Galactic Tech Empire

Chapter 223 Vacuum
Huang Haojie is currently in the scientific research area, and the turmoil outside cannot affect him. As a company with technology as its core, Yinhe Technology will continue to climb the technological tree.

Vacuum Engineering Research Institute, this is a special research institute.

The vacuum pipeline of the Strait Bridge was developed here.

They have successfully produced a vacuum pipe with an inner diameter of 2 meters. Of course, a vacuum pipe of this level cannot be put into use.

The inner diameter of the pipe must be at least about 4 meters before it is initially practical.

As for the vacuum pipeline of the Strait Cross-Sea Bridge, the planned inner diameter of the tube is 6 meters, and there are a total of 6 double-tracks, 3 Pingtan-Hsinchu and 3 Hsinchu-Pingtan.

Among them, 2 are passenger lines, 2 are freight lines, and 2 are spare lines (can be used for special purposes).

Huang Haojie, Chen Wenfeng, the director of the institute, and Ma Sixing of the Academy of Sciences are looking at a section of the vacuum pipeline that has been built.

"Boss, this experimental vacuum pipeline has a total length of 500 meters. We have tested it many times. The sealing of the pipeline has met the standard. Now we are trying to test the inner diameter of the tube with a diameter of 6 meters." Chen Wenfeng patted the transparent vacuum pipeline wall.

"How much can the vacuum reach?" Huang Haojie looked at the vacuum pipe and asked.

Ma Sixing on the side explained: "The degree of vacuum has reached about 99.99%, and there is still one ten-thousandth of air remaining. This degree of vacuum is currently the maximum limit."

Huang Haojie nodded. In fact, there is no absolute vacuum environment in reality. Even in the universe, the so-called vacuum state is only relative.

Because there are all kinds of electromagnetic waves and particles in the universe, and according to the theory of wave-particle duality, electromagnetic waves are also a kind of matter, so the vacuum will not be empty, but there will be a lot of matter.

So now humans can only achieve a relative vacuum, not an absolute vacuum.

The 99.99% vacuum is already in a near-vacuum state, which has little effect on the maglev train running at a speed of 1200 kilometers per hour.

In fact, the experts and scholars of the Academy of Sciences did not need to achieve this near-vacuum state at the beginning. Their first stage is about 90% vacuum.

However, Yinhe Technology, which has a very strong material research and development capability, can make pipe materials with very good airtightness.

That being the case, just do it in one step, so as not to change it in the future.

The strength of the material not only improves the sealing performance, but also reduces the amount of work.At present, the vacuum pipeline with an inner diameter of 2 meters has a wall thickness of 23 centimeters.

As for the vacuum pipe with an inner diameter of 6 meters, Chen Wenfeng and his colleagues calculated that the pipe wall is between 73 and 75 centimeters. The exact thickness of the pipe wall can only be determined after the vacuum pipe is fabricated.

If reinforced concrete is used, it is similar to the hollow reinforced concrete ball of Hans's house. The wall thickness is less than 3 meters, and it cannot be done. If it is too thin, the atmospheric pressure outside will directly crush the pipe wall.

However, if reinforced concrete is used as the pipe material, assuming that the inner diameter of the pipe is 6 meters, the thickness of the pipe wall is required to be 3 meters.

Take the middle value of the pipe wall thickness of 1.5 meters, plus the inner diameter of the pipe of 6 meters, calculate the circumference of the reinforced concrete pipe, multiply the diameter of 9 meters by 3.14, and the circumference of the pipe can be obtained as 28.26 meters.

In this way, it is possible to roughly estimate how many cubic meters of reinforced concrete pipelines with a length of 135 kilometers are required.

The length is 135 kilometers, the thickness (height) is 3 meters, and the circumference (width) is 28.26 meters. Multiply the three numbers to get: 1144.53 million cubic meters.

While the price of ordinary reinforced concrete is 500 Chinese yuan per cubic meter, the price of reinforced concrete used to make vacuum pipes is at least double that.

In other words, for a 135-kilometer reinforced concrete vacuum pipeline, the material cost alone is 114.453 billion Chinese yuan.

In addition, due to the weight of the reinforced concrete pipeline, the load-bearing design of the bridge pier must keep up, otherwise it will not be able to support the huge weight.

