International students returning to 90

"PE plastics, XLPE plastics, and ethylene-propylene rubber have good electrical and mechanical properties at room temperature, but in low-temperature environments, their dielectric loss and partial discharge are significantly lower than those at room temperature, and their mechanical properties drop significantly."

Lin Yi was constructing the structural parameters of the cable, and Zhuang Cheng took the initiative to undertake the test experiment of insulating material selection. He Qun and others did it. He corrected the test plan and recorded the data, and beautiful and intuitive curves soon appeared in his pen.

"So, I suggest choosing PPLP material as the low-temperature main insulation material for this project." Zhuang Cheng put the experimental data and conclusions next to Lin Yi.

Lin Yi's hands fluttered on the keyboard, and a three-dimensional model picture appeared on the computer screen. The surprise on Zhuang Cheng's face could not be concealed, "What is this?"

"The 3D model is a small program I made myself. Some common-sense screening conditions cannot be imagined by the brain alone. Using it can be eliminated very intuitively."

There are some arguments in the society that scientists work behind closed doors and don't know the world affairs, and they really haven't been wronged.Many scientific researchers are masters and experts in their own fields, but they have less common sense than ordinary college students in their majors.

Lin Yi saw such an interesting incident in his last life. When a researcher in materials engineering was upgrading optical fiber products, in order to increase the transmission speed of optical signals to a greater extent, he chose a single-film optical fiber core with a diameter exceeding the conventional one. .

This is normal for scientific researchers, and the best performance has always been their goal.

But the bad thing is that this fiber optic broadband is used in every household. Your product has good performance and high speed, but you can't replace all the fiber optic equipment in the whole country in order to promote new products.

This is completely worth the candle!

This matter had a great impact on the material science circle at that time. These top scholars held a special meeting for this and made a deep reflection. Lin Yi's program was made after that meeting.

"You see, for example, the diameter of the copper stranded wire, according to the general experimental thinking, will do equidistant growth tests within the possible range, just like the order I just issued. But I did not consider the shape of the US power grid, interfaces, etc. objective facts that already exist.”

"Now, I add these conditions as selected conditions, and the program will automatically filter out unreasonable simulation conditions."

While Lin Yi was talking, he entered a series of codes, Zhuang Cheng's eyes sparkled, and he even breathed lightly.

After losing all the conditions, Lin Yi straightened up slightly, smiled and looked at the serious Zhuang Cheng beside him, "Professor Zhuang, shall we press Enter together?"

"it is good."

"One, two, three, press" Press the Enter key with two fingers at the same time, and then a series of codes flashed on the computer screen. After about 5 minutes, two numbers "20, 24" appeared

"Look, this way the workload will be saved by half." Lin Yi seemed a little proud that this small program was his original creation.

"You are really amazing." Zhuang Cheng said sincerely, Lin Yi is the most talented and creative scientific researcher he has ever met, bar none.

Lin Yi was startled, and turned to look at Zhuang Cheng, just as Zhuang Cheng was also looking at him, the eyes of the two met in the air, Lin Yi saw the seriousness and sincerity in Zhuang Cheng's eyes, for a moment, there seemed to be colorful fireworks Bursting out from his heart, it was astonishingly brilliant.

Zhuangcheng looks really good up close.

It is obvious that the five sense organs are not amazing when they are put together, but they do not have a handsome and gentle taste. Each of the five sense senses looks more like a piece of exquisite art when taken out alone.

At this time, his waist should not be so thin, I don't know if I can still lift one hand.

After realizing what he was thinking, Lin Yi's face froze, and he coughed a few times to cover up his guilty conscience.

"Ahem, He Qun, adjust the diameter data of copper strands, just measure 20 and 24!" He said loudly to He Qun at the other end of the room.

"What about 16, 28, 30?" He Qun asked subconsciously.

"Your brain has been gnawed by zombies. I have already said to adjust the parameters. Of course, there is no need for these!"

He Qun looked at the researcher who was emotionally unstable, swallowed the word "why" silently, and adjusted the parameters obediently.

Zhuang Cheng is worthy of being a master of theory. With his participation, everyone processed the data a lot more easily. In just three days, the optimal parameters were calculated.

