my scientific age

Chapter 264 The real version of 'Tomorrow, the alma mater is proud of you'!
In the laboratory, Yu Hua was extremely attentive, holding a steamed bun with coarse grains in his left hand to replenish energy, and holding a pencil in his right hand. Without any drawing tools, he drew straight lines and symbols on the blank page of the special drawing to mark various design parameters.

At the top of this special drawing is written—[General Structure Drawing of [-]-Class Air Separation Plant Compressor].

Yu Hua draws while gnawing, and the drawings show the overall structure of the compressor that has been numerically calculated by the thinking computer. Performance design index of Taiwan air separation plant.

After being instructed by Professor Zhuang, Yu Hua returned to the laboratory and took out the compression structure. The entire turbo compressor integrates the design indicators and current processing conditions of the air separation plant. It adopts aero-engine-like compressor structure design. The second stage, the working pressure is 0.48 MPa, and the theoretical compression performance reaches 1200 cubic meters of air per hour.

Yes, secondary fans.

Limited by the material and manufacturing level, this two-stage turbo compressor has reached the limit of the current Chinese material and manufacturing level. If you want to use more series of fans, you must make a breakthrough in the material and manufacturing level. progress.

Unfortunately, this is not realistic.

Fortunately, the compression performance of the two-stage turbine-type compression structure conforms to the design index and is completely sufficient.

The upper limit of the piston compression structure may be only nearly [-] cubic meters per hour, but the turbine compression structure is different. Its lower limit is the upper limit of the piston compression structure.

The gap between the two, if you want to give the most intuitive example, is that of piston propeller aircraft and jet aircraft.

The reason why the oxygen production efficiency of the current air separation plants on the market is so low is inseparable from the extremely low efficiency and backward piston compression structure.

"The overall structure of the compressor is basically done. The air passes through the turbo compressor and the air cooling tower, the pressure reaches 0.5 MPa, and the temperature is about 303K. In order to improve the purity, a special air filter should be added here to cooperate with the air intake unit. The installed air filter filters air impurities and dust as much as possible, completes the purification step, and the air enters the heat exchanger for heat exchange and cooling..." Yu Hua glanced at the overall structure of the compressor of the air separation plant and confirmed that it was correct. Put it on the overall structure of the air separation plant: "What kind of condensing evaporator should be used in the heat exchange refrigeration system?"

The overall structure of the compressor The overall structure of the air separation plant is two different things. Compression is only the first step in oxygen production.

In order to improve the purity of oxygen, the pressurized air is firstly purified with high efficiency, and then the air is sent to the condensing evaporator for heat exchange. After heat exchange and cooling, it is finally sent to the air cooling tower for refrigeration and rectification. 99.95% high-purity oxygen can be obtained by distillation.

From a working principle perspective, it seems simple, right?

There is a feeling that I can do it.

However, regardless of the most technically difficult compressors, any condensing evaporator or air cooling tower can be blinded by experts and engineers in the field of air separation plants.

What is the internal structure, what is the operating mechanism and principle, what control method and detection method should be used, each is a technical problem.

The heat exchange and refrigeration system of the air separation plant is composed of the condensing evaporator to form the basic cooling unit, which is a technical problem that must be solved, and cannot make it a short board of the entire air separation plant subsystem.

The reality is so cruel. How much water a wooden barrel can hold does not depend on the longest board, but on the shortest board. If you want to fill it more fully, you must fill the shortest board.

The same is true for the air separation plant. All subsystems must meet the design targets of 1014 cubic meters of air per hour and 202.8 cubic meters of oxygen per hour.

Regarding this situation, Yu Hua is not afraid, his face is natural, his eyes are full of rationality, his mind composed of rationality and logic is running at high speed, thinking about the heat dissipation structure of the condensing evaporator.

Since the traditional condensing evaporator cannot meet the design specifications, a new heat dissipation structure must be adopted.

To innovate, you have to start from the most basic working principles.

