Chapter 894 Satellite Bug
Zang San also accepted his fate. After all, it is very difficult to train air force pilots.

Our Air Force on the Peninsula battlefield: Actually it’s not that bad, at least we’re not unable to fight.

Even if the Americans and Russians replenished the planes, it was difficult to get pilots. This was the main reason why their air force withdrew. If this group of people were killed, it would be too late for the new batch to grow up.

In comparison, they are much more confident in the army. After all, they had fought against Emperor Buddha with John Bull and Gallicus in the past, so they are full of confidence.

When it comes to shooting, as long as the target hits the target, it's fine. Why think so much? A wallet license is also a driver's license.

All these disturbances had no effect on Gao Zhendong. When he saw 21:0 in the newspaper before going to work, he grinned like a fool.

Lou Xiao'e, who was still taking care of Gao's siblings, almost took him back and sent him to the hospital. Zhendong's condition was too abnormal.

Gao Zhendong was riding a bike, and the amplitude of the swing of his body when pedaling was obviously much larger than usual, and it was obvious that he was in a very proud mood.

"Chief Engineer Gao looks like he's in a very good mood when he rides his bike," said a comrade following behind him with a smile.

"Of course, if it were you, you would twist your bike more violently than him." Another person agreed while pedaling hard. When Chief Engineer Gao was in a good mood, he would ride very fast. It was very difficult to keep up with him. I don't know how he trained, because I don't usually see him exercising.

Gao Zhendong himself kept repeating "21:0" in his mouth. He said confidently that this 21:0 must be the result of his hard work.

This record will surely go down in our history, and will forever nail Zang San to the pillar of shame.

At this moment, he felt that everything was worth it.

He even imagined in his mind how his comrades fought in the air and how panicked the enemy was. When he was happy, he bent down and pedaled hard, as if the cold wind was blowing in his face and he was flying in the air.

As a man, which one has not dreamed of flying a plane?

This made the comrades behind very uncomfortable and too tiring.

Fortunately, Gao Zhendong had already ridden to the factory, which allowed them to put aside the idea of ​​calling on their comrades for support.

As soon as he entered the office, a comrade from the confidential office of the Third Factory came to find him.

"Chief Engineer Gao, the Defense Work Committee called. Several comrades are coming to see you."

"Well, okay, you make the arrangements, and notify me when the person has arrived and the formalities have been verified." The Defense Work Committee called specifically to notify me, so it must be an important matter.

It is estimated that the other party had already set off before the Defense Work Committee even called. Gao Zhendong had only sat down for a few minutes when they arrived.

When Gao Zhendong saw the people coming, he felt that they looked familiar. He didn't know the others very well, but he still remembered the leader. It seemed that he had seen him when they were discussing satellites.

Did they come to ask for solar panels? NiMH batteries only provide ideas and technology, but they don’t make them here. However, Tang Shaohui is working on solar panels.

"Hello, comrades. Are you here this time for the satellite power supply issue?" Gao Zhendong greeted them proactively.

The visitor did not expect Gao Zhendong to have such a good memory and was stunned for a moment: "Hello, Mr. Gao, let me introduce myself, my last name is Zhu. The power supply issue is not urgent now. There are other DC power supplies of the same specification for satellite power supply simulation, which has no impact on research and development. The research on satellite camera payload is also going smoothly. We are here this time for other things."

He only said his last name and nothing else, and Gao Zhendong didn't care. Anyway, the comrades from the internal security department were verifying it, so he didn't have to worry about other problems.

Gao Zhendong thought about it and felt that based on what was decided in the previous meeting, there seemed to be nothing else he needed to do.

However, this is not uncommon as his fame and status within the system change.

"Engineer Zhu, is it materials or electronic systems this time?" Gao Zhendong asked with a smile.

"Well... strictly speaking, the two are related." Engineer Zhu said. After that, he took out a document and began to explain the situation to Gao Zhendong.

"…This is the situation. According to our calculations, the temperature of the satellite in space may be as low as minus 100 degrees Celsius. We came here because you are an expert in computers, electronics, and materials. We want to verify with you whether the electronic system can work normally at this temperature. If not, what kind of measures or material replacements are needed to make it work normally?"

After hearing his question, Gao Zhendong thought about it, but his words were far beyond the expectations of Zhu Gong and others.

"At more than 100 degrees below zero, the electronic system will definitely not work properly, but this is not a big problem. On the contrary, I think that compared with low temperature, you should consider the problem of high temperature, how to dissipate heat, and how to achieve thermal balance. These are the issues you should consider."

Gao Zhendong's words immediately stunned Zhu Gong, who had already spread out the paper and pen.

This is not a simple problem. If we consider heat dissipation, many of the previous designs will be in vain. But space is obviously very cold.

