Chapter 264 The real version of ‘Tomorrow, your alma mater will be proud of you’
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In the laboratory, Yu Hua was extremely focused, holding a coarse-grain steamed bun in his left hand to replenish energy, and holding a pencil in his right hand. Without using any drawing tools, he drew straight lines and symbols on the blank pages of the special drawings to mark various design parameters.
At the top of this special drawing, there are words - [Overall structural drawing of compressor of 100-level air separation equipment].
Yu Hua was drawing while chewing. The drawing showed the overall structure of the compressor calculated numerically by a thinking computer. The air intake unit + turbine compressor unit composed of a two-stage centrifugal compressor and a turbine constitute the overall structure of the compressor, which can meet the needs of the entire compressor.
Performance design indicators of Taiwan air separation equipment.
After receiving Professor Zhuang's instructions, Yu Hua returned to the laboratory and took out the compression structure. The entire turbine compressor integrated the design indicators and current processing conditions of the air separation equipment, and adopted an aero-engine compressor structural design and fan stages.
Level two, the working pressure is 0.48 MPa, and the theoretical compression performance reaches 1,200 cubic meters of air per hour.
Yes, secondary fan.
Limited by materials and manufacturing levels, this two-stage turbine compressor has reached the current limit of Chinese materials and manufacturing levels. If you want to use more stages of fans, you must achieve a breakthrough in materials and manufacturing levels.
progress.
Unfortunately, this is not realistic.
Fortunately, the compression performance of the two-stage turbine compression structure meets the design specifications and is completely adequate.
The upper limit of the piston compression structure may be only nearly one thousand cubic meters per hour, but the turbine compression structure is different. Its lower limit is the upper limit of the piston compression structure.
If we want to give the most intuitive example of the gap between the two, it is piston propeller aircraft and jet aircraft.
Why is the oxygen production efficiency of air separation equipment currently on the market so low? The reason is inseparable from the extremely low efficiency and backward piston compression structure.
"The overall structure of the compressor is basically completed. After the air passes through the turbine compressor and 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 needs to be added here to cooperate with the air intake unit
The air filter is set up to filter out air impurities and dust as much as possible. After completing the purification step, 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 equipment and confirmed that it was correct. He turned around and looked at it.
Regarding the overall structure of the air separation equipment: "What structure of condensing evaporator should be used in the heat exchange refrigeration system?"
The overall structure of the compressor and the overall structure of the air separation equipment are two different things. Compression is only the first step in oxygen production.
In order to improve the purity of oxygen, the pressurized air must first be efficiently purified, and then sent to the condensation evaporator for heat exchange. After heat exchange and cooling, it is finally sent to the air cooling tower for refrigeration and distillation. After deep and low temperature purification,
Through distillation treatment, 99.95% high-purity oxygen can be obtained.
From the perspective of working principle, it seems very simple, right?
There is a feeling that I can do it even if I am.
However, regardless of the most technically difficult compressor, any one of the condensing evaporator and air cooling tower can make experts and engineers in the field of air separation equipment blind.
What is the internal structure, what are the operating mechanisms and principles, what control methods and detection methods should be used, each is a technical problem.
The heat exchange and refrigeration system of the air separation equipment consists of the condensing evaporator as the basic heat dissipation unit. This is a technical problem that must be solved and cannot make it a shortcoming of the entire air separation equipment subsystem.
The reality is so cruel. How much water a barrel can hold does not depend on the longest board, but on the shortest board. If you want to fill it fuller, you must make up the shortest board.
The same is true for air separation equipment. All subsystems must meet the design specifications of 1014 cubic meters of air per hour and 202.8 cubic meters of oxygen per hour.
Regarding this situation, Yu Hua was not afraid. His face was natural, and his eyes showed rationality. His mind composed of rationality and logic was 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.
If you want to innovate, you have to start from the most basic working principles.
The condensing evaporator is mainly used for heat exchange and refrigeration by circulating hot and cold fluids in each channel. In order to efficiently dissipate heat and refrigeration, this means that the condensing radiator must have sufficient heat dissipation area and better heat dissipation materials.
"The traditional heat dissipation structure will definitely not work. However, 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 can increase the heat dissipation area without increasing the size.
It can be improved dozens of times.”
Yu Hua thought carefully in his mind, and suddenly, an idea suddenly appeared in his mind. The appearance of the air-cooled radiator of later generations of computers came to mind, and he used this as a source of inspiration to design the condensing evaporator.
heat sink!
Classic Xuanbing 400 radiator!
"In terms of thermal conductivity, silver has the highest thermal conductivity. However, the base cannot afford a silver heat dissipation structure, so we can only choose between copper and aluminum. The advantage of copper is its high thermal conductivity, but its disadvantage is its low specific heat capacity, which requires large air volume.
