Courtyard light

Chapter 692 New energy? (First update)
The reason why Liu Hai said that the rocket motor itself is no problem is because there are many missiles on the aircraft carrier. Some of these missiles use solid rocket motors and some use liquid rocket motors.

In fact, many people have a misunderstanding that liquid rocket motors are not as good as solid rocket motors.

But precisely in aerospace, liquid rockets have great advantages. The first is that liquid rockets can ignite twice.

If you want to land on the moon or Mars, you must use a liquid rocket engine.

That is to say, the moon landing rocket needs to turn on the rocket engine when it lands on the moon and returns. It is obviously impossible for a solid rocket motor.

Therefore, the only option is to use a liquid rocket engine. In addition, the thrust of the liquid rocket engine can be adjusted, which is the delivery speed of its fuel pump.

And the world record for the largest rocket in the world in 2020 also uses a liquid rocket engine.

Of course, solid rockets also have their own advantages, that is, fast response speed, so many subsequent anti-aircraft missiles and other missiles use solid rocket motors.

Because liquid rocket engines are not refueled until they are in use, their response time is relatively slow.

"You can arrange it yourself. You have too many things on your hands now, and although there is a gap between us in this aspect, it is not very big." When Sun Aiguo heard what Liu Hai said, he wanted Liu Hai to participate in the research, but he also thought of Liu Hai's hand. So many things in it.

"Actually, the investment in research in various aspects has been huge. To be honest, our country has been able to develop to this day and have such good results in industry. A large part of it is because the technologies you have developed have broken through the Western blockade, and even More advanced than the West," Sun Aiguo said again.

"Our country's automobile industry, yacht industry, motorcycle industry, toy industry, even in the cultural field, and even the military industry can emerge in the world and even occupy most of the market, basically because of the technology you developed."

"Don't worry too much. There are always things you can't finish and things you don't like." Sun Aiguo was afraid that Liu Hai would think too much and be too busy.

"Thank you, director, for your concern!" Liu Hai naturally understood the meaning of Sun Aiguo's words.

"When you mentioned lithium batteries for submarines, didn't you mean that lithium batteries are not very safe?" Sun Aiguo asked again.

"Lithium batteries are not safe, but they are very effective. This underwater sightseeing boat is going to use two types of batteries, one using lithium batteries and the other using lead-acid batteries."

"The performance of lithium batteries is better and the voyage time is longer." Liu Hai is of course preparing for those customers in South America.

Using lithium batteries for submarines is actually a relatively risky move. In the traditional sense, all submarines use lead-acid batteries. However, lead-acid batteries have one of the biggest shortcomings, which is low energy density. Heavy weight.

Lithium batteries have high energy density, but they generate heat during charging and are inherently dangerous.

Of course, it doesn't matter if you are shipping flour as a customer in South America. It is a risky thing in the first place.

However, when Liu Hai traveled through time, the notebook used lithium batteries, and it was said that all submarines were going to be replaced with lithium batteries.

Xiao Benzi had no choice but to do this, mainly because his AIP system was not good enough.

Speaking of which, Xiaobenzi is also duplicitous. On the one hand, he said that he is not optimistic about lithium battery new energy, and on the other hand, he uses this lithium battery on submarines.

Using lithium batteries for small books is a helpless choice, because if you want the submarine to have higher performance, without a breakthrough in the AIP system, you can only use a smaller lithium battery pack with higher energy density as the power reserve.

Because according to calculations, the performance of lithium batteries for the same submarine is much higher than that of lead-acid batteries. Lithium batteries can allow the submarine to stay underwater longer and perform more tasks.

If Xiaobook's AIP system can meet the usage requirements, they will probably not use lithium batteries.

AIP refers to the fuel cell power system, that is, hydrogen fuel and oxide are placed in a special combustion chamber for electrochemical reaction, which is directly converted into electrical energy. The output DC power directly drives the motor, and the motor drives the propeller shaft.

The little book also claims that this submarine using lithium batteries is a sub-nuclear submarine.

In fact, this is just bragging, because the underwater speed of the small Whale-class motor is only 4 to 5 knots, and the most important thing is that the nuclear power can start the cycle and provide sufficient oxygen underwater.

