li></ul>
  4. 4. Why do we need these? <ul><li>Lack of non-renewable energy </li></ul>Coal 150-170 years Fossil Fuel 30-40 years Nuclear energy Long time, but low level of social acceptability
  5. 5. Why do we need these? <ul><li>Environmental problems </li></ul><ul><li>Water pollution </li></ul><ul><li>Air pollution </li></ul><ul><li>Nuclear waste </li></ul>
  6. 6. Why do we need these? <ul><li>To avoid disasters </li></ul>
  7. 7. Types of renewable sources <ul><li>I. Solar energy </li></ul><ul><li>The sun is free, but the solar cells and other equipments are very expensive </li></ul><ul><li>Varies with the season and weather </li></ul><ul><li>Comes from the sun </li></ul><ul><li>To heat or light buildings, to generate electicity, to heat the hot water </li></ul><ul><li>Passive and Active solar energy </li></ul>
  8. 8. Types of renewable sources <ul><li>I I . Wind power </li></ul><ul><li>Windmills -> to pump water or grind grain </li></ul><ul><li>Wind turbines -> to genetare electricity </li></ul><ul><li>World’s fastest-growing energy technology </li></ul><ul><li>1% of the world’s electricity comes from this way </li></ul><ul><li>It requires big territories </li></ul>
  9. 9. Types of renewable sources <ul><li>I II . Hydro power </li></ul><ul><li>Renewable due to the water cycle </li></ul><ul><li>Hydroelectric energy, Micro hydro system, Damless hydro system, Ocean energy </li></ul><ul><li>Uses water to power machinery or make elctricity </li></ul><ul><li>It gives the 20% of the World’s electricity and the 63% of the energy from renewable sources </li></ul>
  10. 10. Types of renewable sources <ul><li>I V . Geothermal energy </li></ul><ul><li>Obtained by tapping the heat of the Earth </li></ul><ul><li>Expensive to build, but cheap to operate </li></ul><ul><li>Dry steam, flash plants, binary plants </li></ul><ul><li>Hot dry rocks technology </li></ul><ul><li>Main users: USA, Iceland, Chile, Philippines </li></ul>
  11. 11. Types of renewable sources <ul><li>V . Biomass and Biofuel </li></ul><ul><li>M aterial from living, or recently living organisms . </li></ul><ul><li>W ood, waste, (hydrogen) gas, and alcohol fuels. </li></ul><ul><li>Biomass is commonly plant matter grown to generate electricity or produce heat. </li></ul>
  12. 12. Using of renewable energies
  13. 13. Thanks for the attention!

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