With the use of FRP composite graphene, about 135 million cubic meters will be used for 215 kilometers, and the cost of one cubic meter of FRP composite graphene is about 2300 Chinese yuan, which is equivalent to the material cost of 135 kilometers of vacuum pipelines is about 50 billion Chinese yuan.

As long as the price is less than half, even considering the profit issue, raising the price to 70 billion Chinese yuan is still very promising.

What's more, the performance and service life of FRP composite graphene are much stronger than reinforced concrete.

In addition, the weight is only about one-fifth, which means that the load-bearing design of the bridge pier can also be reduced by two or three times, the load-bearing design of the bridge pier is reduced, and the cost is also reduced.

"Then I would like to trouble Academician Ma to continue the research and development, and Wenfeng, let's go and see the situation of the second institute." Huang Haojie said with a smile.

"It's your job, Mr. Huang, you are busy."

The second institute of the Vacuum Engineering Institute also studies vacuum, but their direction is different from that of the first institute.

Academician Ma just now is the project leader of the first institute, while Chen Wenfeng is directly in charge of the second institute.

Huang Haojie asked as he walked: "Where is your research and development progress?"

"The high-strength elastic film from the Materials Research Institute has been sent over. We have compounded the strong magnetic repulsion material and are currently testing it." Chen Wenfeng reported the progress to Huang Haojie.

The high-strength elastic film is the "High-strength Elastic Canvas" obtained by Huang Haojie before. The elasticity of this high-strength elastic film is amazing. It can be stretched thousands of times and then quickly return to its original shape.

The two entered the laboratory of the second institute.

"Boss, look, this is the high-strength elastic and strong magnetic repelling film we made according to your idea." Chen Wenfeng pointed to the back of the thick bulletproof glass.

Behind the bulletproof glass is a thin black string, the diameter of which is about the same as that of an ordinary ballpoint pen.

"Try it, I'll see what's going on."

"Ok."

Chen Wenfeng hurriedly arranged for the test, and after a while the black rope suddenly inflated, like an inflated balloon.

"Boss, look, this is the test report for the past few days." Chen Wenfeng handed over a document, and the balloon deflated after a while, returning to the state of the black rope.

Huang Haojie took it and flipped through the experimental test report:
"Is it possible to maintain the vacuum expansion state for more than 10 minutes?"

"Yes! We did an extreme violence test five days ago. Without considering the service life of the material, it can maintain the vacuum expansion state for nearly 164 minutes." Chen Wenfeng explained.

Huang Haojie touched his chin and thought for a while, then glanced at the black rope again.

"The current vacuum expansion diameter is about 15 meters. Wenfeng, you all try to move to a larger expansion diameter as soon as possible. My goal is to have a vacuum expansion diameter of about 200 meters."

"We will arrange it as soon as possible, but boss, we are afraid that the power supply of the research institute will not be able to keep up, and the test site will not be able to accommodate it." Chen Wenfeng quickly reflected some problems.

"Let's do this! I'll let the management committee of the Institute build two experimental bases in Bazhong City, Shu Province, and Kaohsiung City, Dongdao Province, respectively, for your two institutes to use." Huang Haojie made two bases with a stroke of his pen.

grunt!Chen Wenfeng was also shocked by the boss's wealth and importance.

"I will definitely let the people in the institute complete the goal as soon as possible."

"Well! In addition, you need to estimate if the diameter of the vacuum expansion is 200 meters, what is the diameter of the rope core? What is the weight per kilometer?" Huang Haojie then ordered.

"Boss, can I ask how long this cable is?" Chen Wenfeng asked cautiously.

"At least 200 kilometers. If it can be 300 kilometers, it is best. In addition, when the vacuum expansion diameter of 200 meters can be maintained, the unit weight of the cable should be minimized." Huang Haojie said the request.

"Boss, if you want to use this cable as a vacuum pipe for the Strait Cross-Sea Bridge, I'm afraid the time to maintain the vacuum state is not enough. After all, the train needs to run for a long time." Chen Wenfeng quickly reminded.

"I have my own plan, you guys complete the R&D design as soon as possible." Huang Haojie didn't explain anything.

"Alright then!" Chen Wenfeng could only nod helplessly.

(End of this chapter)