Homo sapiens.

And the Dandelion project derivatives are not just that.

As the general manager of this project, Su Changli, who is also the chief engineer, is responsible for the guide rail and electromagnetic acceleration system.

This system is not simple.

Otherwise, the Ford of the US military would not have been in service, because their electromagnetic ejection technology was not up to standard.

Su Changli has no obsession with moral cleanliness. He directly "borrowed" the mature technology from a certain big country.

However, he did not follow the script, because the ejection quality of the two sides is different. The ejection quality of the Dandelion project starts at least 500 tons, and the speed must reach 7.8 kilometers per second. There is definitely no way to copy it directly.

His design plan is adjusted to nuclear fusion furnace + resonance power generation + thermoelectric power generation as the power supply system.

Resonance power generation has a characteristic, that is, the instantaneous power generation can skyrocket through nuclear explosion, which reduces the pressure on the supercapacitor.

But in the process, Su Changli discovered a problem that had been overlooked before, that is, the instantaneous high voltage and high current could easily cause the transmission system to be overloaded and even easily paralyzed.

This problem is very serious. If the spacecraft is accelerating and suddenly one of the power supply links fails, the speed of the spacecraft may not be increased, and then it will not be able to fly out of the atmosphere.

To this end, he contacted major electric power companies and electric power research institutes.

Finally, after several months of hard work, they worked together to create a superconductor material, an alloy material using a combination of copper, barium, lanthanum, and silver, which can maintain superconducting properties at temperatures below minus 24 degrees Celsius.

Although it has not reached the level of a room temperature superconductor, minus 24 degrees Celsius is not unusable.

The liquid nitrogen circulating cooling system can maintain the temperature of the transmission line at minus 30 degrees Celsius, and the core of the liquid nitrogen circulating cooling system is equipped with an inverse temperature difference system to efficiently remove the heat of liquid nitrogen to achieve low cost and high efficiency. of refrigeration.

The properties of superconductors need no explanation.

There is almost no loss of current in a superconductor.

It should be known that in conventional wires or plateau cables, the current has 10-20% ineffective loss, and this part of energy is wasted in vain.

Although Homo sapiens has been promoting the power supply balance strategy, it strives to supply the power of various cities and bases nearby, rather than engaging in long-distance power transmission across regions.

But even so, the loss of current during transmission is still not small.

Therefore, this alloy material has great potential.

It's just that the cost of this material is relatively high, which makes all the power companies feel a little bit pained.

Copper and barium are fine. Homo sapiens have discovered several super-large deep copper deposits in the Luzon Islands and Sumatra, and the total copper reserves have increased to 12.8 billion tons. Barium can be extracted through seawater, which is also not a problem.

But lanthanum and silver are different.

Lanthanum is a rare metal and silver is a precious metal.

According to the optimal ratio, copper is 41.3%, silver is 31.2%, barium is 15.8%, and lanthanum is 11.7%.

The use of silver and lanthanum is too large. Even if the underground veins discovered by Homo sapiens are counted, the silver reserves are only 837 million tons, and the lanthanum is only about 7.2 tons.

Among them, lanthanum has other uses, and the current annual output is only 600-700 tons, which determines that it is difficult to apply this type of superconductor cable on a large scale.

However, some scientific research laboratories, such as the stellarator laboratory and the tokamak laboratory under nuclear fusion research, need this kind of superconductor.

This material can also be used for the transmission main lines of some other cities.

After all, the monetary attribute of silver is not high, and expanding its industrial attribute is the kingly way.

Anyway, the silver and lanthanum used to make superconductor cables do not disappear after use. At worst, the silver and lanthanum can be recycled and reused after technological innovation.

Through the research and development of lead-tungsten-gold thermoelectric materials and copper-barium-lanthanum-silver superconducting materials, Homo sapiens have also discovered various rare and precious metals, and their importance in industry is increasing day by day.

The purchase of precious metals and rare metals that has been promoted before, and the regulations on binding gold dollars have effectively improved the resource reserves of Homo sapiens.

But this is far from enough.

Now, in addition to continuing to dig deep into the local resource potential, Homo sapiens is also looking at the vast Pacific Ocean, Ceylon Ocean and Southern Ocean, as well as South America, Africa, and Antarctica.

The development of resources in these areas is not high, and some are even inaccessible. The resources contained in them tempt Homo sapiens to speed up their pace.

The endowment of natural resources plays a very critical role in the development of a power.

For example, America, relying on the vast Great Plains of North America, has a very strong potential for agricultural production. Even if it is forced by Homo sapiens to continuously shrink its sphere of influence, it can still maintain its interior.

If it is replaced by the European Union, if they are fully besieged by Homo sapiens, they will definitely not be able to last for a few years.

The EU's agricultural, energy, and mineral endowments are average. If the resource supply of those economic colonies and Lucia is lost, it will be difficult to stabilize internally.

Even if the European Union is not the number one opponent of Homo sapiens in the past few years, it is only affected by the confrontation between Homo sapiens and America, and various problems have arisen.

Homo sapiens crazily grabs territory and population in order to weaken the resource potential of the opponent and compress the living space of the opponent.

To step into the starry sky in the future, the resources needed must be enormous.

Without enough resources, it is impossible to develop the universe.

……

The cooperation between Su Changli and the power company has brought about the application of low-temperature superconductors.

In addition, the subway group also approached Su Changli, wanting to introduce electromagnetic acceleration technology, combined with sub-vacuum pipelines, to greatly increase the speed of freight trains in the subway.

According to calculations, if the new electromagnetic acceleration technology is used, coupled with sub-vacuum pipelines, the maximum speed of freight trains can be increased to 720 kilometers per hour.

This not only improves transportation efficiency, but also further expands the radiation range of the metropolitan area.

However, the ultra-high-speed subway still has some problems to be solved, such as the problem of stopping at the station, the problem of deceleration, and the problem of coordination.

Electromagnetic acceleration combined with sub-vacuum can indeed run fast, but deceleration is a problem.

If the reverse thrust brake is used, the energy consumption of the brake is not small; while the friction mechanical brake is used, there is certain damage to the track and the wheel;

In addition, there is a circular track air pressure braking method, which is to build a special circular track as a parking station. When the high-speed train enters the circular track, the train stops accelerating, and then gradually injects air into the track to use air resistance to slow down the train.

This solution does not consume much energy, but it will increase the amount of work, and the braking time will take more than ten minutes.

In addition, there is a reverse electromagnetic acceleration scheme, that is, when the train needs to decelerate, the acceleration direction of a part of the electromagnetic track is reversed to achieve the effect of deceleration.

It is precisely because of these troubles that the current Homo sapiens subway has not further increased the speed of the train.

After all, the consumption caused by these transformations will reduce the cost performance of ultra-high-speed trains.

Unless it is a train with a voyage of more than a thousand kilometers, with almost no stops in the middle, super high-speed trains will be useful.

Otherwise, in the case of a station of more than ten kilometers in Southeast Asia, the super high-speed train will slow down before it reaches the limit, and there is no need to use super high-speed trains.

This is also the reason why the current speed of Homo sapiens passenger trains is only 150-250 kilometers. It is not that the speed cannot be increased, but that there is no distance to increase the speed.

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