Geothermic Energy

Geothermic energy

The end of the era of oil and the rising prices for oil and gas will accelerate the methods for he production of renewable energies.
Even in Germany the geothermal potential can be fostered.
An energy that’s not only environmental friendly and climate- friendly, it is also all the time available.
With new developed technologies and methods, the requirements for the production of electricity can be changed through geothermic energy.

Katja and Wilhelm

Solarthermie

Solar thermal energy is a technology for harnessing solar energy for thermal energy, which is then used to produce electricity. Already in the ancient burning mirrors were used to profit from solar energy. This kind of energy has many advantages: it is independent of fossil and nuclear fuels, doesn’t send out carbon dioxide and produces the solar electricity on the cheapest way which can be transported inexpensively over long distances. The only disadvantages are the high costs and the fact that solar energy can’t be economically exploited everywhere because the solar radiation is unevenly distributed around the world. Solar energy is especially well used at the sunbelt of the earth where the sun shines often and the intensity of the sun is the highest. In the most European countries the usage of solar energy is only effective for households. They use the heat for bathing and showering, as heating assistance and for the heating of drinking water. A typical household solar heating system consists of a solar panel or solar collector with a heat transfer fluid flowing through it to transport the heat energy collected to somewhere useful, usually a hot water tank or household radiators. The solar panel is located somewhere with good light levels throughout the day, often on the roof of the building. A pump pushes the heat transfer liquid (often just treated water) through the panel. The heat is thus taken from the panel and transferred to a storage container. There are three typical kinds of collectors: Parabolic trough collectors, Vacuum tube collectors and Flat plate collectors. Solar energy is used in Solar thermal power plants, as well. There, the heat of the sun is obtained through absorbers and is the primary energy source of the power plant. The cycle for power generation is similar in the different kinds of solar thermal power plants: the radiances of the sun are concentrated, the derived heat produces steaming which moves a turbine with a generator where electricity is produced. Solar thermal power plants are divided in two categories: plants with Integrating direct radiation (like Parabolic trough power plant, Solar power tower and Dish-Stirling system) and plants without Integrating direct radiation (like solar pond power plant). There are these kind of power plants in the US, Spain and France.

Maxi & Mandy

Fuel Cell Vehicle

The Fuel Cell Vehicle
They are transportation with electric drive, the electric power from energy sources such as hydrogen or Mehanol need. They are regarded as largely experimental. In the current development, they are in competition with the electric car. In July the first car came in series production, the Honda FCX. The construction of infrastructure for hydrogen production, hydrogen storage and refueling is still open.

Carolin and Klemens

Nuclear energy

Nuclear energy
Nuclear energy or atomic energy is on the one hand a kind of primary energy that is released at nuclear reaction. On the other hand it is technology and industry to produce secondary energy marked with it. Nowadays, nuclear fusion reactors are explored but the nuclear fission is used in nuclear power stations till the 1950`s. The production of secondary energy with nuclear fusion is not yet realised, now. Nuclear power stations convert energy of induced nuclear fission to electric energy. Electricity generation that is released with nuclear fusion is the aim of fusion research. Other nuclear reactions release nuclear energy too but it has no technical denotation.

Jenny and Victoria

Energy site Lubmin

Production of energy in Lumbin
Lubmin is a seaside resort near our school in Wolgast. But it s not only famous for the beach as a destination for the holidays.
In 1967 they started to build an atomic power plant two kilometres away from the village. Before all six reactor blocks were finished they stopped the construction. But it worked a long time, too.
In 1995 they started to dismount the buildings and use the place for other kinds to produce energy. Now the place is called EWN. A lot of firms have a position there because they can use the new harbour and the streets. You can find al lot of firms which use renewable energy. For example there is a solar power plant, a plant which uses biological refuse and some other things.
In the last month Lubmin was often in the media because a Danish concern wants to build a coal-fired power station nearly Lubmin. There is a big discussion because of the dirty air it will produce and the picture of Lubmin as holidaydestination.

