Open an aircraft carrier to fight against Japan

Everyone was taken aback, Qiu Xian's eyes lit up, and he asked: "Are you talking about lossless pipeline transmission technology? This technology installs a device at the power generation end—an electron accelerator, which can convert current into electrons. Accelerate the transmission to the power consumption end, and then install an electronic reducer at the power consumption end, and then convert the electron flow into current. In our era, one-fifth of the world's electric energy was consumed during transportation. This power transmission Technology can minimize losses."

Lin Yuan asked, "Has this technology already appeared?"

Qiu Xian said: "Our country is developing it, but it is in a top-secret state. Now that we have reached this era, there is nothing to hide. Although this technology saves power, it is extremely technically difficult, especially the accelerator and reducer. Technology requires high-precision control technology, and with the technological level of the era we live in, we dare not dream of it."

Lin Yuan said: "Actually, we don't need such cutting-edge technology. There is a gas called sulfur hexafluoride. Have you heard of it?"

Liu Jinqiu said: "I've heard of this gas. This gas is very interesting. It has no poisonous effect on the human body, so people can inhale some. After inhaling, the voice of speaking will become extremely low, as if it has changed. Just like a person."

Lin Yuan said: "This is indeed a property of this gas, and this gas has another more important property, which is insulation."

Lin Yuan went on to say: "There are a lot of electrical equipment on the Beijing ship that operate under high voltage conditions. These devices use a gas-insulated protective switch, and the gas inside is this sulfur hexafluoride. I know that the Beijing ship There's a lot of this spare gas, so we can use it to make cables."

Qiu Xian said: "After being reminded by you, I also remembered that there is indeed such a gas-insulated cable. This kind of cable has excellent insulation performance, and its structure is simpler than conventional cables. It does not need an automatic oil-filled structure. The structure is like this, there is a wire in the middle, an insulating support is installed outside the wire, and a layer of metal thin-walled tube is installed outside the support. The gas is inside this layer of tubes, and the outermost layer is a steel tube to improve strength. Protect internal structures."

Lin Yuan said: "That's right, that's it. We have all kinds of materials needed for this kind of cable. Needless to say, the wires, the insulating support can be made of ceramics, and we can also make the outer metal tubes. We can also weld them. Not a problem."

Qiu Xian said: "Okay, we will then calculate the relevant parameters and manufacture this cable as soon as possible."

Lin Yuan said: "We can use the backup on the Beijing ship for the transformer, let's discuss the generator now." Qiu Xian said: "From the perspective of energy, the sources of electric energy can be mainly divided into the following two types: one It is the potential energy of water, which makes water flow down from a high place, drives the water turbine to rotate, and generates electricity. This kind of energy is used by hydropower stations; the other is chemical energy, which is chemical fuel. The equipment that realizes the conversion is thermal power generators. Combustion produces high-temperature steam, which turns a steam turbine to generate electricity."

"There are also some new concepts of power generation, such as nuclear power generation, tidal power generation, wind power generation, solar power generation, etc., because they are not applicable to us now, so I will not introduce them in detail."

Lin Yuan said: "I don't think hydropower is suitable for us. If we want to build a hydropower station, we must first have suitable rivers. There are indeed many rivers nearby, and many of them have the potential to build power stations. However, to build a hydropower station, we must build large rivers. The dam, using the dam to block the water, raises the upstream water level, so that the potential energy of the water flow will increase, but now we do not have such a large engineering construction capacity, so it is difficult to build the dam successfully."

Qiu Xian said: "Then we will use chemical energy to generate electricity. As for chemical fuels, our coal mines are already being mined now, so there are plenty of fuels, but..."

Lin Yuan asked: "What difficulties are there?"

Qiu Xian said: "The principle of the generator is Faraday's law of electromagnetic induction. Let the conductor cut the magnetic induction line to generate an induced current on the conductor, which puts forward higher requirements on the electromagnetic performance of the conductor. In our era, The rotor of power generation equipment uses silicon steel with good electromagnetic properties. When we design the generator, the grade and performance of the silicon steel are listed in the design manual. We will not consider how the silicon steel is smelted, so We wondered, do we have silicon steel like this?"

Liu Jinqiu said: "We still can't manufacture silicon steel with excellent electromagnetic properties. You can temporarily use low-carbon steel instead."

Qiu Xian said: "In this case, the efficiency of power generation may be very low."

Lin Yuan said: "It doesn't matter if the efficiency is low. The most important thing for us is to generate electricity first. After that, the electric arc furnace can smelt high-performance materials. At that time, we will gradually improve the equipment and increase efficiency."

Qiu Xian said: "The rotor of the generator needs equipment to drive it. In our era, there are two types of equipment, one is the steam turbine, which uses high-pressure water vapor to drive the impeller to rotate, but the thermal efficiency of the steam turbine is relatively low, so it has The trend of being replaced by another type of equipment is the gas turbine, which is directly driven by high-temperature air, eliminating the process of heating water, so the thermal efficiency is higher, I think it is better for us to build gas turbines.”

Lin Yuan said: "The construction of a gas turbine is very difficult. First of all, the shape of the blade is not easy to process, and the material of the blade is very high. The speed of the gas turbine may reach tens of thousands of revolutions per minute, which will generate huge centrifugal force. If If the tensile strength of the material is not high, in layman's terms: it will be broken directly! Therefore, it is more appropriate for us to choose a steam turbine."

Liu Jinqiu said: "Although the construction of gas turbines is difficult, the construction of steam turbines is not low. The first is the quantity and pressure of water vapor produced by the boiler. The boilers we build now are limited by the performance of steel, and the pressure of steam should not be too high. High, otherwise the internal pipes may be damaged, and the pressure of the steam will be reduced, and the steam turbine will not be able to effectively generate electricity."

"There is also the problem of the steam turbine itself. Although the rotation speed of the steam turbine is slower than that of the gas turbine, the water vapor has a great impact on it, which puts high demands on the strength of the steam turbine blades. In our era, steam turbines usually No margin precision casting is adopted, and we do not have the related equipment; there is also the problem of bearings, the volume and weight of steam turbines are generally far more than gas turbines, such a large weight, and fast rotation, must have advanced bearings, but we are now Not even bearing alloys."

Qiu Xian also said: "Yes, the electromagnetic properties of our low-carbon steel are not good. If the performance of the steam turbine cannot keep up, it will not be able to generate electricity at all."

It seemed that it was another technical difficulty, everyone was silent again, Lin Yuan said suddenly: "I have figured out a way, we can use airplanes to generate electricity!"

Everyone was taken aback when they heard this, Qiu Xian asked: "What did you say? What is using an airplane to generate electricity?" Before Lin Yuan could answer, Qiu Xian nodded and said, "I want to understand."