Tag Archives: Geothermal Energy

The Use of Geothermal Energy for Other Purposes

Another form of exploitation of geothermal energy is the warming. The largest geothermal system for the warming is in Iceland, in Reykjavik, where all the buildings use geothermal energy for the warming (89% of households). Apart from Iceland as the largest consumer of geothermal energy, countries like New Zealand, Japan, Italy, Philippines and some areas of the United States (San Bernardino, California, Boise, Idaho) also use a large amount of this energy.

Geothermal energy finds its use in agriculture to increase harvest. The water from the geothermal storage is used for warming the greenhouse for the production of flowers and vegetables. It is not only the warming of the air, but also the earth, on which the plants grow. In central Italy, this method is used for centuries. In Hungary, 80% of the greenhouses are concerned by the geothermal energy.

Thermal pumps are another forms in using geothermal energy. They use electrical energy for the diffusion of the geothermal fluid, which is later used for warming, cooling, cooking and preparation of hot water. Therefore, the need for electrical energy is reduced.

Geothermal energy can be used in many ways. Some uses are for breeding the fish, for different types of industrial use, or balneology, the use for recreation and spas.

Geothermal Energy

The origin of the word lies in the Greek words geo (earth) and therme (heat), which means the heat from the earth. Therefore, the thermal energy of the earth is called geothermal energy. The heat inside the earth is the result of the First Hung planet four billion years ago, out of the dust from the gases. Radioactive decay of elements in rocks regenerates this heat, and therefore, the geothermal energy renewable energy source.

Geothermal energy is the basic medium for the transport of heat from inside the water or steam. This component is replaced with the help of the rain that penetrates deep into the cracks, that warms up and circulates back to the surface. It appears in the form of geysers and hot springs.

The Earth has some layers. Essential external hard crust layers (crust), liquid sheath (Mantle), superficial liquid core (outer core) and inner hard core (inner core). External hard crust of the earth has the depth of 5 to 50 kilometers and consists of rocks. Substances that are coming from the inner layer to the surface are through volcanic vents and fissures on the ocean floor.

Under the crust is the envelope which propagates to the depth of 2,900 kilometers that consists of iron and magnesium compounds. The radius of the earth is 6,378 km. No one knows exactly what is inside, all that was mentioned, is only if scientific guesses. These assumptions are based on the experiments under high pressure and high temperatures.

The temperature increases with the decrease of the core to about 17° C to 30° C for every kilometer (50 – 70 º F for every mile). Under the core is the shell that consists of partially molten rock and its temperature is 650 i 1250° C (1200-2280 ° F). At the core of the Earth, the temperatures according to some evaluations are between 4000 and 7000° C. Because the heat is always from warmer to colder parts of passes, the heat comes from the interior to the surface. This transport is the main instigator of the tectonic plates.

The connection of these plates flow from the magma in the upper layers. This magma is then cooled and creates a new layer of the earth’s crust. When the magma comes to the surface, it can create volcanoes. But in most cases, it remains below the surface. There, it transforms a huge pool. After, the magma cools and this process takes 5,000 to one million years. Areas of these basins have a high tendency of temperature, i.e., the temperature rises very rapidly with the increase of depth, and these areas are very suitable for the utilization of geothermal energy.