Renewable energy sources. Importance of use

Under the close attention of scientists in the lasttime renewable energy. The time has come that made us think about tomorrow and clearly understand that the use of Earth's minerals can not be infinite.

Renewable energy sources (RES)

The fusion reaction of the Sun isthe main process of the emergence of alternative energy. According to astronomers, the estimated life of this planet is five billion years, which allows us to judge the almost infinite reserves of solar radiation. Renewable energy sources are not only incoming streams of the Sun, but also other derivatives - alternative sources: the movement of wind, waves and the water cycle in nature. For a long time, nature was adapting to the use of solar radiation and thus reached thermal equilibrium. This received energy does not lead to global warming, since, having started all the necessary processes on Earth, it returns back to space. Rational use of renewable energy is paramount scientists, leading scientific developments in this field.After all, of the total solar radiation received, only a third is used to support life processes on the Earth, 0.02% is consumed by plants for the photosynthesis they need, and the remaining unclaimed part is returned back to outer space.

Types and applications

Renewable energy sources consist of several main components:

• The sun. In this case, the received stream is used directly through solar panels. The transformation of electromagnetic radiation allows you to have at the output electrical or thermal energy.
• Wind.With the help of wind generators or windmills, the kinetic energy of the air mass is converted into a thermal or electric current. Where such renewable energy sources are introduced, coal is saved up to 29,000 tons and oil is about 92,000 barrels per year.
• Geothermal water.As a heat carrier for thermal power plants, hot geothermal sources are used. Geothermal power stations are being built in the area of ​​volcanically active zones, where water rises to the ground surface and has a boiling point at the outlet. These underground sources are located at a relatively shallow depth, and they are accessed through drilled wells.
• Water.The construction of power stations allowed using the water flow as an energy source. To use the potential of waves, wave power stations are being built, the specific power of which exceeds the power of wind and solar installations.

The National Laboratory of Denmark prepared a reportwhere it was said that by 2050 the world would be able to switch to obtaining energy with a very low level of carbon emissions. At the same time, its cost price will be much less than the cost of extracting natural resources from the Earth’s interior.