1. The 4 Elements of green energy

2. Arrangement of the presentation Short overview Water Earth Wind Sun Pros and cons of these energys Commendation for the future

3. Green Energy in Germany Far developed Green ernergy grows in Germany Several projects in different landscapes Big ambitions to change the energy resourcing

4. Water as an Energy Saver Water is one of the oldest form of enrgy used by human. Brings much energy There are different kinds to use it

5. Water wheel Three different kinds Used in the middleage and nowadays not so much Pruduces electricity Built at rivers

6. Tidal power station Uses the energy of the sea Can be built at around 100 bays Produces kinetic energy or electricity Only a few hours expedient

7. Energy through geothermal energy

8. Introduction to the goethermal sources Near – surface geothermal energy  Direct use for heating and cooling Depth geothermal energy  Used for heat market  Indirect use to produce electricity Three kinds of heat extraction: Hydrothermal system / Hot-Dry-Rock system / Earth-heat probes

9. Hot-Dry-Rock system

10. Development of geothermal energy Used since Roman Empire First geothermal power generator in Italy 20th century that geothermal power started being used to make electricity

11. Geothermal sources in Europe

12. Development worldwide Geothermal power is generated in over 20 countries Germany  Renewable energy law / new power plants  2003 in Neustadt-Glewe, northern Germany  Biggest project will start in Cologne 2009 Iceland  Most use of geothermal energy

13. Wind energy

14. Wind – a source with future Many windparks in Germany The wind will never stop 6% of the electricity in Germany Nowadays, for electricity

15. History of windenergy 30 years ago, atomic energy was one of the green energys After meltdown in chernobyl the nations looked for new save energy In the 90‘s the green energy and environment arrived the world political agenda Germany started as one of the first their support for green energies in 1992 Kyoto

16. Development of wind energy in Germany

17. Offshore parks

18. Offshore 20-40km away from coastline 20-40m deep water Experience with offshore parks very limited Financing is very hard because of the unknown risks Goverment supports the development through fixed tariffs 20 projects adding the capicity to 500MW

19. Future trend Repowering Too many old wind turbines in the mainland New turbines: height over 100m 35% more energy capacity

20. Solar energy

21. General Energy produced by the radiant heat and light from the sun Useful in regions with much insolation The sun is the biggest energy source in our galaxy (3,9*10^24 J/year = 10000 times more than the world needs) If the whole Sahara would be photovoltaik there would be enough energy for the whole world. Difficult to save the solar energy In Germany only 0,83% of the energy.

22. Insolation in Germany Global radiation 1981 – 2000 Average of the year in kWh/m²

23. History of solar energy 1891 the first steam engine with solar energy was built from Sir Muchout in England 1912 in Cairo: sun collectors

24. History of solar energy Through the oil ambargo in the 70‘s the solar energy got more important after the collapse of the Sowjet Union Germany started programs to support green energys like solar energy

25. Green energy in Europe and Northafrika

26. Pros and Cons of Green Energy

30. Targets in the Future 2010: 21% of the energy in the EU should be green energy 12% of the energy in Germany should be green energy 2020: 20% have to be green energy in Germany 2050: at least 50 % have to be out of green resources

31. THE END Created by: Ronja, Markus and Julius