The cycle of Carbon dioxide

Biomass

Biomass starts up with help of solar energy and from energetic view works as its accumulator. The advantage of biomass is easy, longterm energy storage. The disadvantage is the low efficiency of conversion of sunlight into energy. From one hectare field a year we can get biomass with an energy content of 40 to 90 MWh, according to the type of crop. It is less than 1% of solar radiation for this area a yaer. By processing of biomass fuel and its combustion to obtain heat or electricity we generate further energy loss. Biomass in terms of potential energy use includes any organic source containing bound chemical energy as is wood and wood waste in various forms, agricultural crops and its waste, waste from animal and food production and biodegradable fractions of industrial and municipal waste.

Biomass sources

Forest biomass

Agricultural

Municipal waste

Solid fuel

Gaseous biofuels

Liquid biofuels

Principle of solar collectors

Solar energy

The Earth accepts 10 times more energy a year then people need. Solar energy is energy from the sun. It comes to Earth in the form of radiation. It consists of heat and light energy. They come in the form of electromagnetic waves.

Principle of wind turbines

Wind energy

Wind energy is globally the most important type of renewable energy that is used to generate electricity. Wind parks in EU in 2009 covered 4.2% of total electricity consumption. The wind is caused by uneven warming up of the earth's surface by solar radiation. That is why the areas with different pressure occurs the flow which kinetic energy can be used.

Geothermal Energy - Illustration

Geothermal energy

Geothermal energy is classified as a renewable energy source, but from technical point of view it is not. It comes from the hot core of the earth through volcanic cracks in the rocks. There is the largest source oh heat under the eart surface which is almost inexhaustible. It is renewingin parts.The Earth constantly emits heat and the temperature of the Earth's wrape increases in proportion with increasing depth. The temeparture increases 20 to 40 ° each kilometer. The Slovak Republic is relatively rich in geothermal sources. Geological research indicate that the total potential of geothermal energy SR is about 5.5 thousand. MW power. Registrated are 116 the geothermal wells 116 with temperature in the range 18-129 ° C. The most prospective area of geothermal energy is source of 200km2 in Kosicka kotlina. The area of villages Svinica, Ďurkov, Bidovce is the most strategic. The potential of this area was discovered during a major research in time of CSSR focused on exploring hydrocarbon deposits springs with a temperature of 120-160 °C which are not deeper than 3 km.

The cycle of water on Earth

Hydroenergy

The use of kinetic energy of water is the most developed and important kind of RES. The technical potential for energy production based on hydroenergy is 7,600 GWh per year. It represents about 17% of electricity consumption in SR.