Other conventional submarines only use compressed oxygen.

A nuclear submarine can reach a maximum speed of 30 knots without considering noise.

Moreover, lithium batteries still have a shortcoming, that is, the cost is too high. The cost of the small Whale class reached 4.5 million US dollars.

Of course, Xiaobao always falsifies data, so there is nothing wrong with bragging.

Of course, this has a lot to do with Xiao Benzi's own lack of resources. Everything he has has to be imported.

In my last life, Liu Hai always heard people say that our country is lacking in resources. In fact, our country's natural resources are not much less than other people's. Take iron ore as an example, our country still ranks fourth in the world, although the grade is slightly lower.

However, many iron ores in our country are not just iron ores but contain other rare metals.

In terms of rare minerals, our country has always been among the best. During World War II, why did Santoku give us so many weapons? They wanted our tungsten ore, tung oil and pig bristles.

Why the bald eagle also gives us weapons later is also because it needs these things.

Lead and zinc rank second in the world, and copper ranks sixth in the world.

Natural gas seems to be ranked seventh or eighth.

In the semiconductor era, my country's heavy rare earths account for more than 90% of the world's heavy rare earths.

As for why we feel that we are lacking resources, the main reason is that we import too much.

Why do we import so much? It’s because we used a lot as the world’s factory in our previous life.

And if you don’t use the foreign exchange in your hands to buy these resources, what can you buy?

Some people think that our high-priced iron ore imports are a loss-making business.

But the account cannot be calculated like this. First, how much industrial scale will iron ore smelting drive?

Why are the origins of many iron ores not used for smelting and then we directly import crude steel?

That's because no one does it, and the imported ores contain rare elements.

In the smelting process of many rare metals, we have reached the world's leading level precisely because of our scale.

Just like the slag stored in Panzhihua in the past, when Liu Hai traveled through it, all of it had been smelted and the rare metals in it had been extracted.

Many people don’t understand why our country exports so much crude steel. This slag is also a treasure. Maybe the rare metals gold, silver, copper, aluminum or other lead and zinc contained in one ton or two tons of slag have little value, but hundreds of thousands of tons and thousands of How about tens of thousands of tons or hundreds of millions of tons?

Even the remaining slag can be used as cement and other building materials, so nothing is wasted.

"So can this kind of lithium battery be used in conventional submarines?" Sun Aiguo asked after hearing what Liu Hai said.

"It's a bit dangerous. The diving toy like mine is small in scale and contains not many lithium batteries. If a submarine of several thousand tons uses this kind of lithium battery, the risk will be too high. First of all, with the increase in battery packs, it will take longer to charge. Heat generation and other problems will increase. "The other thing is the cost. If lithium batteries are used, the cost may be doubled!" Of course Liu Hai disagrees with using lithium batteries for submarines.

"My main customer is actually South America. I used to sell them small airplanes, but now I sell them underwater sightseeing boats."

"For profiteering and dangerous industries like theirs, although the cost of lithium batteries is high, their performance is good, so it doesn't matter."

"There is also a lead-acid battery, which is mainly used for real underwater sightseeing." Liu Hai smiled when he said this.

"Our small aircraft industry is indeed a bit weak right now. Mainly customers in South America can already produce some parts themselves. What they mainly import are engines and instruments. They can actually make other wooden parts themselves!"

"The main reason is that the wood there is very cheap, and the people there can actually hand-make various wooden accessories for small aircraft."

"Some even use a few steel pipes to weld a simple shelf to reduce its own weight and increase the amount of goods it can carry!" Sun Aiguo shook his head.

The technical threshold for fixed-wing small aircraft is not very high. Except for the core engine, everything else can be made by hand.

Liu Hai nodded, this is understandable, after all, separately imported engines are more concealed.

"Can the export price of parts and components be increased?" Liu Hai said after hearing this.

"Prices have increased, but domestic jobs have been reduced a lot. In the past, many factories that produced aircraft wood parts faced the risk of reduced orders. Fortunately, our demand for wood is now very high."

"The wooden frame packaging used for these products exported every year is an astronomical number."

"Now the price of timber imports is getting cheaper and cheaper, mainly because the timber from Southeast Asia has impacted the international market. The countries there have just been established, and there are not many ways to make money!"

