How is geothermal heat formed? How does geothermal heat come about?

Thermal resources refer to the thermal resources in the interior of the earth that can be economically exploited and utilized for human beings, and are also a kind of clean energy.

The Earth is a vast reservoir of heat that consists of the Earth's crust, mantle, and core. We know that the further underground you go, the warmer it gets, and geothermal heat refers to the energy stored in the Earth's interior. The normal warming gradient from the earth's surface down is 25-30 per 1000 meters, and the temperature can reach 1200 at about 40 kilometers underground, and the temperature at the center of the earth can reach 6000.

Due to tectonic reasons, the heat flux on the earth's surface is unevenly distributed, which forms geothermal anomalies, and if there are geological conditions such as caprock, reservoir, heat conduction, and water conduction, the development and utilization of geothermal resources can be carried out.

Geothermal resources are hot spring water that uses water as a medium to bring the tropics to the surface. There are hot springs in many places in China, and the famous Xiaotangshan Hot Spring is one of them. At present, we have carried out geothermal resource exploration and research in Beijing area for more than 40 years, and we can bring hot water thousands of meters underground to the surface with drilling methods, that is, hot springs, which is the development of geothermal resources.

The Earth is a vast reservoir of heat that consists of the Earth's crust, mantle, and core. We know that the further underground you go, the warmer it gets, and geothermal heat refers to the energy stored in the Earth's interior. The normal warming gradient from the earth's surface down is 25-30 per 1000 meters, and the temperature can reach 1200 at about 40 kilometers underground, and the temperature at the center of the earth can reach 6000.

Due to tectonic reasons, the heat flux on the earth's surface is unevenly distributed, which forms geothermal anomalies, and if there are geological conditions such as caprock, reservoir, heat conduction, and water conduction, the development and utilization of geothermal resources can be carried out.

Geothermal resources are hot spring water that uses water as a medium to bring the tropics to the surface. There are hot springs in many places in China, and the famous Xiaotangshan Hot Spring is one of them. At present, we have carried out geothermal resource exploration and research in Beijing area for more than 40 years, and we can bring hot water thousands of meters underground to the surface with drilling methods, that is, hot springs, which is the development of geothermal resources.

Geothermal heat is gradually accumulated by the earth in the long process of evolution, and the heat stored in the interior of the earth is a natural energy source, also known as underground heat. The generation of geothermal heat is mainly due to the heat released during the transformation of radioactive elements in rocks, and is the main energy source for volcanoes, hot springs, and crustal movements.

Geothermal energy. There are various forms of storage in the ground, such as hot water type, steam type, hot dry rock type, ground pressure type, magma type, etc.

At present, in addition to using hot water geothermal energy to generate electricity for bathing, heating, and irrigation, people are also digging artificial thermal springs to make full use of the widely distributed hot dry rock type geothermal energy.

Geothermal resources are a renewable energy source that can be replenished and regenerated by itself as long as it does not exceed the development limits of geothermal resources.

Geothermal heat is formed by the heat generated by the decay of radioactive elements contained in the earth's material.

The Earth can be seen as a solid sphere with an average radius of about 6371 km. It is constructed like a soft-boiled egg and is mainly divided into three layers. The Earth's exterior is equivalent to an eggshell, and this part is called the "Earth's crust", and its thickness varies from a few kilometres to 70 km, with the continental crust being thicker and the oceanic crust being thinner.

Underneath the earth's crust is the "mesosphere", which is equivalent to the egg skin, also known as the "mantle", which is mainly composed of molten magma and is about 2,900 km thick. The part of the earth's crust that is equivalent to the yolk of the egg is called the "core", and the core is divided into the outer core and the inner core.

Over the course of Earth's history, the heat generated in the Earth's interior due to the decay of radioactive elements has averaged 5 trillion kilocalories (i.e., calories) per year. In August 1981, the United Nations New Energy Conference was held in Nairobi, the capital of Kenya, and according to the technical report of the conference, the potential resources of global geothermal energy are equivalent to 450,000 times the total global energy consumption.

Geothermal energy is the natural heat energy extracted from the earth's crust, which comes from the lava in the earth's interior and exists in the form of heat, which is the energy that causes volcanic eruptions and **. The Earth's interior can reach temperatures of up to 7,000 degrees Celsius, and at depths of 80 to 100 miles, the temperature drops to 650 to 1,200 degrees Celsius.

Through the flow of groundwater and the surging of lava into the earth's crust 1 to 5 km above the surface, the heat can be transferred closer to the surface. The hot lava heats up the nearby groundwater, which eventually seeps out of the ground. The simplest and most cost-effective way to harness geothermal energy is to take these heat sources directly and extract their energy.

It is mainly the thermal return energy generated by long-lived radioisotope thermonuclear reactions in the Earth's interior.

It is generally believed that geothermal energy is mainly the heat released by the transformation of radioactive elements in the earth's interior, followed by the rotational energy generated by the earth's rotation, gravity differentiation, chemical reactions, and the heat energy released by rock and mineral crystallization. In the process of the formation of the earth, the total amount of these thermal energy exceeds the thermal burial energy dissipated by the earth, forming a huge heat reserve, which causes the local melting of the earth's crust to form magmatism and metamorphism.

Years of practice have shown that the comprehensive development and utilization of geothermal resources has significant social, economic and environmental benefits, and has shown an increasingly important role in the development of the national economy. China's leading institutions, geology, mining, petroleum, coal and other departments attach great importance to the exploration, research and development and utilization of geothermal resources, and allocate a large amount of funds every year, in addition to the development of high-temperature geothermal resources for power generation and utilization.

At the same time, it also develops the direct utilization of medium and low temperature geothermal resources, that is, the "three major areas" formed by southern Tibet and western Yunnan, North China and the southeast coastal areas in the west, as the key areas of geothermal exploration, research and development and utilization in the country, and combines with the demonstration sites of experimental development and utilization of typical geothermal fields, and has achieved significant results and promoted the development of the development and utilization of geothermal resources in the country.