High-speed rail and cars can use electricity as power, so why can't airplanes? I'll understand after reading it

High-speed rail and cars can use electricity as power, so why can't airplanes? I'll understand after reading it

In ordinary daily travel, usually, if you want to travel long distances, the most suitable mode of transportation is the plane. Now with the introduction of some preferential policies, the price is also within a reasonable range, so the plane provides us with It is very convenient and has greatly improved our travel efficiency, so I would like to ask if you have a certain understanding of the pollution caused by the fuel used by the plane.

Especially when we are now advocating environmental protection, what are the advantages and disadvantages of the use of aviation fuel?

Nowadays, our usual means of transportation, such as ships and automobiles, have developed very advanced, and have gradually replaced fuel with electric energy. In this case, our new energy vehicles are more Advantages, its environmental pollution is extremely low, almost zero pollution can be achieved during operation, and no harmful gases will be emitted into the air.

At the same time, when using electricity, because the vibration is relatively low, the noise is relatively low during operation, which is very in line with the requirements of new energy development.

And with the changes in these data, our country's carbon dioxide emissions are also constantly decreasing, which has greatly improved our living environment.

However, you may think, if our means of transportation, such as cars, boats, etc., can use electric energy as power, then why have we not used electric energy as a power plane so far?

In fact, when you see that burning oil will produce a large amount of carbon dioxide, and these harmful gases will stay in our atmosphere for a long time, even more than half a century, everyone is very surprised. This is a very serious matter. Horrible thing, because many human vehicles are fueled by fuel, which will produce a lot of carbon dioxide.

And many traditional power plants still use coal to generate electricity, so new carbon dioxide is produced every day. These harmful gases are all produced by human beings, and they will stay in our air for a long time. No wonder we are now advocating low-carbon emission reduction!

In fact, scientists also understand that the most important thing for an aircraft carrier to achieve better energy conservation and emission reduction is to modify the kinetic energy of the aircraft carrier, so there are also corresponding electric-driven aircraft, but currently the aircraft that can be driven by electricity Airplanes are generally very small, and there are no large passenger aircraft.

Generally speaking, small electric aircraft can be divided into two types: all-electric and multi-electric, the latter of which is based on electric flight, but can also use other energy sources at the same time. In 1957, the world's first electric aircraft appeared Yes, named the Radio Queen, but it was also an aircraft powered by permanent magnet electric motors and silver-zinc batteries.

In the subsequent development process, Switzerland and the United States also have electric aircraft, but they are all small aircraft, and there is not a large passenger aircraft completely driven by electricity, which has not been researched yet.

Therefore, until now, no one has been able to develop a fully electric large aircraft, at least it is difficult for the current technology applications of various countries to reach this level.

Electric aircraft can be considered a success only if they have not only strong kinetic energy but also a strong passenger carrying capacity like a fuel airliner. It is still in the process of experimentation. Although it has achieved staged success, there is still a long way to go before it can achieve real success.

The most important thing is a breakthrough in battery technology. It must have enough energy to ensure the speed and power of the aircraft. With the current battery technology, if you want to power the Boeing airliner, it can only last for half an hour at most. time, but the volume of the battery occupies the entire cabin, that is to say, the aircraft can only carry a whole battery to fly around in the air, and there is no place to carry passengers. Therefore, the current battery technology is still far away. It is far from the standard to support the flight of the aircraft.

We must know that a fuel engine can fly thousands of kilometers with one refueling, and it is no problem to fly for a few hours. An international airline’s plane can fly thousands of kilometers at a time, and even a single flight can exceed a dozen Hours, this is a common thing. If an electric aircraft cannot do this, then it has no advantage, and it is not qualified to compete with other countries in the civil aviation market.

Next, what everyone has to do is to wait for a breakthrough in battery technology to make the battery lighter, and then we need to test the high-density storage capacity of solid-state batteries and whether they can meet the requirements of aviation batteries. Only by breaking through the bottleneck of batteries with more advanced technology can the goal of flying electric aircraft in the sky be realized.

Of course, in recent years, many companies, as well as some aerospace fans, have used some special technologies to create some aircraft that can use electricity as power. However, due to the short flight time, it landed on the ground in just a few minutes. This aircraft is obviously not good for commercial operation.

The flying distance of an electric aircraft cannot be too far, and one of the important reasons is that the capacity of the battery is too small. As I said earlier, the engine of an airliner can output 4,000 horsepower.

Such power consumption puts higher demands on the battery. Otherwise, with this little lithium battery, it is estimated that it will fall down before flying to the sky.

Today, the lithium-ion battery launched by Amprius in the United States is the battery with the highest capacity at present. It has an energy density of 450 W/kg, which is 76% higher than Tesla's. However, such batteries cannot yet be used on airplanes.

You know, the power of an airplane is more than 30 times that of a car. To maintain the flight of an airplane, it is not enough to exceed Tesla's 76% battery density, at least it must be higher than Tesla. 3000%.

Therefore, the two devices of the aircraft's battery and motor are the reasons why the aircraft cannot be electrified. If the performance of the battery and motor is better, it may be possible to allow an electric aircraft to fly into the sky.

This point is somewhat similar to the development of electric vehicles. At that time, the price of electric vehicles was not high, and a large part of the reason was the problem of batteries and engines. It’s okay if you can’t drive it, and the battery life is not long. Who would buy such a car?

So, in 2008, when Martin handed over Tesla to Marx, he withdrew from the company. It was Musk's re-development and integration of Tesla's batteries and motors, allowing them to achieve a double increase in power and mileage, which allowed Tesla to gain a firm foothold in the car field.

In a sense, if you want to make the aircraft fully electric, you must make breakthroughs in batteries and electric motors. Otherwise, it's all illusory.

However, it is not so difficult to turn these two technologies into reality, because both technologies have existed from the beginning. The only difference is that the aircraft has to solve more technical problems.

But in any case, as long as there are relevant entrepreneurs who continue to explore and enough technicians to research, one day, an all-electric aircraft will be developed and successfully fly into the sky!