Hallo, ich muss eine Präsentation halten, was würde euch noch fehlen außer vor und Nachteile:
Renewable energies are sustainable energy sources. Renewable energies are not Infinite.
For example, a regenerative energy source would be solar energy, since the sun is virtually
inexhaustible within the human time horizon. When energy is produced, there is no emission
of c02. Oil or coal is not Renewable, because it takes millions of years till it develops.
Different types of renewable energies
There are 5 different types of renewable energies.
Wind Energy, Solar Energy, Biomass, Hydropower, geothermal.
Solar energy is the biggest renewable energy on the Erath. The sun's radiation is converted
into energy. The use of Solar Energy depends on the season. In the Summer, the efficiency
is much higher as in the Winter time. The direct transformation of the Sun Energy is called
photovoltaics. In Germany we produce 38,3 Terawatt hours per year.
Wind energy or wind power is the large-scale use of wind as a renewable energy source.
Wind energy is one of the most promising renewable energy sources due to its global
availability, low cost and technological development. Wind turbines can be built everywhere.
The only problem is, that they are very loud. The wind flow drives a rotor blade, which
converts kinetic energy into mechanical energy. In Germany we produce 80 Terawatt hours
Hydropower has great potential for generating electricity. The water falls through a shaft in
which a turbine is. The water drives the turbine, and the turbines drive the generator. The
higher the water falls, the more power you will gain.
In the case of geothermal energy, the heat of the earth is used to heat houses, or to generate
electricity. A big cave is dug out where water is brought in. There, the water warms up and
becomes steam, which is directed to a turbine. There, the turbine drives a generator. Then
the water flows into a cooling tower and then back into the cave.
Expansion of renewable energies:
By 2040, 20% of the electricity generated in the EU will be produced by renewable energies.
In Germany we produce 31% out of renewable energies, but by 2050, the share should rise to 80%