"Coupled with the rubber industry that dealers are vigorously promoting, the original trees are cut down and all are used to plant rubber."

"But this is good, because it makes the export price of Xiaobenzi's wood much lower."

You probably know what Sun Aiguo is talking about. We did not exploit our country’s virgin forests more than 10 years ago.

The main reason is that imported ones are too cheap, much cheaper than cutting down forests yourself.

Mainly dealers form a complete supply cycle system. While we export industrial products, we import various raw materials.

And many countries in the world only sell resources in exchange for industrial products.

"Dealers now have almost a monopoly on timber sales around the world. Just because of the wave of low-priced timber sales in Southeast Asia, many timber companies went bankrupt, and then dealers bought back these timber companies." Sun Aiguo took a sip of water. said.

Of course Liu Hai knows that by doing this, dealers have the right to speak about wood.

"But we are not afraid. If their price is too high, we will cut our own."

"Our neighbors to the north also have a lot of wood. Last year they wanted to export wood to us, but we didn't want it!"

Liu Hai knows that although we have a bad relationship with our neighbors to the north, we still have business contacts, but it's just on a small scale.

"How are you doing with the Internet? Do you want me to talk to people from the railway department and find out what they think?" Sun Aiguo asked again.

"There's no rush for now. I've asked someone to make a plan. Once it's completed, I'll report it to the higher authorities first." Liu Hai nodded.

"Next year, our area will have a subway connection. The subway line directly from the city center to the airport will be fully connected next year. After that, there will be several subway stations near our factory."

"I really didn't expect it. It will be much more convenient for us to enter the city in the future!" Sun Aiguo said another thing.

"Huh? So fast?" Liu Hai knew that the airport he was talking about was Capital International Airport. In fact, this airport was just northeast of the motorcycle factory.

The motorcycle factory extends over a large area from Dongzhimen to the airport.

Most of the employees inside the motorcycle factory don't know how big the factory is because there are many places that are off limits.

The factory has its own traffic police and its own traffic light system.

The number of vehicles that can enter and exit each factory area is different.

Of course, the factory also has its own aircraft for passenger transport, cargo transport, airports and terminals.

"Sorry, there are already several subway lines. Our plan here is relatively late."

"The next step is for higher authorities to vigorously develop public transportation, mainly because there are too many cars on the road now, including bicycles, motorcycles, and all kinds of cars."

"Fortunately, you suggested making the road wider when building it, but according to the current development, in a few years, the city will probably be even more congested."

"So the next step is to encourage public transportation and prepare to open special bus routes."

"It doesn't mean that buying things like cars is strictly prohibited. Anyway, if you drive yourself, you will miss work, so naturally you won't be able to drive."

"Then the next step is to strictly control the commuting time. For those who arrive late for commuting and leave early, they must be included in more assessments, benefits, and promotions, so that they will naturally take public transportation!"

"In addition, starting from this year, all new buildings must have a certain amount of underground parking spaces. You had the foresight to build several museums and huge parking lots in the city."

"If you open these parking lots now, you can collect a lot of money every year."

"The next step is to increase parking fees and further reduce the number of private cars in Kyoto."

"Let's see if we can slowly ease the traffic!"

Liu Hai finally understood why he did not want to buy a car in Kyoto in his previous life. On the one hand, there were objective reasons, and on the other hand, it also had the role of policy guidance.

"Should we take out the lithium-ion battery electric vehicles?" Liu Hai was a little hesitant, mainly because it would be more dangerous for electric two-wheelers to use lithium batteries.

In addition, the current power supply is very tight, mainly due to the rapid expansion of domestic industry, and many rural areas often experience power outages.

"However, we can make some suggestions on the highway to reserve some places for charging later!" But Liu Hai thought of another point.

"But now that we are relatively strong in engine technology, there is no need to open another track?"

"But it's a good thing to keep these places. In the future, new energy vehicles will be combined with corporate vehicles, which can reduce our dependence on fossil fuels!"

"Should we build a natural gas-specific engine? Our country's natural gas reserves are not small. The key is that it is cheap!" Liu Hai thought a lot.

(End of this chapter)