Possibilities for alternative Energy in Germany

Edgar Ullrich Tuma, Julia-Marie Krüger, Riko Korzetz, Laura Malik, Christian Eichmann

Content:

Solar energy and Photovoltaic Hydropower Wind power Biomass Geothermal Power

Solar Energy and Photovoltaik

Solar collectors = alternative for solar cells

Good in Germany: electricity is cheap

Advantages: can be used to heat water ->

efficience factor 70% „long lifes“; about 40 years pays off (energy, money) in winter -> nearly all

heating by collectors

Solar Collectors

Photovoltaic = direct transformation of solar energy to electricity Photovoltaic = part of solar engineering Name: Photos + Volta (Alessandro Volta) Based on photoelectric effect (by Alexandre Edmond Becquerel ) Photovoltaic = not really effective in Germany (to less insolation,

no sun at night)

Photovoltaic

Hydropower

Kinetic energy of water transformed to electric energy

In former times –> water wheels and mills

Supplies 19% of world energy

Ocean current power stations; tidal power stations; wave power stations

General informations

Pro: No emmisions Limited ressources

aren´t needed Effective Possibilities of

saving energy for some time

Cons: Requires flooding Expensive Fishing close to the

station is difficult Dam failures!

Hydropower in Germany

Wind Power

Former times: wind used by windmills, sailing ships

Now: wind power stations Feeds 6.4 % of energy

demand in Germany (2007) Especially used in:

-> USA (25,170 MW)

-> Germany (23,903 MW)

-> Spain (16,754 MW) Growing Utilisation (look

right) A lot of research is done

General informations

= Expensive -> promotion by state

Mainly in the north (less mountains, less citys)

Mecklenburg Prepommerania:

A lot of wind power Less people (-> not

disturbed) „Offshore“ installations in

the baltic sea are build

Wind Power in Germany

Biomass

Biomass=renewable energy source

Living organisms (wood, waste, and alcohol fuels )

Use miscanthus, switchgrass, hemp, corn, poplar, willow, sorghum, sugarcane

CO2-neutral Usefull, because leftover

food can be used

General informations

Pro: You can use every

kind of biological things, e.g. leftover food, wood, corn,…

Biomass is not limited

Cons: Fewer food (and

etc.) Food -> more

expensive Burning ->

emissions

Geothermal Power

power extracted from heat stored in the earth was used for heating baths and rooms in ancient Roman

times can now be used for generating electricity generate now 0,3 % of global electrictiy demand

General Informations

Pro: pumps = long life no emissions little space needed less costs for

electricity and gas

Against: investment costs =

about 10,000 € complex installing just effective for

insulated houses big garden is

needed

Geothermal Power in Germany