The condensing evaporator is mainly used for the circulation of cold and hot fluids in each channel for heat exchange and refrigeration. In order to efficiently dissipate heat and cool down, this means that the condensing radiator must have sufficient heat dissipation area and better heat dissipation materials.

"The traditional heat dissipation structure is definitely not good, but I can use the air-cooled radiator of the computer CPU as a prototype, and use the structure of multi-layer plate fins and heat dissipation pipes. In this way, the heat dissipation structure will not increase the size of the heat dissipation area. It can be increased dozens of times.”

Yu Hua pondered carefully in his mind, and suddenly, a flash of light appeared in his mind, and the image of the computer air-cooled radiator in later generations appeared in his mind, which was the source of inspiration as the design idea of ​​​​the condensing evaporator.

heat sink!
The classic Xuanbing [-] radiator!

"In terms of thermal conductivity, silver has the highest thermal conductivity. However, the silver heat dissipation structure cannot be used according to the local area, so it can only choose between copper and aluminum. The advantage of copper is that the thermal conductivity is high, but the disadvantage is that the specific heat capacity is low, and a large air volume must be used. Fan or liquid cooling, the situation of aluminum is completely the opposite." With the design inspiration, after Yu Hua thought about the heat dissipation structure, he immediately thought about the problem of heat sink material.

Silver, copper, aluminum, the three brothers in the field of thermal conductivity, the oldest silver, the second copper, and the third aluminum, each of which has its own advantages.

The thermal conductivity of copper is as high as 400W/m·K, and the specific heat capacity is 386KJ/kg·K.

The thermal conductivity of aluminum is 237W/m·K, and the specific heat capacity is 900KJ/kg·K.

In terms of thermal conductivity, copper is almost double that of aluminum.

In terms of specific heat capacity, aluminum is almost three times that of copper.

From a cost point of view, aside from the fact that the two metals are strictly regulated and cannot be purchased in large quantities, copper is four times more expensive than aluminum in terms of theoretical prices alone.

As for the handle silver of the thermally conductive material, Emmm...

Silver has excellent material properties, the highest thermal conductivity, and a higher specific heat capacity than aluminum, which is a theoretically perfect heat sink material.

pity……

Can't afford it.

"Let's use aluminum. Although copper is good, this scarce metal resource can only be used on the edge of the blade, but copper must be used for the circulation pipes." Yu Hua weighed and considered and finally chose the third aluminum.

The structure and materials were preliminarily finalized. Without delay, Yu Hua took out a special drawing as quickly as possible to draw the detailed structure of the condensing evaporator.

On the drawing, the entire condensing evaporator looks very familiar. It is composed of multi-layer plate fins as the heat dissipation structure. The surface area of ​​each layer of aluminum plate fins is about 1.5 square meters, the total number is about 450 pieces, and the total heat dissipation area reaches [-] square meters. Meter.

For computer DIY enthusiasts, this is an oversized air-cooled radiator.

However, the use of this oversized air-cooled radiator is not the CPU, but oxygen.

The initial design structure on the drawings is presented. Yu Hua uses the thinking computer to build a mathematical model of the condenser-evaporator according to various parameters, and conducts simulation calculation tests.

After a few seconds, the entire simulation calculation test is over, and the test data shows that the condensing evaporator has reached the design index.

"If two sets of copper heat pipe channels are added in the middle, the heat dissipation efficiency should be further increased." Yu Hua touched his chin and was not particularly satisfied with the original version of the condensing evaporator. Added two sets of copper heat pipe channels.

This improvement does not increase the difficulty of manufacturing while improving the heat dissipation efficiency, which is barely a small innovation.

Soon, Yu Hua perfected the improved condensing evaporator and conducted the second simulation calculation test without stopping.

The second simulation calculation test data shows that the heat dissipation efficiency of the improved condensing radiator is 13.92% higher than that of the original version, and it can process 50 cubic meters of liquid oxygen and 200 cubic meters of liquid nitrogen per hour.

"Okay, with this design, the entire heat exchange refrigeration system only needs four basic units of condensing evaporators, two in groups, one for the low-temperature condensing system and one for the high-temperature evaporation."