Copper stranded wire: 24mm in diameter

Copper strip: 4mm wide, 0.2mm thick

PPLP: 40 mm wide, 0.1 mm thick

Carbon paper: 30 mm wide, 0.12 mm thick

Polyimide tape: 30 mm wide, 0.02 mm thick

"Ahem, professor, look." Lin Yi pushed the final parameter data from the table to Zhuang Cheng without looking at anyone.

Zhuang Cheng didn't care about these details, and flipped through them a little, "I have no objection."

"Under these parameters, I can guarantee that there is no problem with the 5-meter-long superconducting cable. If the length increases, I cannot guarantee the stability of the superconducting cable."

"You have done a better job than I imagined, and my work will follow. Theory guides practice, and practice counteracts the progress of theory. I think we can cooperate very happily." Zhuang Cheng said with a smile.

Lin Yi lowered his head and pursed his lips, he was still guilty.However, Lin Yi is an excellent researcher after all, and soon he adjusted his state and announced the next step of the experiment.

The target parameters are given by Zhuangcheng.

Voltage level: 110V

Power-on current: 3KA

Short circuit current: 25KA

Circuit current action time: 1S

Cable length: 75m

So far, among the superconducting power transmission technologies disclosed all over the world, the longest cable length is a 20-meter-long, 12.5KV/1.25KA cold-insulated three-phase high-temperature superconducting cable developed by Southwire Company of the United States. This target parameter can not help but be staggering.

This is why Zhuangcheng's paper at that time attracted such great attention, because if it is proved that Zhuangcheng's experimental results are not accidental, but can be replicated on a large scale, then the cable industry will usher in a subversive revolution.

Not only that, this theory can be applied to superconducting cables, but what about superconducting motors?Even the entire power system will usher in a revolutionary breakthrough!

"Andre, feel my heartbeat, isn't it beating very fast?" Qiao Sen swallowed and said nervously.

"Yes, it's about to jump out of my chest, oh! God, I must have saved the earth in my previous life, otherwise how could I be so happy to participate in this great project."

Xu Dongkui was short of breath, he looked at Lin Yi and Zhuang Cheng, his eyes were full of fanaticism, Chinese, they are Chinese just like himself!

Not only these little assistants, but even Zhuang Cheng was completely excited, even more excited than when he first came to the conclusion of the experiment, because he knew that maybe they could really do it and put his theory into practice .

When Zhuangcheng proposed this theory and successfully tested it, he invested nearly 3000 million U.S. dollars, but the production of superconducting cables cost nearly ten million U.S. dollars. The development of conductive cables provides directional guidance, but it is completely impossible to apply them to the market.

But as the experiment progressed, Lin Yi tested and screened again and again. He roughly calculated that if the next experiment can be successful, the cost of this superconducting cable is completely within the acceptable range of the market.

He has even imagined the madness of the capital market after the project results come out.

He and Lin Yi will become the golden hens chased by the capital market. Of course, this is not his goal, but with the technology at hand and the right to speak, he can do more things.

"Andrei, is the winding equipment ready?"

"The warm-up has been completed, and you can start the experiment at any time!" Andri immediately replied loudly, his nervous appearance was different from He Qun's usual posture, which made Lin Yi look up at him involuntarily.

"Okay, change the place and start cable winding!"

"How much rice?"

"Professor Zhuang didn't give the target parameters anymore, we will strive to achieve it in one step!"

Lin Yi's tone of course made Zhuang Cheng look at him twice.

The winding equipment is not a high-precision equipment, so in order to save the budget, the procurement center purchased relatively new second-hand equipment-integrated winding equipment after obtaining Lin Yi's permission.

The integrated winding equipment can sequentially wind multilayer superconducting tape, semiconducting layer, multilayer main insulating layer, multilayer superconducting tape shielding layer and protective layer on the flexible support skeleton of copper stranded wire. convenient.

It is more labor-intensive.

This is why Lin Yi asked He Qun to call people. This kind of strenuous work can't be done by himself as a researcher. Of course, Professor Zhuang can't do it either.

These little assistants were very happy, and thought that their own value had been fully reflected, and they had contributed their own strength to this great project, so they were extra proactive.

"After winding the 75-meter cable, today's work ends here. Combine work and rest, work and rest. You researchers, I am not a capitalist who exploits people."