Chapter 330

Deep geothermal is a new energy technology which was studied in the federal government around the 1970s.

Its main principle is to guide the heat contained in the dense and impermeable high-temperature rock mass at the depth of 2000-3000 meters underground to the surface through drilling, water injection and other means, and use it in the fields of heating, power generation and so on.

This technology is favored because of its low cost, clean and recyclable advantages. It has been promoted and applied in many countries with abundant geothermal resources. However, limited by the speed of development of technology, this technology has not formed a mature utilization system until this century.

"The utilization of deep geothermal in China started relatively late and formed a considerable scale only after the technology matured in recent years." The person in charge seems to know a lot about this area, and when he talked with Chen Xin, he was also gushing: "a few years ago, a national new district in Chang'an adopted this kind of deep geothermal well as a heating method, which is a successful case of China's utilization of deep geothermal resources. After that, high temperature dry hot rock was produced in Qinghai, and China is in the forefront of the world in this area."

"Is deep geothermal energy only used in China these years? But I remember when I was still in primary school, Yangbajing in Tibet province should have been built geothermal power generation, right? Isn't that deep geothermal development? " Chen Xin is a little strange. In his mind, Yang Bajing was very famous when he was still in primary school.

In the face of this problem, the person in charge shook his head with a smile, and then explained: "Yangbajing in Tibet province belongs to medium temperature shallow geothermal, where the geothermal resources are basically ready-made, and there is no need to drill deep wells to make use of it. However, Yangbajing's geothermal power generation is very early indeed. In the 1990s, megawatt geothermal power generation was realized, which is also a famous case of geothermal development. "

"I see. Shallow geothermal and deep geothermal are not the same thing." Chen Xin nodded clearly, quite a sense of sudden realization, but he then asked: "the high-temperature dry hot rock in Qinghai, is it of high utilization value? Is the country technologically mature in this area? "

Chen Xin is very concerned about this problem. If the country has ready-made technology, his idea of building energy towers to build greenhouses and even district heating fields will be easier to realize.

"Ha ha, that's the point you're asking!" For this problem, the person in charge seems to have been scratched to the itch. The whole person is excited. He adjusts his sitting posture and takes a sip of wine. Obviously, he plans to have a good talk with Chen Xin.

Chen Xin also made a serious attitude to listen, want to have a good understanding of this knowledge.

"For many years, the total amount of geothermal utilization in China has been the first in the world, but it mainly focuses on the utilization of shallow medium and low temperature geothermal. For deep geothermal resources, on the one hand, there is a lack of relevant technology, on the other hand, there is a lack of resource exploration. It is only in recent years that the country has made many breakthroughs in this regard." At this point, the person in charge sighed a little, not only sighed: "geothermal resources are good things! Its application cost is much lower than solar energy and wind energy, and it is clean and environmentally friendly, with huge reserves!

Especially in China, there are about 856 trillion tons of standard coal in the dry hot rock resources at the depth of 3-10 kilometers in the mainland, accounting for about 16% of the world's resources. It is a pity that China has not conducted research and development on this kind of energy before. Until the discovery of dry hot rock resources in the Qinghai Tibet Plateau, it fills the gap that China has not explored and discovered dry hot rock resources. "

"In this case, why didn't the state consider large-scale exploitation of dry hot rock and use deep geothermal to build shelters to avoid this crisis?" Chen Xin suddenly felt strange. According to the person in charge, it is easy to exploit the dry hot rock resources and the application cost is low. It is reasonable that the country should exploit them on a large scale. Why is it still burning coal now?

For this problem, the person in charge is a wry smile: "don't you want to be a country? The southern part of the Qinghai Tibet Plateau accounts for about 15% of the total dry hot rock resources in mainland China. The state plans to build planting and breeding areas in the Qinghai Tibet Plateau, and the plan is to use geothermal energy for heating and power generation. However, the construction environment on the plateau is too bad, and the plan is advancing very slowly.

Besides the Qinghai Tibet Plateau, the Songliao Basin, the Bohai Bay Basin and the southeast coast are all frozen by the rising sea level. In this case, it is very difficult to develop and apply the deep geothermal resources on a large scale. "

Hearing this, Chen Xin nodded clearly. The sea water has poured into Dongting Lake. Shandong Peninsula has become Shandong island. Now it is not very practical to develop geothermal resources in coastal areas.

However, although there are many difficulties in this aspect, the utilization prospect of deep geothermal is still broad.

Chen Xin thought about it seriously and then said, "since the country has the technology in this area, it should be no problem for me to use geothermal resources to build a greenhouse for planting, right?"

"That's hard to say." The person in charge shook his head and filled Chen Xin's glass with wine. Then he continued: "the deep geothermal technology currently used in our country is mainly used for the development of dry hot rock, that is, impermeable rock with no fluid or a small amount of fluid.Specifically, by injecting water into deep wells to develop fractures, a planar artificial dry hot rock heat storage structure is formed, and heat is extracted by recovering high-temperature water and steam. This technology requires the geological structure. In places like Hunan Province, where the groundwater resources are too rich, if you want to exploit the deep geothermal resources, you need to change the technology, but there are many problems! "

"Let me solve the technical problems. As long as I can put up the shelf, I can make it practical." Chen Xin didn't think it was a problem.

With the support of the system, it is not difficult to exploit the deep geothermal.

"I forgot Mr. Chen, what you are good at most is technical improvement!" The person in charge gave a smile, patted his head and made a promise: "since Mr. Chen, you have such an idea, I'm willing to give my full support. After that, I will reflect the situation with the higher authorities and strive to set up a pilot here. At that time, Mr. Chen will need you to improve the technology.

If this can be done, the development technology of deep geothermal resources can be popularized on a large scale, which will benefit the country and the people! "

"I'll wait and see!" Chen Xin raised his glass and touched the person in charge again.

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