After getting the test data, Yu Hua, who was about to run out of energy, wiped the sweat on his forehead, nodded with satisfaction, and decided to adopt an improved version of the condensing evaporator, which officially became the basic unit of the heat exchange and refrigeration system of the air separation plant.

I am in a happy and happy mood. In one day, I have completed the overall structure of the compressor and the structure of the condensing evaporator. The research and development progress is very gratifying.

According to such efficiency, as long as there are no mistakes, the air separation plant can be completed in about half a month.

If Professor Zhuang joins, it will take about ten days.

"Sometimes I really envy those colleagues who have a system. When a simple task is completed casually, the system father will immediately reward the artificial intelligence, and a novice gift package will be given at the beginning, and there will be a phased reward soon, giving a controllable nuclear fusion technology, It takes so much effort for me to toss a [-]-level air separation equipment..." A faint hint of dizziness came from his brain, Yu Hua rubbed his swollen temples, glanced at the structural design drawings of the condensing evaporator on the table, and suddenly recalled that he had seen Those novels I have read, I can't help but feel a sense of emotion in my heart.

People's time-travel is a novice gift package. The rewards are rich and drooling. You have what you want, and you live a rich and luxurious life. On the other hand, you eat whole grain steamed buns, drink cool white Kai, and toss a hundred-level air separation equipment. It is rare.

This man, sometimes, really can't compare.

However, with emotion, Yu Hua was still very satisfied with his journey.

Down-to-earth, never fantasize, use your own wisdom and knowledge to work hard for a bright future for China.

This experience is enough.

His energy was basically exhausted. Today's research and development work was over. Suddenly, Yu Hua seemed to have thought of something. He took out a silver dollar with a smooth metallic luster from his pocket and threw it into the sky.

Yuan Da turned his head up and rewarded himself for staying in bed for 30 minutes.

Otherwise, there is no reward.

"I'm lucky today, I can stay in bed legally." Seeing this result, the whole person smiled, and the mood became more and more happy, extremely comfortable, while humming a little song, while packing two design drawings.

It was not easy for Yu Hua, who had tossed silver coins only 2 times out of ten times, to stay in bed legally.

Put the two design drawings into the drawer, lock it, and simply clean the office with a broom tool. After finishing these trivial matters, Yu Hua turned around and went to the rest area, grabbed a change of clothes, and prepared to go downstairs to take a shower.

Peking in July has reached the hottest time of the year, and the weather is unbearably hot.

Fortunately, the nuclear physics laboratory has complete infrastructure and a separate bathroom for taking a cold shower. Yu Hua doesn't have to go to the school's large bathroom to meet frankly with his classmates.

From a personal physiological point of view, Yu Hua still doesn't quite adapt to the big bathhouses of this era.

Really can't stand it.

Just as Yu Hua was about to go downstairs, the office door suddenly opened. Before Yu Hua could react, a group of Tsinghua bosses including Principal Mei Yiqi and Master Hua Luogeng suddenly appeared in the field of vision.

"Uh... Principal, professors, what's the matter?" Looking at the group of people who suddenly appeared, Yu Hua, who was about to take a bath, was a little confused and asked carefully.

what's the situation?
Why did these Tsinghua giants suddenly come?

Mei Yiqi, Hua Luogeng, Zhuang Qianding, Xiong Qinglai, Yang Wuzhi and Zhao Zhongyao, there are a total of six, all of them are big bosses.

Yu Hua said that he just wanted to take a bath, so that such a trivial matter would not be able to disturb these Tsinghua giants.

Seeing Yu Hua's puzzled and confused expression, Mei Yiqi and a group of Tsinghua professors looked at each other and found the smiles in their eyes.

Aware of everyone's eyes and expressions, Yu Hua's eyes became more and more puzzled, and he was a little puzzled. At this time, Hua Luogeng in the crowd gave a hint.

Seeing the look in his master's eyes, Yu Hua instantly understood and seemed to understand what was going on.

