SOLAR ENERGY

Solar energy

Photovoltaik

Photovoltaic converts sunlight directly into electricity. In solar cells, the incidental sunlight is converted into electricity by exploiting the photovoltaic effect.
A distinction is made in mono or polycrystalline cells. Solar cells use layers of semiconductor materials only a few micrometres thick with wafers cut from silicon blocks and disordered arrays of atoms.

After the introduction of the Renewable Energy Law (EEG) in Germany in the year 2000, the number of installed solar panels has increased dramatically over the last ten years. Before the introduction of the EEG only 32 MWp were installed. In 2009, the solar energy (electricity) already amounted to 6.2 TWh. Thus, for the first time, the proportion of the German power generation by solar power was more than 1%.

Photovoltaic systems are material assets with long endurance and proven technology. In addition, they are ecologically viable, financially attractive and profitable.
The overall price trend of solar modules, the diverse possibilities for solar energy usage and secure feed-in-tariffs in Germany (for a period of 20 years) all make solar investments attractive and profitable. In addition, photovoltaic investments are not subject to stock market behaviour and are independent of the current market and price fluctuations.

Solar heat

Solar heat means the use of solar energy to heat water for domestic use or heating.

The International Energy Agency IEA has shown in a report that by the end of 2008, the capacity of the solar heat collectors installed all over the world was 171 gigawatts thermic (GWth). Based on the entire installed capacity, China is the front-runner and Germany is in third place. According to the IEA report, at the time of the investigation, 101 GWth capacity of solar heat systems were installed in China, 8 GWth each in both Turkey and in Germany.

The industry uses solar thermal plants for the production of process heat. Further fields of application are cooling and air conditioning technologies and – in a broader industrial context – the user of solar thermal power plants.

A solar heating system consists of a solar collector, a control unit with pumps and a hot water tank. The construction of the power plant itself is critical for maximising later earnings.


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