1. GFS E NGLISCH Luisa Johnen G1-1 04.05.10

2. Renewable Energy

3. Generally information Development Solar collector Photovoltaic Hydropower Advantages and disadvantages Potential Structure

4. What is it? -alternative to fossil fuels -rebuild themselves or are indefinitely available Why? -protect the environment -reduces the production of greenhouse gases -do something against the climate change - fossil fuels are limited  other source of energy How? - solar energy, geothermal energy, wind power or hydropower Generally information

5. Development

7. Change of solar radiation to heat 1.500.000 solar energy plants in Germany Idea originates from a hosepipe Solar collector

8. Solar radiation Glass Cold water Warm waterTube Isolation Absorber Heat radiation Tube Glass Vacuum Absorber Isolation

9. Drinking water Cold water Collector Solar radiation Cistern Cooling water Solar collector

10. Differences Photovoltaic and Solar collectors PhotovoltaicSolar collector - electric energy - efficiency: 14-18% - life span: 30 years - heath - efficiency: 75- 85% - life span: 40 years

11. 600.000 households in Germany produces electrical energy Photovoltaic

12. Photovoltaic cell inverter Public network

13. 8000 hydropower plants in Germany biggest plant of Germany in Thüringen biggest plant of the world is the Three Gorges Dam in China Hydropower

14. Dam Generator Turbine Water Hydropower

15. - simple and fast construction - indefinitely and worldwide available -produces no greenhouse gases during operation - high costs - solar radiation sticks to weather, time of the day and season  no constant energy supply possible Solar energy Advantages and disadvantages

16. - no greenhouse gases - simple construction - hydropower plants durable - high efficiency - loss of important living space in the water - impairment of nature and landscape - fish die because of the turbines Advantages and disadvantages Hydropower

17. half an hour: more energy than the world need in one year survey of 2008: 30% in 2020 50% in 2030 Potential

18. http://en.wikipedia.org/wiki/Renewable_energy http://www.soolux.com/uploads/tx_sftextbox/Erneuerbare- Energien-am-Gesamtverbrauch-98-07.JPG http://www.waermewechsel.de/fileadmin/content/Wissen- Daten/Erneuerbar_Heizen/Anteile_Waermeverbrauch_2008.jpg http://de.wikipedia.org/wiki/Sonnenenergie http://de.wikipedia.org/wiki/Wasserkraft http://de.wikipedia.org/wiki/Sonnenkollektor http://www.solarbusiness.de/fakten/sonnenenergie-die- populaere/alle-setzen-auf-die-sonne/ http://www.erneuerbare-energien.de/inhalt/42386/5466/ Sources

19. Thank you for listening!!