Mei Yiqi, the nanny of Tsinghua University, took a step forward and came to Yu Hua with a smile on his face, and stretched out his right hand: "Student Yu Hua, we are here to congratulate you, the paper you and Professor Hua jointly signed. , appeared on the front page of the Princeton University Mathematics Annual Report, as the president, on behalf of National Tsinghua University, I would like to express my gratitude to you for your contribution to the field of Chinese mathematics, and you have brought glory to your alma mater."

There was a deep sense of love in the voice.

If Yu Hua, who was Hua Luogeng's apprentice, left a very good first impression on him when he was recruiting students for an interview, now Mei Yiqi's sense of Yu Hua has undoubtedly improved to a new level.

Mathematical genius, Tsinghua University recommended students, reported to the school in advance to study, made unprecedented breakthrough academic achievements, and added honor to National Tsinghua University.

This paper is not only of great help to Yu Hua, but even National Tsinghua University has followed suit.

Both the corresponding author of the paper and the first author of the paper are all from National Tsinghua University.

what is this?
Countless Chinese universities coveted honors.

This academic achievement made by Yu Hua may be something that no one else can achieve in a lifetime.

The most important thing is that Yu Hua is now in the prime time of being a scientific research talent. He can make academic achievements of this level now, which means that he will make more achievements of the same level or even higher level in the future. academic achievements.

This is the real version of 'Tomorrow, your alma mater is proud of you'!
Hearing Mei Yiqi's words, as expected, it was indeed due to the achievement of asymmetric cryptography. Yu Hua didn't have time to think about why the paper was published so quickly. He suppressed all kinds of thoughts in his heart and quickly stepped forward and extended his right hand: "Principal , you are overrated, the student just did a small thing, and it is not worthy of your treatment."

Principal Mei Yiqi is the man who single-handedly pushed National Tsinghua University to the top. He is known as the eternal principal of Tsinghua University. Yu Hua has no habit of pretending to be in front of such a person.

"This thank you is due. For the rest of my life, Tsinghua University is proud of you." Mei Yiqi smiled, and the address became more cordial.

Hearing this sentence, Yu Hua didn't know how to answer: "..."

He had never experienced such a scene, Mei Yiqi thanked himself personally, and also came to say that Tsinghua is proud of you.

This……

Yu Hua said he really didn't know how to answer the call.

"Yu Sheng, congratulations to you, sir only knows that your level of mathematics is very good, but I didn't expect that you have reached the level of a mathematician. This paper is very good." When Yu Hua was stunned, Professor Zhuang Qianding came up with a sullen face. He smiled, stretched out his right hand towards Yu Hua, and sent his personal congratulations.

"Thank you, Professor Zhuang." Yu Hua regained his senses and hurriedly stretched out his right hand.

The two right hands were tightly clasped together and then released naturally.

Zhuang Qianding smiled, blinked, and said softly, "I will come over tomorrow morning."

When Yu Hua heard the words, his pupils contracted violently, and he was stunned in place, looking at Professor Zhuang's figure, full of excitement and surprise.

The implication of this sentence is very clear, Professor Zhuang agreed, agreed to join the research project, agreed to go to the base...

Surprise!

This was a huge surprise!

Looking at Yu Hua's appearance, Zhuang Qianding smiled without saying much, and slowly stepped aside, leaving time and space to Yu Hua as the protagonist.

Now, it is the moment for Yu Hua, for this Tsinghua student.

"Yu Sheng, congratulations, your growth rate is astonishing, and your academic achievements are shocking." When Professor Zhuang Qianding retired, Professor Zhao Zhongyao did not play, and Professor Yang Wuzhi from the Department of Mathematics greeted him and stretched out his right hand with a smile. .

Yu Hua smiled and accepted Yang Wuzhi's congratulations, and reached out his hand to respond: "Thank you, Professor Yang."

"Maybe it won't be long before I call you Professor Yu Hua. After all, Professor Lefschetz and Professor Weyl call you that. They may not know that Yu Hua, who created the asymmetric cryptography, is just a student. , a freshman student." Yang Wuzhi joked.

(End of this chapter)