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And these are also the problems that the project team encountered before.

Because the calculation is too complicated, the project team can only roughly estimate a result, and the error from the real situation cannot be accurately estimated.

Under such conditions, it is difficult to accurately find the most reasonable superconducting cable planning method.

"The calculation of the hysteresis loss of superconducting cables...is really a difficult problem."

Even Xu You must admit that this problem is not easy to solve.

Xu You tried it out, deriving such a formula through the skills of brain simulation.

But after many attempts, it didn't work.

Brain simulation can simulate various actual reactions very accurately.

But for the derivation formula, it does not have such a good effect.

Xu You decided to use the traditional method to deduce the formula.

"Let's determine all the influencing factors first."

After careful thinking, Xu You determined all the influencing factors that would affect the hysteresis loss.

"Magnetic permeability in vacuum, number of superconducting strips, frequency, critical current of superconducting strips, peak value of AC current, critical current degradation rate..."

After determining all the influencing factors, Xu You entered the state of deep learning and began to deduce.

Through continuous deduction, Xu You finally discovered that there are some wonderful logarithmic relationships hidden among these physical quantities.

"Construct a new physical quantity Fi, and then here and here, through the calculation of the natural logarithm, you can get the result of the hysteresis loss P..."

In the end, Xu You deduced a very complicated formula to calculate the hysteresis loss of superconducting cables.

Through experiments, it is proved that Xu You's derivation result is completely correct.

The calculated value is very close to the measured value, and the error is much smaller than the rough estimate of the previous project team.

Xu You also successfully deduced the corresponding formulas for the eddy current loss and the dielectric loss of the insulating layer.

Next, it is the turn of the body leakage heat loss of the superconducting cable.

In order for a superconducting material to achieve superconducting properties, it is necessary to keep the superconducting material at a lower temperature.

In this way, a large temperature difference will be generated inside and outside the insulation layer.

No matter how good the insulation effect of the insulation layer is, there will be heat transfer inside and outside the insulation layer.

Loss calculations at this point are also an essential part.

For this reason, it is necessary to measure the thermal conductivity of the insulation layer in detail, and calculate the most suitable cable specification according to the ambient temperature and the superconducting critical temperature.

Through a series of derivations, Xu You finally wrote down this one-line formula:

"P=2πk(T0-T)/ln(D2/D1)"

After the derivation was completed, Xu You couldn't help sighing:

"The formula for the heat loss of the main body is really simple and clear."

This is the formula with the simplest structure among the several formulas derived by Xu You.

After completing the measurement of the thermal conductivity of the insulation material, Xu You also obtained the best specifications for the insulation layer.

"The inner radius is 56mm, and the outer radius is 88mm. In this way, the loss of the original specification will be reduced by about 1%."

Reducing the loss by 1% may not seem worth mentioning.

But in long-term use, it will save a lot of energy.

In all the process, Xu You requires excellence and cannot underestimate any detail.

...

After completing all the formula derivations and calculations, Xu You obtained all the optimal conditions and calculated the overall loss of this new type of superconducting cable.

Xu You found Xing Shuping and explained his calculation results to Xing Shuping.

"Academician Xing, according to my calculations, if the optimal solution is used to lay superconducting cables, the energy loss is about 29.86% of conventional cables."

Hearing this number, Xing Shuping couldn't help being surprised.

"Professor Xu, is it really possible to achieve such a low energy consumption?"

You must know that the energy loss of the kilometer-level superconducting cables built in Shanghai is about 65.51% of that of conventional cables.

Calculated in this way, this new type of superconducting cable saves more than half of the energy compared with the previous superconducting cable.

"Through my calculations, this is indeed the case. Of course, in the specific performance, there must be some errors. This is also related to factors such as the actual ambient temperature."

Because the ambient temperature is changing every day and cannot be predicted accurately.

In terms of body heat leakage loss, it is definitely impossible to calculate very accurately.

In addition to the advantage of the relatively high superconducting critical temperature of the 202K material itself.

Xu You also optimized for various other conditions to the greatest extent.

To ensure that all losses can be controlled to the lowest level.

"Understood, the ambient temperature must not be accurately controlled, otherwise more energy consumption will be invested. Professor Xu, let's organize a meeting right away. If there are no problems, this plan is ready to be put into construction. "

Xing Shuping knew how significant the data calculated by Xu You was.

If in the future, we can replace all transmission cables from conventional cables to superconducting cables.

Can save about 70% of energy consumption.

This will have a decisive impact on a country.

In an era of increasingly scarce energy, this technology is undoubtedly revolutionary.

Under the organization of Xing Shuping, everyone immediately came to the meeting room and held a temporary meeting.

Undoubtedly, Xu You, as the core of the meeting, talked about the design and planning of his entire set of superconducting cables, as well as the calculation results.

Xu You's exquisite formula derivation and rigorous calculation conquered all the experts present.

After obtaining everyone's unanimous approval, Xing Shuping submitted the design plan upwards and got approval from his superiors.

So far, the world's largest and most efficient high-capacity superconducting cable will start construction in Jijing.

After helping the project team complete this task, Xu You immediately returned to Ji University, and didn't even attend the celebration banquet.

As for the bonuses and honors that Xu You would get through this project, Xu You didn't care at all.

To Xu You, this was a very empty thing.

But some experts do not have such qualities as Xu You.

After Chen Pingqiu finished the celebration banquet of the superconducting project team, he did not forget to continue to eat and celebrate with the teachers and students of his school's experimental team.

"Congratulations to Professor Chen for his project success and return to his alma mater!"

Other teachers and students in the laboratory toasted Chen Pingqiu to express their congratulations.

"Professor Chen, what is this project related to?"

"Hey, this is strictly confidential in the organization, so you can't just say it casually. When you should know, you will naturally know."

After drinking for three rounds.

Chen Pingqiu finally started to feel drunk.

The excitement caused by drunkenness made Chen Pingqiu even more elated.