the 4 elements of green energy. arrangement of the presentation short overview water earth wind sun...

The 4 Elements of green energy

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

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Green Energy in Germany

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

resourcing

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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

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Water wheel• Three different kinds• Used in the

middleage and nowadays not so much

• Pruduces electricity• Built at rivers

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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

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Energy through geothermal energy

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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

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Hot-Dry-Rock system

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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

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Geothermal sources in Europe

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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

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Wind energy

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

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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

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Development of wind energy in Germany

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Offshore parks

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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

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Future trend Repowering• Too many old wind turbines in the

mainland

• New turbines: height over 100m

• 35% more energy capacity

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Solar energy

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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.

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Insolation in GermanyGlobal radiation 1981 – 2000

Average of the year in kWh/m²

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History of solar energy

1891 the first steam engine with solar energy was built from Sir Muchout in England

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1912 in Cairo: sun collectors

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

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Green energy in Europe and Northafrika

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Pros and Cons of Green Energy

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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

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THE END

• Created by: Ronja, Markus and Julius

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