The principle of geothermal power generation is introduced. The advantages and disadvantages of geothermal power generation are analyzed.

Nowadays, with the improvement of people's environmental awareness, people will choose to use natural resources when choosing power generation resources, such as solar energy, wind energy, hydropower and so on. Now solar energy has been fully utilized by people, such as solar power generation. Of course, in addition to these natural resources, there are geothermal energy and so on. Many friends don't know much about geothermal energy and geothermal power generation. To solve these problems, let's follow Bian Xiao to learn about geothermal power generation.

Introduction of geothermal power generation principle

Geothermal energy in a narrow sense refers to the energy contained in the earth, which comes from the sun; Geothermal energy in a broad sense refers to renewable thermal energy from the depths of the earth, which comes from the decay of molten magma and radioactive materials on the earth. The English name is geothermalenergy.

Geothermal resources are divided into high-temperature geothermal resources according to temperature, and the temperature is higher than150℃; Medium temperature geothermal, the temperature is 90 ~150℃; Low temperature geothermal, the temperature is lower than 90℃. In terms of total amount, China is dominated by medium-low temperature geothermal resources, which are divided into steam hot water type, ground pressure type, lava type and dry-hot rock type according to their occurrence forms.

Advantages and disadvantages analysis of geothermal power generation

Advantages of geothermal power generation

Renewable; Widely distributed; Rich in reserves; Low unit cost; Building geothermal power plants is short and easy.

Disadvantages of geothermal power generation

Large capital investment; Restricted by geography; Low thermal efficiency, 30% of geothermal energy is used to drive turbine generators; The outflow of hot water contains high minerals; Some toxic gases will be sprayed into the air with hot air, causing air pollution.

The role of geothermal power generation

Bathing, aquaculture, raising livestock, soil heating and dehydration can all be carried out at 20~50℃.

It can be used for greenhouse heating, domestic hot water and industrial drying at the temperature of 50~ 100℃.

In the temperature range of 100~ 150℃, heating, refrigeration, double-cycle power generation, canned food manufacturing, dehydration and salt recovery can be carried out.

At the temperature of 100~200℃, it can be used for double-cycle power generation, refrigeration, industrial drying and industrial thermal processing.

At the temperature of 200~400℃, it can generate electricity directly.

Geothermal energy is directly used for heating, heating, hot water supply and hot spring health preservation, and it is the only geothermal utilization mode of secondary geothermal power generation.

Ground source heat pump is an efficient and energy-saving air conditioning system, which uses shallow underground geothermal resources for heating and cooling.

Ground source heat pump realizes the conversion from low temperature potential energy to high temperature potential energy by inputting a small amount of high-grade energy.

Through the summary of the above small series, we can understand the advantages and disadvantages of geothermal power generation and its utilization. I believe that through the above introduction, everyone has a further understanding of geothermal power generation. Our country is vast and rich in natural resources, but if human beings blindly destroy nature and the ecology deteriorates, it will not only damage natural resources, but also do great harm to ourselves, so we should protect the environment and nature. I sincerely hope that the above contents will be helpful to everyone.