Fan or liquid cooling, the situation with aluminum is completely opposite." With the design inspiration, Yu Hua immediately thought about the heat sink material after thinking about the heat dissipation structure.
Silver, copper, and aluminum are the three brothers in the field of thermal conductivity. Silver is the oldest, copper is the second, and aluminum is the third. Each of the three materials 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 twice that of aluminum.
In terms of specific heat capacity, aluminum is almost three times that of copper.
From a cost perspective, aside from the fact that the two metals are strictly controlled and cannot be purchased in large quantities, in terms of theoretical price alone, copper is four times more expensive than aluminum.
As for the thermal conductive material, Emmm...
Silver has excellent material properties, the highest thermal conductivity, and a higher specific heat capacity than aluminum. This 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 cutting edge, but the circulation pipes must use copper." Yu Hua weighed and considered it, and finally chose Laosan Aluminum.
After the structure and materials were initially finalized, Yu Hua did not delay and 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 a heat dissipation structure. The surface area of each layer of aluminum plate fins is about 1.5 square meters. The total number is about 300 pieces, and the total heat dissipation area reaches 450 square meters.
rice.
For computer DIY enthusiasts, this is an oversized air-cooled radiator.
However, this oversized air-cooling radiator is not used for the CPU, but for oxygen.
The initial design structure on the drawing was presented. Yu Hua used the thinking computer to construct a mathematical model of the condensing evaporator based on various parameters and carried out simulation calculation tests.
After a few seconds, the entire simulation calculation test ended, and the test data showed that the condensing evaporator reached the design specifications.
"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. He was not particularly satisfied with the original version of the condensing evaporator. He thought there was room for improvement, and then placed a key in the middle of the evaporator.
Two sets of copper heat pipe channels have been added.
This improvement improves heat dissipation efficiency without increasing manufacturing difficulty, which is barely considered a small innovation.
Soon, Yu Hua perfected the improved condensing evaporator and carried out 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 improved by 13.92% compared with the original version, and it can handle 50 cubic meters of liquid oxygen and 200 cubic meters of liquid nitrogen per hour.
"Okay, using this design, the entire heat exchange refrigeration system only needs four basic units of condensation and evaporator, two in a group, one group as a low-temperature condensation system, and one group as a high-temperature evaporation system."
After getting the test data, Yu Hua, who was about to run out of energy, wiped the sweat from his forehead, nodded with satisfaction, and decided to use an improved version of the condensing evaporator, which officially became the basic unit of the heat exchange and refrigeration system of the air separation equipment.
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 this efficiency, as long as nothing goes wrong, the air separation equipment 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 systems. If they complete a simple task, the system dad will immediately reward the artificial intelligence. At the beginning, a gift package for beginners will be given. Not long after, there will be a phased reward, giving controllable nuclear fusion technology.
It takes so much effort for me to work on a hundred-level air separation equipment..." There was a faint feeling of dizziness in his brain. Yu Hua rubbed his swollen temples and glanced at the structural design drawing of the condensing evaporator on the table. Suddenly he recalled that he had seen it before.
After reading these novels, I can’t help but feel a sense of emotion in my heart.
For others, traveling through time travel is like a gift package for newbies. The rewards are so generous that they are drool-worthy. You can get whatever you want, and live a rich and luxurious life. On the other hand, when you look back at yourself, you eat coarse grain steamed buns, drink cold drinks, and even a hundred-level air separation equipment is hard to come by.
This person, sometimes, really can't be compared.
However, it is a sigh of relief that Yu Hua is still very satisfied with his time travel.
Keep your feet on the ground, never have illusions, and use your wisdom and knowledge to strive for a great future for China.
This experience is enough.
The energy was basically exhausted and today's research and development work was over. Suddenly, Yu Hua seemed to have thought of something. He took out a smooth and metallic silver dollar from his pocket and threw it into the sky. The silver dollar fell into the palm of his hand with the pattern of Yuan's head facing up.
Yuan Da turned his head upside down 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, his mood became more and more joyful, and he was extremely comfortable, humming a little tune while packing up two design drawings.
Staying in bed legally was not an easy task for Yu Hua, who had thrown a silver coin ten times and only got two heads.
He put the two design drawings into the drawer, locked it, and took a broom tool to briefly clean the office. After handling these small things, Yu Hua turned to the rest area, picked up a change of clothes, and prepared to go downstairs to take a shower.
July in Peiping has reached the hottest time of the year, and the weather is unbearably hot.
Fortunately, the nuclear physics laboratory has complete infrastructure and a private bathroom with a cold shower, so Yu Hua does not have to go to the school bathhouse to meet his classmates candidly.
From a personal physiological point of view, Yu Hua is still not very adaptable to the big bathhouses of this era.
I really can't stand it.
Just as Yu Hua was about to go downstairs, the office door suddenly opened. Before Yu Hua could react, President Mei Yiqi, Master Hua Luogeng and a group of Tsinghua bigwigs suddenly appeared in view.
