For human beings, although the environment of tens of degrees below zero is indeed a forbidden zone for life, which is not suitable for human survival at all, even in the worst polar environment, human beings have also built permanent polar scientific research stations, and the scientific research stations are not buried deep underground, but directly placed on the surface.

The low temperature of dozens of degrees below zero is indeed a desperate death, but with the current human science and technology, there is no problem to build a warm and comfortable scientific research station in this environment.

Taking Yanguo's scientific research station in the polar region as an example, the container room is sprayed with 120mm thick polyurethane insulation layer, and then decorated with outfitting board. It is both warm and beautiful, and can completely resist the freezing temperature of dozens of degrees below zero in the polar environment.

Of course, the scientific research station itself does not produce temperature, even if the insulation is good, heat exchange is still happening, so the scientific research station itself still has heating equipment.

But this is enough to prove that the existing human technology in the face of cold and low temperature really does not need to dig thousands of meters underground.

With the existing scientific and technological strength of mankind, as long as the shelter is well insulated and protected, and equipped with reliable heating equipment, it is enough to ensure that a shelter can be warm and comfortable in the environment of minus tens of degrees.

But reliable heating is not so easy to guarantee in this era of doomsday.

Taking polar scientific research station as an example, there are generally two heating methods, electric heating and fuel heating.

Because scientific research stations usually generate electricity 24 hours a day, larger scientific research stations usually use indoor electric heating for heating. This way of installation and maintenance is simple and easy, and can control the temperature at will, clean and clean. Sometimes, most of the power of scientific research stations is used for heating. When the temperature of the external environment is low, it is easy to cause overload of the generator, and improper use is also easy to cause electrical fire .

Some scientific research stations use oil fired boiler as the main heating equipment, similar to the ordinary heating in northern China, which requires additional installation and maintenance of heating equipment, but it is not prone to electrical fire and other accidents, which can effectively reduce the generator load.

In addition, some small scientific research stations in summer only have simple gas heating equipment. They use special gas heating to burn liquefied gas or natural gas in tanks indoors, but they need to pay attention to ventilation and pay attention to the concentration of carbon monoxide in the air at any time to avoid carbon monoxide poisoning.

These three heating methods are mature and reliable. Although they have their own advantages and disadvantages, they can meet the needs of shelter heating.

According to Chen Xin's understanding, the three large shelters in the city are all built with additional boilers for heating, but they are not burning oil, but coal.

Yanguo's oil reserves are not particularly abundant, but its coal reserves are relatively abundant. After all, Yanguo's oil reserves are the ninth in the world, but its coal reserves are the third in the world.

What's more, oil is produced from crude oil, which can't be burned directly. It needs to be processed into gasoline, diesel and kerosene before it can be burned.

But coal can be burned directly when it is dug out, so under the condition of ensuring railway transportation, coal burning is undoubtedly more cost-effective than oil burning, and it is stable and reliable.

Therefore, it's a very good choice for large-scale shelters to use boilers for heating. As for the extra maintenance work, the least valuable thing in the end is manpower. Tens of thousands of people live in a large-scale shelter, and they don't worry about finding people to work.

For the shelters which are not so large in scale, there is no need to adopt such a way. Under the condition that the power supply can be guaranteed, they can use electric heating for heating. There is no need to install heating boilers.

Private shelters like Chen Xin's and Mo Qingyan's can basically meet their heating needs by installing a heating air conditioner or two electric heaters. It's not practical to install boilers because they have money to burn and they have brains to smoke.

However, this is a wake-up call for Chen Xin. In the shelter upgrade plan, the heating system should be put on the agenda.

Although I have prepared an electric heater and blanket for myself, isn't it good to upgrade to make my life more comfortable? Why do you have to wear cold proof clothes indoors and sleep with three quilts?

Chen Xin thought so, and habitually took out his notebook, wrote and drew on the paper, considering the next upgrade plan of the refuge.

The notebook is now written with four items, power supply, lighting, food and medical treatment, in the order recorded by Chen Xin. After thinking about it, Chen Yu added heating before lighting.

The power supply system must be the top priority option for upgrading, because in the other four projects on the notebook, except for the medical treatment which is not a priority, the other three projects will increase the power consumption of the refuge, so upgrading the power supply system and increasing the power generation of the refuge is a must.

Moreover, Chen Xin must also consider the fuel consumption caused by power generation. According to his current electricity consumption, the average daily gasoline used for power generation needs ten liters. With the increase of electricity consumption, the fuel consumption is bound to increase. Chen Xin must consider the supplement of gasoline and obtain a more durable and efficient power generation method.

If it's normal, the only long-term self-sustaining and efficient power generation method Chen Xinneng considers is nuclear power, which he can hardly touch. However, for Chen Xin, who has a system, geothermal power generation and geomagnetic power generation, which are still in the stage of science fiction and laboratory research for human beings, are all in his future upgrading plan.Therefore, Chen Xin is not worried about how to obtain an efficient and sustainable power generation method. He has been upgrading the refuge, that is, as long as there is enough survival for continuous upgrading, Chen Xin believes that even black technology power generation methods such as antimatter reactor or artificial sun can be upgraded.

Although these sci-fi technologies are too far away for Chen xinlai, and the survival needed is astronomical, under the powerful power of the system, these are indeed things that can be expected.

Although the future is promising, it's still too early to think about these things. The most important thing now is to re cultivate and plant new vegetables on the land vacated from the previous harvest of vegetables in the greenhouse, so as to find Mo Qingyan to exchange the materials needed for upgrading next month.

However, thinking of exchanging materials, Chen Xin thinks that he should make a list first to see what materials he needs now. In this way, he can find Mo Qingyan to exchange materials with a definite aim, and let her prepare in advance, so as to save time.

You know, even if Mo Qingyan has a relationship with Uncle Ding, it takes time to get supplies.

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