german presentation about energy
TRANSCRIPT
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