Sarah, Vivian, Stefanie

Wind energy / Wind power station

advantages
disadvantages
· environmentally friendly, renewable, modern form of energy production
· wind = inexhaustible, free energy resource
· no expensive power lines
· 35% cost cutting are possible in the next 10 years
· animals and grazing cattle are accustoming quick
· dependency of wind conditions
· visual and acoustical disturbance of the environment
· noise of the wind turbines
· impairment of birds
· problems to find the right positions for wind power stations


Amount at the international power supply

· wind energy amount at the German power supply: 6,4%
· worldwide: Germany = wind energy champion (next to: USA, Spain, India, China…)
· increase of 30% in the last years

A special kind of wind power stations: Offshore-power stations

· Pro: wind at sea = stronger and more constantly, far away from people
· 50% more energy production than the production onshore BUT: extremely expensive construction
· 30 m under the sea level grounded
· risks: raw weather, heavy storms, aggressive salted water, perhaps ice floes

Lisa and Sophia

Bioenergy

Bioenergy

Bioenergy is renewable energy made available from materials derived from biological sources. In its most narrow sense it is a synonym to biofuel, which is fuel derived from biological sources.
In its broader sense it inclues biomass, the biological material used as a biofuel, as well as the social, economic, scientific and technical fields associated with using biological sources for energy. This is a common misconception, as bioenergy is the energy extracted from the biomass, as the biomass is the fuel and the bioenergy is the energy contained in the fuel.
Biomass is any organic material which has stored sunlight in the form of chemical energy. As a fuel it may include wood, wood waste, straw, manure, sugar cane and many other byproducts from a variety of agricultural processes.

Advantages:
As an energy source biomass is nearly 'CO2 neutral', that is (assuming it is grown in a sustainable way) any bioenergy crop will fix as much CO2 from the atmosphere as it grows as will be released when it is burnt. Growing bioenergy crops can give a boost to rural economies, providing an alternative market for existing crops. Biomass also has the advantage that it can be mixed in with other fuel sources.

Despite all these advantages, bioenergy is not without controversy. Biofuels, or fuel production from agricultural products, has been the subject of much debate in recent years. The argument of food vs. fuel has sparked from the call of energy engineers and scientists to shift to renewables like bioenergy. This is because biofuels are sourced from agricultural food products, such as corn, wheat, sugar cane, palm oil, cassava, and jatropha. Apart from using the food materials as source, there is also debate on the use of agricultural land for planting sources of biofuels.

Luisa and Janine

Vortragsthemen 2009

Windkraft - Sophia, Lisa
Solarthermik - Mandy, Maxi
Geothermie - Katja, Wilhelm
Bioenergie/Biogas - Luisa, Janine
Wasserkraft - Paul, Paul
Brennstoffzelle/Wasserstoffauto - Carolin, Klemens
Elektroauto - Tina, Lisa
Energiespeicherung - Martin, Phillipp, Ariane
Kernenergie - Jenny, Victoria
Energiestandort Lubmin - Sarah, Vivian, Stefanie
New Energy am Arbeitsmarkt - Sophia, Lars

Questionnaire

We did a questionnaire about new energy in the group.
There were 13 participants until now.

Some typical answers are as follows:

I. 5. the wall is made of: stone, concrete, bricks

I. 9. energy production utilities in the territory: wind towers, solar plates, former nuclear station, forest, planned gas pipeline, biogasstation, planned carbonpowerplant

II. 10. kind of fuel for heating: gas, oil, wood ................... central heating
II. 11. cost of heating per person per year: 500 - 1200 €
II. 16. amount of electricity per person per year (kwh): 1000 kwh or 200 - 300,-€

IV. 24. fuel for driving per person per year (liter): 200 - 600
IV. 26. average distance of holiday site: 200 - 3000 km

VII. 30.ideas to better energy efficiency:
driving with bike,
short ways,
a car with air pressure instead of oil
going instead of driving,
vacation in the near surroundings,
much lighter cars,
intelligent systems

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