The reserve of electrical energy is quite a troublesome thing, all kinds of chemical batteries have their own theoretical limits, and they can no longer be improved after reaching the upper limit.The upper limit of nuclear energy batteries is high, but it cannot be charged in turn and cannot be reused.

However, the issue of "power reserve" is very important for the safety of the spacecraft.In the vast universe of flight, all kinds of life-sustaining equipment must be turned on at all times, so the battery is the last backup safety measure, of course, the larger the better.

Until now, people are still struggling to study ultra-high-performance batteries... All kinds of chemical batteries aside, not to mention, the most outstanding at present, belong to a kind of "large superconducting flywheel battery."

This battery reserves not chemical energy, but mechanical energy!

On the surface, this flywheel battery is like a very huge, full-quality turntable of 100,000 tons!

It is located in the gravity-free zone of Noah.

When charging, the turntable will be rotated by force; when you want to discharge, use a high-speed rotating turntable to be discharged, and the magnetic sensor line can be discharged.

Don't look at this is just a turntable, but it contains the wisdom of technicians generation after generation, which uses a lot of superconducting magnetic levitation technology.If the rotation speed of the turntable is very large, because of the large-quality relationship, it will undoubtedly be able to reserve a large amount of momentum.Moreover, the efficiency of kinetic energy conversion to electrical energy is very high, reaching more than 90%.

Is there such a thing as a low-level civilization?The cost of a superconducting flywheel battery is not low."The peak was somewhat surprised.The report was written by an authoritative scientist, so he did not doubt whether there was an exaggerated component.

He couldn’t help but ask, “Did a low-level civilization also study good things?”“Is it a super flywheel battery?”

The female worker said with some amne: "Don't think too much, it's a very simple device: hydro storage."During the day, with the remaining solar power, they pump a lot of water resources upstream of the reservoir and convert it into gravitational potential energy.”

“At night, solar panels do not generate electricity, and the reservoir opens the floodgates to release water, and then uses the kinetic energy to generate electricity ... so that the problem of lack of electricity at night can be solved.”

"That's it," Yi Feng stayed, nodded, the reservoir storage method is actually quite good, but also people often use ...

It seems that there is nothing to learn from, and he is not discouraged, but continues to look down along the report.

This civilization uses solar energy on a large scale, and it is certainly not a natural preference for energy conservation and environmental protection.

It’s because they don’t have fossil fuels anymore!

2300 years ago, they used up almost all fossil fuels and uranium resources, and even the combustible ice that was easy to mine on the sea floor was almost used, and naturally there was a huge war.

Fortunately, the royal civilization survived the huge energy crisis, and after recovering from the war, the population has been reduced by more than half.It is difficult to survive the nuclear winter, and then slowly develop renewable resources, until the development of the present, the formation of a steady-state social pattern.

“The number of countries has also been reduced from a few hundred to fifty-three.There is local strife on the planet, but it is generally stable.”

“In the end, after the nuclear winter, the clean energy with solar energy as the core has replaced the original fossil energy a little bit... More than two thousand years have passed, and the whole planet has once again restored its attitude of green mountains and waters.”

"Using up fossil energy has become a good thing for the whole planet!"

“It’s funny.”Yu Yifeng smiled, which is very similar to people's previous speculation.

A low-level civilization, without a sufficiently reasonable system and ideology to complete the "uncontrollable nuclear fusion" with a huge economic scale, then ... the large-scale use of renewable energy will be the ultimate direction of light civilization.

Because... solar energy is almost endless.

The solar energy obtained by a planet, which is usually more than 10,000 times the consumption of low-level civilizations, can easily support the survival of these indigenous people, but it is a matter of convenience and inconvenience.

According to research during the Earth period, solar energy covers an area is too large, and the power generation is not stable enough, and the cost may be much higher than fossil energy.Because the energy consumption of solar panels is recycled, it takes 2-5 years, which is still a little too long.

I don't know how this civilization... how to solve it?

Yi Feng instantly thought of several possibilities, first, to reduce the quality of life, no way, energy is not enough, can only be reduced; second, reduce the population; third, vigorously study, improve the power generation efficiency of the electric board.

In short, the days can’t be as tipping as they used to be.

He casually asked, “So, their use of clean energy is very good?”

"Yes, so many years of research, even if it is a low-level civilization, has made great progress, and it can generally cover the energy consumption of the entire production and use cycle in 20 months."Because of the energy transition, they have not enough power to challenge nuclear fusion, but they are moving further and further away in the use of solar energy.

“It should be... better than us!”

The young girl quietly spat out her tongue, and seemed a little ashamed.

As a new human being interstellar civilization, it is not as bad as a low-level civilization in terms of solar energy utilization, which makes her a little embarrassed: "The photoelectric conversion efficiency of solar panels is much higher than ours ... and the conversion of various electric energy is also at a deeper level, and there is a place worth learning."

Yu Yifeng smiled again and said, "This is normal, more than two thousand years, the non-stop development of renewable energy, must be more powerful than us ... any civilization, there is a place to learn."

"When we carry out the scientific expedition, we can also get a few solar panels to study..."

Of course, the main task of this scientific expedition is not to steal things, but to understand the culture of this indigenous civilization and collect more information.By the way, a small deep-sea scientific research base will be established to solve the problems related to microorganisms, so that people will not be easily sick.

The location of the scientific research base is located near the south pole of the "Yuanfu 2", which is rarely visited and is the best place to sneak in landing.

The mission was carried out by two hundred carefully selected researchers, men and women, including various biologists, informants, linguists, and so on, plus twenty soldiers.

These two hundred and more people are superhuman!

The superhuman immune system and survivability are much stronger than the average person, which can adapt to local microbes faster and make it easier to make immune vaccines.

After the birth of the perfect immunization vaccine, even ordinary people can travel to this planet.

Seeing that all the preparations were ready, Yi Feng went to the soldiers and shouted: "This hundred biologists are our treasure, conquered the ecological circle of several planets."There are other experts, but also the authority of all aspects, I do not say much, be sure to cooperate with their instructions!Do you understand?”

“Understood!”

“Go away!”

...

A week later, a small country of Auri 2 reported an inconspicuous news: Satellites in the sky observed that several meteorites that had never been found before had fallen into the Antarctic.After these meteorites sprinkled with huge blooms, they sank into the local ocean.

For this news, in addition to some astronomy enthusiasts pay attention to a few eyes, the whole event did not make much waves.

The universe is so big, so many meteors, almost tens of thousands of tons fall on the planet every day.A few large meteorites near the Antarctic do not seem to be a big deal.

And places like Antarctica, there are seas everywhere, and they have no economic value.Because of the heavy use of fossil fuels, more than two thousand years ago, it caused a huge greenhouse effect, so that all glaciers melted and the ecosystem was devastated.

It was not until the nuclear winter behind it that the thick ice condensed back again.

But after such repeated iterations, Antarctica has not had much scientific value.

Moreover, the light intensity here is very weak, there is no power generation value, combustible ice has been dug up, except for a few glaciers, plus the vast seawater, there is nothing.

So there is no one who really wants to run into the ocean and spend a lot of effort to catch meteorites...

A few days later, however, a secluded, dark blue submarine floated out of the sea so quietly... Its color was almost the same as the sea, sailing at sixty kilometers per hour.

From the submarine to find a few people's shadow, the head of the one, is the soldier captain Zhao Yao!