"Uh... Principal, professors, what's the matter?" Looking at the sudden appearance of this group of people, Yu Hua, who was about to take a shower, was a little confused and didn't know what was going on, so he asked cautiously.
What's going on?
Why did these Tsinghua giants suddenly come?
Mei Yiqi, Hua Luogeng, Zhuang Qianding, Xiong Qinglai, as well as Yang Wuzhi and Zhao Zhongyao, there are six of them, all of them are big bosses.
Yu Hua said that he just wanted to take a shower, and it was unlikely that such a trivial matter would alarm these Tsinghua giants.
Seeing Yu Hua's puzzled and confused expression, Mei Yiqi and the other Tsinghua professors looked at each other and noticed the smile in his eyes.
Aware of everyone's gazes and expressions, Yu Hua's eyes became more doubtful and somewhat puzzled. At this time, Hua Luogeng in the crowd gave a look and gave a hint.
Seeing the look in his master's eyes, Yu Hua understood instantly and seemed to understand what was going on.
As the nanny of Tsinghua University, Mei Yiqi took a step forward and came to Yu Hua. With a smile on her face, she extended her right hand: "Classmate Yu Hua, we are here to congratulate you on the paper signed by you and Professor Hua."
, appeared on the front page of the Princeton University Mathematics Annual Report. As president, on behalf of National Tsinghua University, I would like to express my gratitude for your contribution to the field of mathematics in China. You have brought glory to your alma mater."
There was a deep sense of affection in his voice.
If Yu Hua, Hua Luogeng's apprentice, left a very good first impression on him during the interview for recommended students, then Mei Yiqi's sense of Yu Hua has undoubtedly been raised to another level now.
A mathematical genius, a recommended student of Tsinghua University, he reported to school early to study, made unprecedented breakthrough academic achievements, and added honor to National Tsinghua University.
This paper not only greatly helped Yu Hua, but also National Tsinghua University followed suit.
Both the corresponding author and the first author of the paper are all from National Tsinghua University.
What's this?
An honor coveted by countless Chinese universities.
The academic achievements made by Yu Hua may be something that others cannot achieve in their lifetime.
The most important thing is that Yu Hua is only eighteen years old now and is in the golden period among scientific research talents. He can make academic achievements of this level now, which means that he will make more achievements of the same level or even more in the future.
Higher level academic achievements.
This is the real version of ‘tomorrow, your alma mater will be proud of you’!
After hearing Mei Yiqi's words, it turned out that it was indeed the result of asymmetric cryptography. Yu Hua didn't have time to think about why the paper was published so quickly. He suppressed all the thoughts in his heart and quickly stepped forward and stretched out his right hand: "Principal
, you are exaggerating, the student just did a very small thing and does not deserve to be treated like this."
President Mei Yiqi was the man who single-handedly pushed National Tsinghua University to its peak, and was known as the eternal Tsinghua President. Yu Hua had no intention of showing off in front of such a figure.
"This thank you is appropriate. For the rest of my life, Tsinghua University is proud of you." Mei Yiqi smiled, and the title became more cordial.
Hearing this sentence, Yu Hua didn't know how to respond: "..."
He had never experienced such a scene. Mei Yiqi thanked him personally and said, "Tsinghua University is proud of you."
this……
Yu Hua said he really didn’t know how to answer the call.
"Yu Sheng, congratulations to you. Sir, I only knew that your mathematics level 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 and said with a smile on his face.
He smiled, stretched out his right hand towards Yu Hua, and sent personal congratulations.
"Thank you, Professor Zhuang." Yu Hua came to his senses and quickly extended his right hand.
The two right hands were held together tightly, and then released naturally.
Zhuang Qianding smiled, blinked, and said softly: "I will come over tomorrow morning."
When Yu Hua heard this, his pupils contracted violently and he froze on the spot, 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, and agreed to go to the base area...
surprise!
This was a huge surprise!
Looking at Yu Hua's appearance, Zhuang Qianding smiled and slowly stepped aside without saying a word, leaving time and space to Yu Hua as the protagonist.
Now is the moment that belongs to Yu Hua, the moment that belongs to this recommended student of Tsinghua University.
"Yu Sheng, congratulations to you. Your growth rate is astonishing, and your academic achievements are shocking." After Professor Zhuang Qianding left, Professor Zhao Zhongyao did not come on the stage. Professor Yang Wuzhi from the Department of Mathematics came to greet him, smiling and extending his right hand.
.
Yu Hua accepted Yang Wuzhi's congratulations with a smile and extended his hand to respond: "Thank you, Professor Yang."
"Perhaps it won't be long before I call you Professor Yu Hua. After all, Professor Lefshetz and Professor Weyl both called you this. They may not know yet that Yu Hua, who created the asymmetric cryptography achievement, is still just a student.