Low steam utilization. This is an extremely significant issue.

The steam engine was invented hundreds of years ago. This problem has also been studied by scientists for hundreds of years, and it has been continuously improved to continuously improve the utilization rate of steam.

This is a big problem. It's not just about saving raw materials. The main problem with the low steam utilization rate is that the power is significantly weaker. If the problem of power cannot be solved, the steam engine will never be promoted. Because it will be a chicken rib......

Fang Hanxian raised his hand a little embarrassed: "Master Li, can I ask questions?" ”

Li Zhen pinned the pen to his ear and said with a smile: "Han Xian, if you have a problem, just say it." Don't be restrained, everyone is crossing the river by feeling the stones, no one is high or low, just call my name. ”

As soon as he had the opportunity, Li Zhen would encourage Fang Hanxian, who had a very low self-esteem. Let him be cheerful. He understands that Fang Hanxian has suffered more grievances than himself in the past ten years, and the inferiority complex in his heart is deep in his bones. Scientists can't be inferior, knowledge is obviously armed to the teeth.

Fang Hanxian laughed, stood up and said, "I'm ...... now There is no clear concept to understand the problem and phenomenon of 'conversion of steam energy into power'. Can Master Li make a rough idea first, so that we can intuitively see that steam is actually the embodiment of power? Maybe you can intuitively see that steam has power, and the three of us can also help you, and think of some questions. ”

Li Zhen nodded and said, "Grace." ”

"Master Li here."

"Bring a basin of water and a small plank."

"Yes, Master Li."

"Han Xian."

"Yes."

"You bring an alcohol lamp, and then a hose and a test tube."

"Yes."

“……”

Liu Jinghong asked: "What are you doing with these things?" ”

"Maybe you just see a teapot boiling water, and you don't have a very intuitive impression of steam power. It's a new concept after all. I'm going to do a little experiment to show you how much power it looks like. ”

"How?"

"You'll find out later."

Moments later, the two of them took their things and ran back to the lab. When the two of them were holding things, they attracted the attention of other students. Everyone knows that Li Zhen led the team to study the steam engine project again, and if there was progress in the heart, they all ran over to see the excitement.

The two of them entered the house, and the other classmates also came, surrounding the auditorium.

"I heard that it was researched?"

"So fast? What a joke. ”

"It's only been a few days, and you see, the sketch on the table hasn't been finished yet."

"So what is this for?"

"I heard that it is to let everyone see the principle and concept of the steam engine."

"What are you doing with a basin of water? What is the concept of this? ”

“……”

But I saw that Li Zhen put the alcohol lamp on the wooden board, filled the test tube with water, and covered the mouth of the test tube with a hose, and then the hose spared two turns on the test tube, and fixed the transparent head backwards.

"Ignition."

The alcohol lamp was lit, and the flame immediately began to bake the test tube.

Li Zhen put the burning wooden plank in the basin of water, but it was quiet.

Everyone waited for a long time, but there was still no movement, and they couldn't help but stare wide-eyed: "What are you doing?" ”

"I thought I could move, but I can't."

"Does that show the principle of a steam engine?"

"I don't think so, you don't see any movement."

“……”

And Liu Jinghong and the three suddenly understood, although the wooden plank was quietly floating on the water, they had already seen the principle.

Fang Hanxian nodded and said, "Isn't it that when the water in the test tube boils, this wooden board will generate momentum to run forward?" ”

Li Zhen said: "There is no need to wait until the water boils. ”

Suddenly, those students who came to see the excitement exclaimed: "It's moving!" ”

"It really moved. I'm going, really moving? ”

"No wind automatic?"

"Ah, yes, is that how the steam engine works? The steam was able to create a thrust back, so the boat moved. ”

"But, but the thrust is a little too small. This power is too weak, and the legendary steam engine is simply a very powerful machine. ”

"But he proved the principle of steam, and steam is really powered."

“……”

In the basin, the boat floated on its own, and after a while it hit the edge of the basin. But it is still moving forward, stumbling off, still moving forward, and then changing directions and moving forward. Here, the power of the boat itself can be clearly seen.

At this time, Li Zhen walked to the small blackboard and drew a container on the blackboard with chalk. In the container water was drawn with blue chalk, and a few wisps of smoke were drawn with a red red pen.

"Come here."

The three of them hurriedly walked to the blackboard. The other students in the auditorium did not leave, they all gathered around and looked at Li Zhen fixedly.

Li Zhen pointed to the container: "This container is full of water, and the water is represented by blue. And now, there is a flame boiling water underneath the vessel. What happens during the boiling of water, Brother Jinghong? ”

Liu Jinghong shouted: "In the process of boiling water...... Happens, happens to make the water boil? ”

Li Zhen shook his head: "Han Xian? ”

Fang Hanxian pondered for a while, pointed to the blue color and said, "Is it that in the process of boiling water, the water begins to transform into another form?" Is it to become steam? ”

Li Zhen shook his head: "It's close." Grace, you talk about it. ”

Qin Enze smiled bitterly: "I understand what it means." But I don't know why, I can't tell, I can't tell. ”

At this moment, a female classmate who was watching suddenly shouted: "Li Zhen, is it in the process of heating?" Water has become an invisible energy again? Transformed into another form of energy? ”

Li Zhenyi clapped his hands: "That's right." This is the principle of the steam engine, a very simple principle, but it is difficult for anyone to discover such a phenomenon without explaining it thoroughly. First of all, we need to know the three forms of water; Water, steam, ice. In the steam engine, there will be two forms of water, the original water, and the later steam. ”

"The water in this vessel, when it is not heated, is water. And after being heated......"

Li Zhen pointed to the blue line: "What comes out of the mouth of the bottle, or the vent, is the steam pressure." Steam has thrust. ”

"When the water in the container is heated, the air inside the container expands dramatically under the influence of thermal energy. If we plug the mouth of the container and keep heating it, the air inside will continue to expand as it is heated, and at a certain critical point, the whole container will explode. A force that emerges from within, this is the internal energy of the air. It explodes, it expands, so it has the energy to push. ”

"And when we add a vent to this container. The heat energy will have a place to pour, and all the heat energy will erupt down the pouring port. This erupting force is the power of steam. It is also an energy conversion process: from the chemical energy of water to the internal energy of air. ”

After Li Zhen finished speaking, the audience was silent, and everyone was silent.

Looking up, all the students took out their notebooks intently and hurriedly recorded these things in the notebooks.

Liu Jinghong wrote down every word Li Zhen said, and couldn't help but exclaim: "Who would have thought." In just one process of boiling water, there will be so many phenomena, so many incredible processes. I really understand how steam works. ”

"When I looked at the kettle, I knew in my heart that the water would boil and there would be steam. But I don't know why there is steam, that's why. ”

“……”

Li Zhen smiled bitterly, this is the sorrow of Kyushu, right?

Results-oriented. It does not focus on basic academics.

The faults of ancient products are not terrible. What is terrible is the fault line of ancient scholarship. The fault line of ancient scholarship is not terrible, but what is terrible is that there is also a fault in the thinking of the people of Kyushu.

No one pays attention to academics anymore. No one pays attention to the study of basic theories. Because studying theoretical academics won't make you famous, it takes time to validate.

But recovering an ancient artifact, even if you don't know the principle, it will make you famous in no time. This is the death of Kyushu.

The development of science began many years ago, and the world entered a wrong path......

Li Zhen looked at everyone looking at the simple steam principle with shocked faces, and an invisible pressure suddenly rose in his heart. It seems that there is a need to eradicate literacy for the world......