"Mr. Gao, we all know that space is very cold..." Mr. Zhu chose his words carefully, fearing to hurt Gao Zhendong's self-esteem.

But before he could finish, Gao Zhendong took over the conversation: "Well, I know, generally speaking, if we don't consider special astronomical structures, the lowest can be less than 3K."

Space is very cold, but under normal circumstances it will not be colder than the cosmic microwave background radiation of 2.725K. Of course, some special celestial bodies or astronomical structures will be colder than this, such as the Boomerang Nebula in the Milky Way, where the temperature can reach 0.5K. The cooling principle here is a bit like the vortex tube refrigerator that Gao Zhendong developed for the Institute of Guidance and Research, which uses high-speed expansion of gas for cooling.

Gao Zhendong's words made Zhu Gong stunned for a moment: "Ah, Mr. Gao also studies astronomy, he is multi-talented, haha."

Research? Cosmic microwave background radiation, isn't this popular science knowledge in the field of astronomy? If knowing this thing is considered as research in astronomy, then there are a lot of people doing research.

No! Gao Zhendong took two chances to search for materials and found a problem.

Shit, this thing hasn’t been confirmed in 62 years!
Fortunately, he just vaguely said a number less than 3K, which is consistent with the data someone once imagined. If he had said 2.725 exactly, it would have been a lot of fun!

Gao Zhendong didn't dare to go into detail on this issue and almost blurted out: "It's not really research, but I guess reading some miscellaneous knowledge counts."

Engineer Zhu smiled and said, "Well, since Mr. Gao knows, then it's easy to deal with. With such a low temperature, even if it's above the earth and not in deep space, the actual temperature is still very low. There should be no need to consider heat dissipation, right?"

Gao Zhendong understood that this was a somewhat brain-teasing question that many people would make, and it was even more common in some science fiction and space movies and TV shows.

He thought about it and gave an example.

"Engineer Zhu, I know it's very cold in space, but you have used a thermos before, right? And don't forget that electronic systems generate heat."

Thermos, the full name should be vacuum thermos, not vacuum flask. This thing can keep warm or cold, and actually it maintains temperature.

"Thermos? Vacuum...heat..."

Engineer Zhu frowned and thought for a long time, then slapped his thigh.

"Oh no! I forgot about this! Chief Engineer Gao, thank you so much! Thank you so much!"

There is no air in space, in fact there is no medium, so convection heat dissipation is useless and we can only rely on radiation heat dissipation. However, the efficiency of radiation heat dissipation is relatively poor, which will cause a problem.

Where the sun shines, the temperature can reach over 100 degrees!

On the side that is not exposed to the sun, the temperature can drop to more than 100 degrees below zero.

It's easier to deal with just the sun exposure. Just use insulating materials to separate it and try to prevent the outside temperature from affecting the internal equipment of the satellite. No matter whether it is high or low outside, just don't affect me inside.

However, the electronic system generates heat when working, which is very fatal. The satellite is like being placed in a thermos bottle. The heat cannot be dissipated and heat accumulates inside.

An even more terrible thing is that today's power devices often cannot avoid using things like electron tubes. The electron tube itself can withstand high temperatures, after all, it is just a big light bulb. The problem lies in this big light bulb. It is okay for it to generate heat itself, but if this heat cannot be dissipated, it will be fatal to other components in the system.

That's why Engineer Zhu was so anxious and so grateful to Gao Zhendong. He had never thought in this direction originally and had not considered many designs at all.

This means it is still in the early stages. The later this problem is discovered, the greater the loss may be.

Aerospace-grade electronic components can generally only withstand low temperatures of around -50 degrees Celsius, but can generally withstand high temperatures of at least 120 degrees Celsius. This is the biggest reason: it is actually very hot in the sky, and the cold is not that cold.

Seeing that he had understood, Gao Zhendong smiled and said, "Right, that's the problem. Simply considering heat preservation or heat dissipation is incomplete. We need to consider the heat dissipation of the electronic system and even the problem of heat balance. We may need to design a special system. Otherwise, even under direct sunlight, the spacecraft will be half cold and half hot. This is not just a question of whether the electronic system can work properly. If the structure is not well designed, the imbalance of thermal expansion and contraction can cause big problems."

"Yes, yes, yes, I'll think about it comprehensively when I get back. Fortunately, it's still in time, otherwise the loss would be huge." Engineer Zhu looked scared.

"As for the problem with the electronic system you mentioned, I can assure you that all the electronic components provided by the 120th Ministry of Machinery are selected based on their ability to work normally at degrees Celsius."

Gao Zhendong solved his initial problem directly, but now for Engineer Zhu, the biggest problem is obviously not this anymore.

He talked with Gao Zhendong for a while, then hurriedly left the Third Factory with his men. Today's trip was worth it.

(End of this chapter)